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A caldera ( ) is a large
cauldron A cauldron (or caldron) is a large pot (kettle) for cooking or boiling over an open fire, with a lid and frequently with an arc-shaped hanger and/or integral handles or feet. There is a rich history of cauldron lore in religion, mythology, and ...
-like hollow that forms shortly after the emptying of a magma chamber in a
volcano eruption Several types of volcanic eruptions—during which lava, tephra ( ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are of ...
. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a
crater Crater may refer to: Landforms *Impact crater, a depression caused by two celestial bodies impacting each other, such as a meteorite hitting a planet *Explosion crater, a hole formed in the ground produced by an explosion near or below the surfac ...
, the feature is actually a type of sinkhole, as it is formed through
subsidence Subsidence is a general term for downward vertical movement of the Earth's surface, which can be caused by both natural processes and human activities. Subsidence involves little or no horizontal movement, which distinguishes it from slope move ...
and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at
Kīlauea Kīlauea ( , ) is an active shield volcano in the Hawaiian Islands. Located along the southeastern shore of the Big Island of Hawaii, the volcano is between 210,000 and 280,000 years old and emerged above sea level about 100,000 years ago. His ...
, Hawaii in 2018.


Etymology

The term ''caldera'' comes from
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Can ...
', and Latin ', meaning "cooking pot". In some texts the English term ''cauldron'' is also used, though in more recent work the term ''cauldron'' refers to a caldera that has been deeply eroded to expose the beds under the caldera floor. The term ''caldera'' was introduced into the geological vocabulary by the German geologist
Leopold von Buch Christian Leopold von Buch (26 April 1774 – 4 March 1853), usually cited as Leopold von Buch, was a German geologist and paleontologist born in Stolpe an der Oder (now a part of Angermünde, Brandenburg) and is remembered as one of the most i ...
when he published his memoirs of his 1815 visit to the Canary Islands, where he first saw the Las Cañadas caldera on Tenerife, with Mount
Teide Teide, or Mount Teide, ( es, El Teide, Pico del Teide, , "Peak of Teide") is a volcano on Tenerife in the Canary Islands, Spain. Its summit (at ) is the highest point in Spain and the highest point above sea level in the islands of the A ...
dominating the landscape, and then the
Caldera de Taburiente Caldera de Taburiente National Park ( es, Parque Nacional de la Caldera de Taburiente) is a national park on the island of La Palma, Canary Islands, Spain. It contains the Caldera de Taburiente, which dominates the northern part of the island ...
on La Palma.


Caldera formation

A collapse is triggered by the emptying of the magma chamber beneath the volcano, sometimes as the result of a large explosive volcanic eruption (see Tambora in 1815), but also during effusive eruptions on the flanks of a volcano (see
Piton de la Fournaise Piton de la Fournaise (; en, "Peak of the Furnace") is a shield volcano on the eastern side of Réunion island (a French overseas department and region) in the Indian Ocean. It is currently one of the most active volcanoes in the world, al ...
in 2007) or in a connected fissure system (see
Bárðarbunga Bárðarbunga (), is a stratovolcano located under Vatnajökull in Vatnajökull National Park which is Iceland's most extensive glacier. The second highest mountain in Iceland, above sea level, Bárðarbunga is also part of a volcanic system tha ...
in 2014–2015). If enough magma is ejected, the emptied chamber is unable to support the weight of the volcanic edifice above it. A roughly circular fracture, the "ring fault", develops around the edge of the chamber. Ring fractures serve as feeders for fault intrusions which are also known as
ring dike A ring dike or ring dyke is an intrusive igneous body that is circular, oval or arcuate in plan and has steep contacts. While the widths of ring dikes differ, they can be up to several thousand meters. The most commonly accepted method of ring dik ...
s. Secondary volcanic vents may form above the ring fracture. As the magma chamber empties, the center of the volcano within the ring fracture begins to collapse. The collapse may occur as the result of a single cataclysmic eruption, or it may occur in stages as the result of a series of eruptions. The total area that collapses may be hundreds of square kilometers.


Mineralization in calderas

Some calderas are known to host rich
ore deposit Ore is natural rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated and sold at a profit.Encyclopædia Britannica. "Ore". Encyclopædia Britannica Online. Retrieved 7 April ...
s. Metal-rich fluids can circulate through the caldera, forming hydrothermal ore deposits of metals such as lead, silver, gold, mercury, lithium, and uranium. One of the world's best-preserved mineralized calderas is the
Sturgeon Lake Caldera Sturgeon Lake Caldera is a large extinct caldera complex in Kenora District of Northwestern Ontario, Canada. It is one of the world's best preserved mineralized Neoarchean caldera complexes, containing well-preserved mafic-intermediate pillow ...
in northwestern Ontario, Canada, which formed during the
Neoarchean The Neoarchean (; also spelled Neoarchaean) is the last geologic era in the Archean eon that spans from 2800 to 2500 million years ago—the period being defined chronometrically and not referencing a specific level in a rock section on Eart ...
era about 2.7 billion years ago. In the San Juan volcanic field, ore veins were emplaced in fractures associated with several calderas, with the greatest mineralization taking place near the youngest and most silicic intrusions associated with each caldera.


Types of caldera


Explosive caldera eruptions

Explosive caldera eruptions are produced by a magma chamber whose magma is rich in silica. Silica-rich magma has a high viscosity, and therefore does not flow easily like
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of a ...
. The magma typically also contains a large amount of dissolved gases, up to 7
wt% In chemistry, the mass fraction of a substance within a mixture is the ratio w_i (alternatively denoted Y_i) of the mass m_i of that substance to the total mass m_\text of the mixture. Expressed as a formula, the mass fraction is: : w_i = \frac ...
for the most silica-rich magmas. When the magma approaches the surface of the Earth, the drop in
confining pressure Pressure is force magnitude applied over an area. Overburden pressure is a geology term that denotes the pressure caused by the weight of the overlying layers of material at a specific depth under the earth's surface. Overburden pressure is also ca ...
causes the trapped gases to rapidly bubble out of the magma, fragmenting the magma to produce a mixture of
volcanic ash Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, created during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used to refer ...
and other
tephra Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they re ...
with the very hot gases. The mixture of ash and volcanic gases initially rises into the atmosphere as an eruption column. However, as the volume of erupted material increases, the eruption column is unable to entrain enough air to remain buoyant, and the eruption column collapses into a tephra fountain that falls back to the surface to form
pyroclastic flows A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of bu ...
. Eruptions of this type can spread ash over vast areas, so that ash flow tuffs emplaced by silicic caldera eruptions are the only volcanic product with volumes rivaling those of flood basalts. For example, when
Yellowstone Caldera The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States. The caldera and most of the park are located in the northwest corne ...
last erupted some 650,000 years ago, it released about 1,000 km3 of material (as measured in dense rock equivalent (DRE)), covering a substantial part of North America in up to two metres of debris. Eruptions forming even larger calderas are known, such as the La Garita Caldera in the San Juan Mountains of
Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the ...
, where the
Fish Canyon Tuff The Fish Canyon Tuff is the large volcanic ash flow or ignimbrite deposit resulting from one of the largest known explosive eruptions on Earth, estimated at . (see List of largest volcanic eruptions). The Fish Canyon Tuff eruption was centred at ...
was blasted out in eruptions about 27.8 million years ago. The caldera produced by such eruptions is typically filled in with tuff,
rhyolite Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals ( phenocrysts) in an otherwise fine-grained groundmass. The miner ...
, and other igneous rocks. The caldera is surrounded by an outflow sheet of ash flow tuff (also called an ash flow sheet). If magma continues to be injected into the collapsed magma chamber, the center of the caldera may be uplifted in the form of a ''
resurgent dome In geology, a resurgent dome is a dome formed by swelling or rising of a caldera floor due to movement in the magma chamber beneath it. Unlike a lava dome, a resurgent dome is not formed by the extrusion of highly viscous lava onto the surface, ...
'' such as is seen at the
Valles Caldera Valles Caldera (or Jemez Caldera) is a wide volcanic caldera in the Jemez Mountains of northern New Mexico. Hot springs, streams, fumaroles, natural gas seeps and volcanic domes dot the caldera floor landscape. The highest point in the caldera ...
, Lake Toba, the San Juan volcanic field, Cerro Galán,
Yellowstone Yellowstone National Park is an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the 42nd U.S. Congress with the Yellow ...
, and many other calderas. Because a silicic caldera may erupt hundreds or even thousands of cubic kilometers of material in a single event, it can cause catastrophic environmental effects. Even small caldera-forming eruptions, such as Krakatoa in 1883 or Mount Pinatubo in 1991, may result in significant local destruction and a noticeable drop in temperature around the world. Large calderas may have even greater effects. The ecological effects of the eruption of a large caldera can be seen in the record of the Lake Toba eruption in Indonesia. At some points in
geological time The geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochrono ...
, rhyolitic calderas have appeared in distinct clusters. The remnants of such clusters may be found in places such as the Eocene
Rum Rum is a liquor made by fermenting and then distilling sugarcane molasses or sugarcane juice. The distillate, a clear liquid, is usually aged in oak barrels. Rum is produced in nearly every sugar-producing region of the world, such as the Phi ...
Complex of Scotland, the San Juan Mountains of Colorado (formed during the Oligocene, Miocene, and Pliocene epochs) or the Saint Francois Mountain Range of Missouri (erupted during the Proterozoic eon).


Valles

For their 1968 paper that first introduced the concept of a resurgent caldera to geology, R.L. Smith and R.A. Bailey chose the Valles caldera as their model. Although the Valles caldera is not unusually large, it is relatively young (1.25 million years old) and unusually well preserved, and it remains one of the best studied examples of a resurgent caldera. The ash flow tuffs of the Valles caldera, such as the
Bandelier Tuff The Bandelier Tuff is a geologic formation exposed in and around the Jemez Mountains of northern New Mexico. It has a radiometric age of 1.85 to 1.25 million years, corresponding to the Pleistocene epoch. The tuff was erupted in a series of at ...
, were among the first to be thoroughly characterized.


Toba

About 74,000 years ago, this Indonesian volcano released about
dense-rock equivalent Dense-rock equivalent (DRE) is a volcanologic calculation used to estimate volcanic eruption volume. One of the widely accepted measures of the size of a historic or prehistoric eruption is the volume of magma ejected as pumice and volcanic ash, ...
of ejecta. This was the largest known eruption during the ongoing Quaternary period (the last 2.6 million years) and the largest known explosive eruption during the last 25 million years. In the late 1990s,
anthropologist An anthropologist is a person engaged in the practice of anthropology. Anthropology is the study of aspects of humans within past and present societies. Social anthropology, cultural anthropology and philosophical anthropology study the norms and v ...
Stanley Ambrose proposed that a volcanic winter induced by this eruption reduced the human population to about 2,000–20,000 individuals, resulting in a population bottleneck. More recently, Lynn Jorde and
Henry Harpending Henry Cosad Harpending (January 13, 1944 – April 3, 2016) was an American anthropologist and writer. He was a distinguished professor at the University of Utah, and formerly taught at Penn State and the University of New Mexico. He was a member ...
proposed that the human species was reduced to approximately 5,000–10,000 people. There is no direct evidence, however, that either theory is correct, and there is no evidence for any other animal decline or extinction, even in environmentally sensitive species. There is evidence that human habitation continued in India after the eruption.


Non-explosive calderas

Some volcanoes, such as the large shield volcanoes
Kīlauea Kīlauea ( , ) is an active shield volcano in the Hawaiian Islands. Located along the southeastern shore of the Big Island of Hawaii, the volcano is between 210,000 and 280,000 years old and emerged above sea level about 100,000 years ago. His ...
and Mauna Loa on the island of Hawaii, form calderas in a different fashion. The magma feeding these volcanoes is
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of a ...
, which is silica poor. As a result, the magma is much less
viscous The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the in ...
than the magma of a rhyolitic volcano, and the magma chamber is drained by large lava flows rather than by explosive events. The resulting calderas are also known as subsidence calderas and can form more gradually than explosive calderas. For instance, the caldera atop
Fernandina Island Fernandina Island ( Spanish: ''Isla Fernandina'', named after King Ferdinand of Spain, the sponsor of Christopher Columbus) (formerly known in English as Narborough Island, after John Narborough) is the third largest, and youngest, island of th ...
collapsed in 1968 when parts of the caldera floor dropped .


Extraterrestrial calderas

Since the early 1960s, it has been known that volcanism has occurred on other planets and moons in the Solar System. Through the use of crewed and uncrewed spacecraft, volcanism has been discovered on Venus, Mars, the Moon, and Io, a satellite of Jupiter. None of these worlds have plate tectonics, which contributes approximately 60% of the Earth's volcanic activity (the other 40% is attributed to
hotspot Hotspot, Hot Spot or Hot spot may refer to: Places * Hot Spot, Kentucky, a community in the United States Arts, entertainment, and media Fictional entities * Hot Spot (comics), a name for the DC Comics character Isaiah Crockett * Hot Spot (Tr ...
volcanism). Caldera structure is similar on all of these planetary bodies, though the size varies considerably. The average caldera diameter on Venus is . The average caldera diameter on Io is close to , and the mode is ;
Tvashtar Paterae Tvashtar Paterae compose an active volcanic region of Jupiter's moon Io located near its north pole. It is a series of paterae, or volcanic craters. It is named after Tvashtar, the Hindu god of blacksmiths. Tvashtar was discovered in IRTF i ...
is likely the largest caldera with a diameter of . The average caldera diameter on Mars is , smaller than Venus. Calderas on Earth are the smallest of all planetary bodies and vary from as a maximum.


The Moon

The Moon has an outer shell of low-density crystalline rock that is a few hundred kilometers thick, which formed due to a rapid creation. The craters of the Moon have been well preserved through time and were once thought to have been the result of extreme volcanic activity, but actually were formed by meteorites, nearly all of which took place in the first few hundred million years after the Moon formed. Around 500 million years afterward, the Moon's mantle was able to be extensively melted due to the decay of radioactive elements. Massive basaltic eruptions took place generally at the base of large impact craters. Also, eruptions may have taken place due to a magma reservoir at the base of the crust. This forms a dome, possibly the same morphology of a shield volcano where calderas universally are known to form. Although caldera-like structures are rare on the Moon, they are not completely absent. The Compton-Belkovich Volcanic Complex on the
far side of the Moon The far side of the Moon is the lunar hemisphere that always faces away from Earth, opposite to the near side, because of synchronous rotation in the Moon's orbit. Compared to the near side, the far side's terrain is rugged, with a multitud ...
is thought to be a caldera, possibly an ash-flow caldera.


Mars

The volcanic activity of Mars is concentrated in two major provinces:
Tharsis Tharsis () is a vast volcanic plateau centered near the equator in the western hemisphere of Mars. The region is home to the largest volcanoes in the Solar System, including the three enormous shield volcanoes Arsia Mons, Pavonis Mons, and As ...
and
Elysium Elysium (, ), otherwise known as the Elysian Fields ( grc, Ἠλύσιον πεδίον, ''Ēlýsion pedíon'') or Elysian Plains, is a conception of the afterlife that developed over time and was maintained by some Greek religious and philos ...
. Each province contains a series of giant shield volcanoes that are similar to what we see on Earth and likely are the result of mantle hot spots. The surfaces are dominated by lava flows, and all have one or more collapse calderas. Mars has the largest volcano in the Solar System, Olympus Mons, which is more than three times the height of Mount Everest, with a diameter of 520 km (323 miles). The summit of the mountain has six nested calderas.


Venus

Because there is no plate tectonics on Venus, heat is mainly lost by conduction through the lithosphere. This causes enormous lava flows, accounting for 80% of Venus' surface area. Many of the mountains are large shield volcanoes that range in size from in diameter and high. More than 80 of these large shield volcanoes have summit calderas averaging across.


Io

Io, unusually, is heated by solid flexing due to the tidal influence of Jupiter and Io's
orbital resonance In celestial mechanics, orbital resonance occurs when orbiting bodies exert regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers. Most commonly, this relations ...
with neighboring large moons
Europa Europa may refer to: Places * Europe * Europa (Roman province), a province within the Diocese of Thrace * Europa (Seville Metro), Seville, Spain; a station on the Seville Metro * Europa City, Paris, France; a planned development * Europa Clif ...
and Ganymede, which keep its orbit slightly
eccentric Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-center, in geometry * Eccentricity (graph theory) of a v ...
. Unlike any of the planets mentioned, Io is continuously volcanically active. For example, the NASA '' Voyager 1'' and '' Voyager 2'' spacecraft detected nine erupting volcanoes while passing Io in 1979. Io has many calderas with diameters tens of kilometers across.


List of volcanic calderas

*
Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
** Ngorongoro Crater (Tanzania) **
Menengai Menengai Crater is a massive shield volcano with one of the biggest calderas in the world, in the Great Rift Valley, Kenya. It is the largest volcano caldera in Kenya and the second largest volcano caldera in Africa. Volcanic formed rich loam soil ...
Crater (Kenya) **
Mount Elgon Mount Elgon is an extinct shield volcano on the border of Uganda and Kenya, north of Kisumu and west of Kitale. The mountain's highest point, named "Wagagai", is located entirely within Uganda.
(Uganda/Kenya) **
Mount Fogo Pico do Fogo is the highest peak of Cape Verde and West Africa, rising to above sea level. It is an active stratovolcano lying on the island of Fogo. The main cone last erupted in 1680, causing mass emigration from the island. A subsidiary vent ...
(Cape Verde) **
Mount Longonot Mount Longonot is a stratovolcano located southeast of Lake Naivasha in the Great Rift Valley of Kenya, Africa. It is thought to have last erupted in the 1860s. Its name is derived from the Maasai word ''Oloonong'ot'', meaning "mountains of many ...
(Kenya) **
Mount Meru Mount Meru (Sanskrit/ Pali: मेरु), also known as Sumeru, Sineru or Mahāmeru, is the sacred five-peaked mountain of Hindu, Jain, and Buddhist cosmology and is considered to be the centre of all the physical, metaphysical and spir ...
(Tanzania) **
Erta Ale Erta Ale (or Ertale or Irta'ale; Amharic: ኤርታሌ) is a continuously active basaltic shield volcano in the Afar Region of northeastern Ethiopia. It is situated in the Afar Depression, a barren desert area. Erta Ale is the most active volcan ...
(Ethiopia) **
Nabro Volcano The Nabro Volcano is an active stratovolcano in the Southern Red Sea Region of Eritrea. It is located at the south-east end of the Danakil Alps in the Danakil Depression. Before its 2011 eruption, the volcano was widely believed to be extinct. ...
(Eritrea) ** Mallahle (Eritrea) ** ''See ''Europe'' for calderas in the Canary Islands * Americas **
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
***
Aguas Calientes Agua Caliente, Aguas Calientes or Aguascalientes (Spanish for 'hot/warm water(s)' or 'hot spring(s)') may refer to: Places Central America * Agua Caliente, El Salvador * San Antonio Aguas Calientes, Guatemala Mexico * Aguascalientes, a state in ...
, Salta Province *** Caldera del Atuel, Mendoza Province ***
Galán Cerro Galán is a caldera in the Catamarca Province of Argentina. It is one of the largest exposed calderas in the world and forms part of the Central Volcanic Zone of the Andes, one of the three volcanic belts found in South America. One of s ...
,
Catamarca Province Catamarca () is a province of Argentina, located in the northwest of the country. The province had a population of 334,568 as per the , and covers an area of 102,602 km2. Its literacy rate is 95.5%. Neighbouring provinces are (clockwise, fr ...
**
Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...
*** Pastos Grandes ** United States ***
Mount Aniakchak Mount Aniakchak (russian: Аниакчак) is a 3,700-year-old volcanic caldera approximately in diameter, located in the Aleutian Range of Alaska, United States. Although a stratovolcano by composition, the pre-existing mountain collapsed in ...
(
Aniakchak National Monument and Preserve Aniakchak National Monument and Preserve is a U.S. National Monument and National Preserve, consisting of the region around the Aniakchak volcano on the Aleutian Range of south-western Alaska. The monument is one of the least-visited places in ...
) (
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
) ***
Crater Lake Crater Lake (Klamath: ''Giiwas'') is a volcanic crater lake in south-central Oregon in the western United States. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. The lake partly fills ...
on
Mount Mazama Mount Mazama (''Giiwas'' in the Native American language Klamath) is a complex volcano in the state of Oregon, United States, in a segment of the Cascade Volcanic Arc and Cascade Range. Most of the mountain collapsed following a major eruptio ...
(
Crater Lake National Park Crater Lake National Park is an American national park located in southern Oregon. Established in 1902, Crater Lake is the fifth-oldest national park in the United States and the only national park in Oregon. The park encompasses the caldera of ...
, Oregon) ***
Mount Katmai Mount Katmai (russian: Катмай) is a large stratovolcano (composite volcano) on the Alaska Peninsula in southern Alaska, located within Katmai National Park and Preserve. It is about in diameter with a central lake-filled caldera about i ...
(Alaska) ***
Kīlauea Kīlauea ( , ) is an active shield volcano in the Hawaiian Islands. Located along the southeastern shore of the Big Island of Hawaii, the volcano is between 210,000 and 280,000 years old and emerged above sea level about 100,000 years ago. His ...
( Hawaii) *** Mauna Loa ( Hawaii) *** La Garita Caldera (
Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the ...
) *** Long Valley ( California) ***
Henry's Fork Caldera The Henry's Fork Caldera in eastern Idaho is a caldera located in an area known as Island Park, west of Yellowstone National Park. The caldera was formed by an eruption 1.3 million years ago of the Yellowstone hotspot. The eruption distributed ...
(
Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyomi ...
) ***
Island Park Caldera The Island Park Caldera, in the U.S. states of Idaho and Wyoming, is one of the world's largest calderas, with approximate dimensions of 80 by 65 km. Its ashfall is the source of the Huckleberry Ridge Tuff that is found from southern Cali ...
(Idaho, Wyoming) ***
Newberry Volcano Newberry Volcano is a large active shield-shaped stratovolcano located about south of Bend, Oregon, United States, east of the major crest of the Cascade Range, within the Newberry National Volcanic Monument. Its highest point is Paulina Peak. ...
(Oregon) ***
McDermitt Caldera The McDermitt Caldera is a large, oval-shaped caldera west of McDermitt, Nevada–Oregon, McDermitt in southeastern Oregon and northern Nevada in the United States. It is about long north–south and wide east–west. The western part of the c ...
(Oregon) ***
Medicine Lake Volcano Medicine Lake Volcano is a large shield volcano in northeastern California about northeast of Mount Shasta. The volcano is located in a zone of east-west crustal extension east of the main axis of the Cascade Volcanic Arc and the Cascade Ra ...
(California) *** Mount Okmok (Alaska) ***
Valles Caldera Valles Caldera (or Jemez Caldera) is a wide volcanic caldera in the Jemez Mountains of northern New Mexico. Hot springs, streams, fumaroles, natural gas seeps and volcanic domes dot the caldera floor landscape. The highest point in the caldera ...
( New Mexico) ***
Yellowstone Caldera The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States. The caldera and most of the park are located in the northwest corne ...
(Wyoming) ** Canada ***
Silverthrone Caldera The Silverthrone Caldera is a potentially active caldera complex in southwestern British Columbia, Canada, located over northwest of the city of Vancouver and about west of Mount Waddington in the Pacific Ranges of the Coast Mountains. The cald ...
( British Columbia) ***
Mount Edziza Mount Edziza is a stratovolcano in the Stikine Country of northwestern British Columbia, Canada. The volcano and the surrounding area are protected within Mount Edziza Provincial Park. It consists of multiple peaks and ridges, with several gl ...
(British Columbia) ***
Bennett Lake Volcanic Complex The Bennett Lake Volcanic Complex (BLVC) is a huge 50-million-year-old extinct caldera complex that spans across the British Columbia-Yukon border in Canada. It is located near the western end of the West Arm of Bennett Lake. The caldera complex ...
(British Columbia/ Yukon) *** Mount Pleasant Caldera ( New Brunswick) ***
Sturgeon Lake Caldera Sturgeon Lake Caldera is a large extinct caldera complex in Kenora District of Northwestern Ontario, Canada. It is one of the world's best preserved mineralized Neoarchean caldera complexes, containing well-preserved mafic-intermediate pillow ...
( Ontario) *** Mount Skukum Volcanic Complex (Yukon) ***
Blake River Megacaldera Complex The Blake River Megacaldera Complex is a giant subaqueous caldera cluster or a nested caldera system that spans across the Ontario–Quebec border in Canada. The caldera complex is around 2.7 billion years old, consisting of a series of overlappi ...
( Quebec/Ontario) ****
New Senator Caldera The New Senator Caldera is a large Archean caldera complex within the heart of the Blake River Megacaldera Complex, Quebec, Canada. It has a diameter of 15-30 kilometers and is made of thick massive mafic sequences. The caldera complex has in ...
(Quebec) ****
Misema Caldera The Misema Caldera is a 2,704-2,707 million year old caldera in Ontario and Quebec, Canada. Geographic extent It is the caldera that forms the Blake River Megacaldera ComplexNoranda Caldera The Noranda Caldera is a well-known large subaqueous Archean caldera complex within the Blake River Megacaldera Complex, Quebec, Canada. The caldera contains a 7-to-9-km-thick succession of bimodal mafic-felsic tholeiitic to calc-alkaline volcan ...
(Quebec) ** Colombia *** Arenas crater caldera, Nevado del Ruiz volcano,
Caldas Department Caldas () is a department of Colombia named after Colombian patriotic figure Francisco José de Caldas. It is part of the Paisa Region and its capital is Manizales. The population of Caldas is 998,255, and its area is 7,291 km². Caldas is ...
*** Laguna Verde caldera,
Azufral Azufral is a stratovolcano located in the department of Nariño in southern Colombia, west of the town of Túquerres. It is the only volcano of the Western Ranges of the Colombian Andes. Its name derives from the Spanish word for sulfur, '' ...
volcano, Narino Department ** Mexico ***
La primavera Caldera LA most frequently refers to Los Angeles, the second largest city in the United States. La, LA, or L.A. may also refer to: Arts and entertainment Music * La (musical note), or A, the sixth note * "L.A.", a song by Elliott Smith on ''Figur ...
(
Jalisco Jalisco (, , ; Nahuatl: Xalixco), officially the Free and Sovereign State of Jalisco ( es, Estado Libre y Soberano de Jalisco ; Nahuatl: Tlahtohcayotl Xalixco), is one of the 31 states which, along with Mexico City, comprise the 32 Federal En ...
) *** Amealco Caldera ( Querétaro) *** Las Cumbres Caldera ( Veracruz-
Puebla Puebla ( en, colony, settlement), officially Free and Sovereign State of Puebla ( es, Estado Libre y Soberano de Puebla), is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 217 municipalities and its cap ...
) *** Los Azufres Caldera ( Michoacán) ***
Los Humeros Caldera LOS, or Los, or LoS may refer to: Science and technology * Length of stay, the duration of a single episode of hospitalisation * Level of service, a measure used by traffic engineers * Level of significance, a measure of statistical significanc ...
(Veracruz-Puebla) ***
Mazahua Caldera Mazahua may refer to: * Mazahua people, an indigenous people of Mexico * Mazahua language The Mazahua language ( maz, Jñatrjo) is an Oto-Pamean language spoken in the central states of Mexico by the ethnic group that is widely known as the M ...
(
Mexico State The State of Mexico ( es, Estado de México; ), officially just Mexico ( es, México), is one of the 32 federal entities of the United Mexican States. Commonly known as Edomex (from ) to distinguish it from the name of the whole country, it is ...
) **
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
***
Chaitén Chaitén (, ) is a Chilean town, commune and former capital of the Palena Province in Los Lagos Region. The town is north of the mouth of Yelcho River, on the east coast of the Gulf of Corcovado. The town is strategically close to the norther ...
*** Cordillera Nevada Caldera ***
Laguna del Maule Laguna del Maule () is a lake located in the Andes of Central Chile Central Chile (''Zona central'') is one of the five natural regions into which CORFO divided continental Chile in 1950. It is home to a majority of the Chilean population ...
*** Pacana Caldera ***
Sollipulli Sollipulli (; in the Mapuche language) is an ice-filled volcanic caldera and volcanic complex, which lies southeast of the small town of Melipeuco in the La Araucanía Region, Chile. It is part of the Southern Volcanic Zone of the Andes, one of ...
** Ecuador ***
Pululahua Geobotanical Reserve Reserva Geobotánica Pululahua (''Pululahua Geobotanical Reserve'') (''Cloud of Water Geobontanical Reserve'') is a protected area around Pululahua Volcano in the north of Quito Canton, Pichincha Province Pichincha () is a province of Ecuador l ...
*** Cuicocha *** Quilotoa ***
Fernandina Island Fernandina Island ( Spanish: ''Isla Fernandina'', named after King Ferdinand of Spain, the sponsor of Christopher Columbus) (formerly known in English as Narborough Island, after John Narborough) is the third largest, and youngest, island of th ...
,
Galápagos Islands The Galápagos Islands ( Spanish: , , ) are an archipelago of volcanic islands. They are distributed on each side of the equator in the Pacific Ocean, surrounding the centre of the Western Hemisphere, and are part of the Republic of Ecuador ...
***
Sierra Negra (Galápagos) Sierra Negra ( Spanish: ''Black Mountain'') is a large shield volcano at the southeastern end of Isabela Island in the Galapagos that rises to an altitude of 1124m. It coalesces with the volcanoes Cerro Azul to the west and Alcedo to the nort ...
** El Salvador ***
Lake Ilopango Lake Ilopango is a crater lake which fills an 8 by 11 km (72 km2 or 28 sq mi) volcanic caldera in central El Salvador, on the borders of the San Salvador, La Paz, and Cuscatlán departments. The caldera, which contains the second lar ...
***
Lake Coatepeque Caldera De Coatepeque (Nahuatl ''cōātepēc'', "at the snake hill") is a volcanic caldera in El Salvador in Central America. The caldera was formed during a series of rhyolitic explosive eruptions between about 72,000 and 57,000 years ago. ...
** Guatemala ***
Lake Amatitlán Lake Amatitlán (''Lago Amatitlán'', ) is a lake located within the Amatitlán caldera in south-central Guatemala, fairly close to Guatemala City. It lies in the central highlands, 1,186 m (3890 feet) above sea level. Its maximum depth is ...
***
Lake Atitlán Lake Atitlán ( es, links=no, Lago de Atitlán, ) is a lake in the Guatemalan Highlands of the Sierra Madre mountain range. The lake is located in the Sololá Department of southwestern Guatemala. It is known as the deepest lake in Central Amer ...
*** Xela *** Barahona ** Other ***
Masaya Masaya () is the capital city of Masaya Department in Nicaragua. It is situated approximately 14 km west of Granada, Nicaragua, Granada and 31 km southeast of Managua. It is located just east of the Masaya Volcano, an active volcano ...
(Nicaragua) *
Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...
** East Asia *** Dakantou Caldera (大墈头) (Shanhuyan Village, Taozhu Town,
Linhai Linhai (; Tai-chow dialect: Lin-he) is a county-level city in Taizhou, Zhejiang Province situated on the banks of the Lin River in Eastern China. As of the 2020 census, its population was 1,114,146 inhabitants even though its built-up (''or m ...
, Zhejiang, China) *** Ma'anshan Caldera (马鞍山) (Shishan Town (石山镇), Xiuying, Hainan, China) ***
Yiyang Caldera Yiyang () is a prefecture-level city on the Zi River in Hunan province, China, straddling Lake Dongting and bordering Hubei to the north. According to the 2010 Census, Yiyang has a population of 4,313,084 inhabitants residing in an area of . T ...
(宜洋) (Shuangxi Town (双溪镇宜洋村),
Pingnan County, Fujian Pingnan County () is an inland county in northeastern Fujian province, People's Republic of China. It is located in the cultural region of ''Mindong'' (), and lies in the west of Ningde City. Administration The population of Pingnan stands at ...
, China) ***
Aira Caldera Aira Caldera is a gigantic volcanic caldera that is located on the southern end of Kyushu, Japan. It is believed to have been formed about 30,000 years ago with a succession of pyroclastic surges. It is currently the place of residence to over 9 ...
(
Kagoshima Prefecture is a prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,599,779 (1 January 2020) and has a geographic area of 9,187 km2 (3,547 sq mi). Kagoshima Prefecture borders Kumamoto Pre ...
, Japan) *** Kussharo ( Hokkaido, Japan) *** Kuttara (Hokkaido, Japan) *** Mashū (Hokkaido, Japan) ***
Aso Caldera Aso caldera (also known as Asosan, the Aso Volcano or Mount Aso, although the later term usually is used related to its currently active vents) is a geographical feature of Kumamoto Prefecture, Japan. It stretches 25 kilometers north to south a ...
,
Mount Aso Mount is often used as part of the name of specific mountains, e.g. Mount Everest. Mount or Mounts may also refer to: Places * Mount, Cornwall, a village in Warleggan parish, England * Mount, Perranzabuloe, a hamlet in Perranzabuloe parish, C ...
( Kumamoto Prefecture, Japan) ***
Kikai Caldera (alternatively Kikaiga-shima, Kikai Caldera Complex) is a massive, mostly submerged caldera up to in diameter in the Ōsumi Islands of Kagoshima Prefecture, Japan. Geology Caldera formation has been dated from about 95,000 years ago and has i ...
(Kagoshima Prefecture, Japan) *** Towada (
Aomori Prefecture is a prefecture of Japan in the Tōhoku region. The prefecture's capital, largest city, and namesake is the city of Aomori. Aomori is the northernmost prefecture on Japan's main island, Honshu, and is bordered by the Pacific Ocean to the eas ...
, Japan) *** Tazawa (
Akita Prefecture is a prefecture of Japan located in the Tōhoku region of Honshu.Nussbaum, Louis-Frédéric. (2005). "Provinces and prefectures" in ; "Tōhoku" in . Its population is approximately 966,000 (as of 1 October 2019) and its geographic area is 11,6 ...
, Japan) *** Hakone ( Kanagawa Prefecture, Japan) ***
Mount Halla Hallasan is a shield volcano on Jeju Island in South Korea; it is the highest point of South Korea and the second-highest mountain in Korea overall, after Paektu Mountain. The area around the mountain is a designated national park, the Halla ...
( Jeju-do, South Korea) ***
Heaven Lake Heaven Lake ( Korean: , ''Ch'ŏnji'' or ''Cheonji''; zh, 天池, ''Tiānchí''; Manchu: ''Tamun omo'' or ''Tamun juce'') is a crater lake on the border between China and North Korea. It lies within a caldera atop the volcanic Paektu Moun ...
(
Baekdu Mountain Paektu Mountain (), also known as Baekdu Mountain and in China as Changbai Mountain ( zh, s=长白山, t=長白山; Manchu: Golmin Šanggiyan Alin), is an active stratovolcano on the Chinese–North Korean border. At , it is the highest moun ...
, North Korea/
Changbai Mountains The Changbai Mountains (simplified Chinese:长白山; traditional Chinese:長白山) are a major mountain range in Northeast Asia that extends from the Northeast Chinese provinces of Heilongjiang, Jilin and Liaoning, across the border between ...
, China) ** Southeast Asia *** Apolaki Caldera (
Benham Rise The Benham Rise, officially known as Philippine Rise, is an extinct volcanic ridge located in the Philippine Sea approximately east of the northern coastline of Dinapigue, Isabela. The rise has been known to the people of Catanduanes as Kali ...
, Philippines) ***
Corregidor Caldera Corregidor Caldera is an extinct volcanic caldera located at the entrance to Manila Bay in the Philippines. The caldera is composed of the islands of Corregidor and Caballo in the province of Cavite,Mount Pinatubo ( Luzon, Philippines) *** Taal Volcano (Luzon, Philippines) ***
Laguna Caldera Laguna Caldera is a potentially active volcanic caldera and a geographical depression in Rizal, Philippines. It is broadly elliptical in shape, with dimensions of 20 by 10 km. It has a summit elevation of 743 m or 2,438 feet. The caldera forms ...
(Luzon, Philippines) *** Irosin Caldera (Luzon, Philippines) *** Batur (
Bali Bali () is a province of Indonesia and the westernmost of the Lesser Sunda Islands. East of Java and west of Lombok, the province includes the island of Bali and a few smaller neighbouring islands, notably Nusa Penida, Nusa Lembongan, and N ...
, Indonesia) *** Krakatoa (
Sunda Strait The Sunda Strait ( id, Selat Sunda) is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea with the Indian Ocean. Etymology The strait takes its name from the Sunda Kingdom, which ruled the western portion of ...
, Indonesia) ***
Lake Maninjau Lake Maninjau ( id, Danau Maninjau, meaning "overlook" or "observation" in the Minangkabau language) is a caldera lake in West Sumatra, Indonesia. It is located to the west of Bukittinggi, at . Formation The Maninjau caldera was formed by a volc ...
( Sumatra, Indonesia) *** Lake Toba (Sumatra, Indonesia) ***
Mount Rinjani Mount Rinjani ( id, Gunung Rinjani) is an active volcano in Indonesia on the island of Lombok. Administratively the mountain is in the Regency of North Lombok, West Nusa Tenggara (Indonesian: ''Nusa Tenggara Barat'', NTB). It rises to , maki ...
( Lombok, Indonesia) ***
Mount Tondano Mount Tondano in the province of North Sulawesi, Sulawesi, Indonesia, has a 20 × 30 km wide caldera which was formed in the Late Miocene or Early Pliocene by a massive eruption. Post caldera activity includes pyroclastic cones, obsidian flo ...
( Sulawesi, Indonesia) ***
Mount Tambora Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands, it was formed by the active subduction zones beneath it. Before 1815, its elevation reached more than ...
( Sumbawa, Indonesia) *** Tengger Caldera ( Java, Indonesia) ** Southwest Asia *** Derik (
Mardin Mardin ( ku, Mêrdîn; ar, ماردين; syr, ܡܪܕܝܢ, Merdīn; hy, Մարդին) is a city in southeastern Turkey. The capital of Mardin Province, it is known for the Artuqid architecture of its old city, and for its strategic location o ...
, Turkey) ***
Nemrut (volcano) Nemrut ( tr, Nemrut Dağı, hy, Սարակն ''Sarakn'', "Mountain spring", , ku, Çiyayê Nemrudê) is a dormant volcano in Eastern Turkey, close to Lake Van. The volcano is named after King Nimrod who is said to have ruled this area in about ...
(Turkey) **
Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eight ...
*** Akademia Nauk (
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) ***
Golovnin Golovnin ( ja, 泊山, ''Tomari-yama''; russian: Головнин) is a caldera located in the southern part of Kunashir Island, Kuril Islands, Russia. It is the southernmost volcano of the Kuril Islands. It is named after Russian explorer Vasil ...
(
Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...
) *** Karymsky Caldera (
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) *** Karymshina (
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) *** Khangar (
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) ***
Ksudach Ksudach (russian: Ксудач) (also known as Vonyuchy Khrebet Volcano) is a stratovolcano in southern Kamchatka, Russia. The last eruption of Ksudach was in March 1907, on or around 28 March, which was one of the largest ever recorded in Kamch ...
(
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) ***
Kurile Lake Kurile Lake (russian: Кури́льское о́зеро, Kuríl'skoye Ózero) is a caldera and crater lake in Kamchatka, Russia. It is also known as Kurilskoye Lake or Kuril Lake. It is part of the Eastern Volcanic Zone of Kamchatka which, to ...
(
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) *** Lvinaya Past (
Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...
) ***
Tao-Rusyr Caldera Tao-Rusyr Caldera (russian: Тао-Русыр) is a stratovolcano located at the southern end of Onekotan Island, Kuril Islands, Russia. It has 7.5 km wide caldera formed during a catastrophic eruption less than 10,000 years ago (reported ag ...
(
Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...
) *** Uzon (
Kamchatka Peninsula The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and west ...
) ***
Zavaritski Caldera Zavaritski Caldera (russian: Вулкан Заварицкого, ''Vulkan Zavaritskogo'') is a caldera located in the central part of Simushir Island, Kuril Islands, Russia. Lake Biryuzovoe partially fills the youngest of three nested calderas o ...
(
Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...
) *** Yankicha/Ushishir (
Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...
) *** Chegem Caldera (
Kabardino-Balkarian Republic The Kabardino-Balkarian Republic (russian: Кабарди́но-Балка́рская Респу́блика, ''Kabardino-Balkarskaya Respublika''; kbd, Къэбэрдей-Балъкъэр Республикэ, ''Ķêbêrdej-Baĺķêr Respublik� ...
,
North Caucasus The North Caucasus, ( ady, Темыр Къафкъас, Temır Qafqas; kbd, Ишхъэрэ Къаукъаз, İṩxhərə Qauqaz; ce, Къилбаседа Кавказ, Q̇ilbaseda Kavkaz; , os, Цӕгат Кавказ, Cægat Kavkaz, inh, ...
) * Europe **
Banská Štiavnica Banská Štiavnica (; german: Schemnitz; hu, Selmecbánya (Selmec), ) is a town in central Slovakia, in the middle of an immense caldera created by the collapse of an ancient volcano. For its size, the caldera is known as the Štiavnica Mountain ...
(Slovakia) ** Bakuriani/Didveli Caldera (Georgia) ** Samsari (Georgia) ** Santorini (Greece) **
Nisyros Nisyros also spelled Nisiros ( el, Νίσυρος, Nísiros) is a volcanic Greek island and municipality located in the Aegean Sea. It is part of the Dodecanese group of islands, situated between the islands of Kos and Tilos. Its shape is a ...
(Greece) **
Askja Askja () is an active volcano situated in a remote part of the central highlands of Iceland. The name Askja refers to a complex of nested calderas within the surrounding Dyngjufjöll mountains, which rise to , ''askja'' meaning ''box'' or '' ...
(Iceland) **
Grímsvötn Grímsvötn (; ''vötn'' = "waters", singular: ) is a volcano with a (partially subglacial) fissure system located in Vatnajökull National Park, Iceland. The volcano itself is completely subglacial and located under the northwestern side of the ...
(Iceland) **
Bárðarbunga Bárðarbunga (), is a stratovolcano located under Vatnajökull in Vatnajökull National Park which is Iceland's most extensive glacier. The second highest mountain in Iceland, above sea level, Bárðarbunga is also part of a volcanic system tha ...
(Iceland) ** Katla (Iceland) **
Krafla Krafla () is a volcanic caldera of about 10 km in diameter with a 90 km long fissure zone. It is located in the north of Iceland in the Mývatn region and is situated on the Iceland hotspot atop the Mid-Atlantic Ridge, which forms the d ...
(Iceland) **
Phlegraean Fields The Phlegraean Fields ( it, Campi Flegrei ; nap, Campe Flegree, from Ancient Greek 'to burn') is a large region of supervolcanic calderas situated to the west of Naples, Italy. It was declared a regional park in 2003. The area of the c ...
(Italy) **
Lake Bracciano Lake Bracciano ( it, Lago di Bracciano) is a lake of volcanic origin in the Italian region of Lazio, northwest of Rome. It is the second largest lake in the region (second only to Lake Bolsena) and one of the major lakes of Italy. It has a circ ...
(Italy) **
Lake Bolsena Lake Bolsena ( it, Lago di Bolsena) is a lake of volcanic origin in the northern part of the province of Viterbo called ''Alto Lazio'' ("Upper Latium") or ''Tuscia'' in central Italy. It is the largest volcanic lake in Europe. Roman histori ...
(Italy) **
Mount Somma Mount Somma ( it, Monte Somma) is a mountain located in the Province of Naples, in the Campania region of southern Italy. Mount Somma is an integral part of the Somma–Vesuvius volcanic complex. It is high. Geography Mount Somma is the rem ...
which contains Mount Vesuvius (Italy) ** Las Cañadas ( Tenerife, Spain) **
Glen Coe Glen Coe ( gd, Gleann Comhann ) is a glen of volcanic origins, in the Highlands of Scotland. It lies in the north of the county of Argyll, close to the border with the historic province of Lochaber, within the modern council area of Highlan ...
(Scotland) ** Scafell Caldera (
Lake District The Lake District, also known as the Lakes or Lakeland, is a mountainous region in North West England. A popular holiday destination, it is famous for its lakes, forests, and mountains (or '' fells''), and its associations with William Wordswor ...
, England) **
Laacher See Laacher See (), also known as Lake Laach or Laach Lake, is a volcanic caldera lake with a diameter of in Rhineland-Palatinate, Germany, about northwest of Koblenz, south of Bonn, and west of Andernach. It is in the Eifel mountain range, and ...
(Germany) **
Lagoa das Sete Cidades Lagoa (Portuguese for ''lagoon'') may refer to the following: People *Barbara Lagoa, Cuban-American federal judge Places Brazil * Campina da Lagoa, Paraná * Lagoa, Paraíba, Paraíba *Lagoa, Rio de Janeiro, a quarter of Rio de Janeiro * Lagoa A ...
&
Furnas Furnas is a civil parish in the municipality of Povoação on the island of São Miguel in the Portuguese Azores. The population in 2011 was 1,439, in an area of 34.43 km2. The parish is one of the largest in the island and in the Azores. ...
( São Miguel,
the Azores ) , motto =( en, "Rather die free than subjected in peace") , anthem= ( en, "Anthem of the Azores") , image_map=Locator_map_of_Azores_in_EU.svg , map_alt=Location of the Azores within the European Union , map_caption=Location of the Azores wi ...
, Portugal) ** Caldeira do Faial ( Faial, Portugal) ** Caldeirão do Corvo ( Corvo, Portugal) * Oceania ** Cerberean Cauldron (Australia) ** Dakataua (Papua New Guinea) ** Kapenga (New Zealand) ** Kilauea ( Hawaii, US) ** Lake Ohakuri (New Zealand) **
Lake Ōkataina Lake Ōkataina (also spelled Okataina; mi, Te Moana i kataina ā Te Rangitakaroro or ) is the northernmost and largest of four smaller lakes lying between Lake Rotorua and Lake Tarawera in the Bay of Plenty Region of New Zealand's North Island ...
(New Zealand) ** Lake Rotorua (New Zealand) **
Lake Taupō Lake Taupō (also spelled Taupo; mi, Taupō-nui-a-Tia or ) is a large crater lake in New Zealand's North Island, located in the caldera of the Taupō Volcano. The lake is the namesake of the town of Taupō, which sits on a bay in the lake's n ...
(New Zealand) ** Maroa (New Zealand) ** Moku‘āweoweo Caldera on Mauna Loa (Hawaii, US) **
Mount Warning Mount Warning ( Bundjalung: ''Wollumbin''), a mountain in the Tweed Range in the Northern Rivers region of New South Wales, Australia, was formed from a volcanic plug of the now-gone Tweed Volcano. The mountain is located west-south-west of ...
(Australia) ** Prospect Hill (Australia) **
Rano Kau Rano Kau is a tall dormant volcano that forms the southwestern headland of Easter Island, a Chilean island in the Pacific Ocean. It was formed of basaltic lava flows in the Pleistocene with its youngest rocks dated at between 150,000 and 210,0 ...
(
Easter Island Easter Island ( rap, Rapa Nui; es, Isla de Pascua) is an island and special territory of Chile in the southeastern Pacific Ocean, at the southeasternmost point of the Polynesian Triangle in Oceania. The island is most famous for its nearly ...
, Chile) ** Reporoa caldera (New Zealand) *
Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest contine ...
**
Deception Island Deception Island is an island in the South Shetland Islands close to the Antarctic Peninsula with a large and usually "safe" natural harbor, which is occasionally troubled by the underlying active volcano. This island is the caldera of an ac ...
* Indian Ocean **
Cirque de Mafate The ''Cirque de Mafate'' is a caldera on Réunion Island ( France; located in the Indian Ocean). It was formed from the collapse of the large shield volcano the ''Piton des Neiges''. The very remote and inaccessible cirque was settled in the 1 ...
, Cirque de Salazie, Enclos Fouqué, and Cirque de Cilaos on
Réunion Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island o ...


Extraterrestrial volcanic calderas

* Mars ** Olympus Mons caldera * Venus **
Maat Mons Maat Mons is a massive shield volcano on the planet Venus and the planet's second-highest mountain and highest volcano. It rises above the mean planetary radius at , and nearly 5 km above the surrounding plains. It is named after the Egypti ...
caldera


Erosion calderas

* Americas ** Guaichane-Mamuta (Chile) **
Mount Tehama Mount Tehama (also called Brokeoff Volcano or Brokeoff Mountain) is an eroded andesitic stratovolcano in the Cascade Volcanic Arc and the Cascade Range in Northern California. Part of the Lassen volcanic area, its tallest remnant, Brokeoff Moun ...
( California, US) * Europe **
Caldera de Taburiente Caldera de Taburiente National Park ( es, Parque Nacional de la Caldera de Taburiente) is a national park on the island of La Palma, Canary Islands, Spain. It contains the Caldera de Taburiente, which dominates the northern part of the island ...
(Spain) * Oceania **
Tweed Valley Tweed is a rough, woollen fabric, of a soft, open, flexible texture, resembling cheviot or homespun, but more closely woven. It is usually woven with a plain weave, twill or herringbone structure. Colour effects in the yarn may be obtained ...
( New South Wales, Queensland, Australia) * Asia ** Chegem Caldera (
Kabardino-Balkarian Republic The Kabardino-Balkarian Republic (russian: Кабарди́но-Балка́рская Респу́блика, ''Kabardino-Balkarskaya Respublika''; kbd, Къэбэрдей-Балъкъэр Республикэ, ''Ķêbêrdej-Baĺķêr Respublik� ...
,
Northern Caucasus Region Northern may refer to the following: Geography * North, a point in direction * Northern Europe, the northern part or region of Europe * Northern Highland, a region of Wisconsin, United States * Northern Province, Sri Lanka * Northern Range, a ...
, Russia) ** Taal volcano (Philippines)
Batangas Province Batangas, officially the Province of Batangas ( tl, Lalawigan ng Batangas ), is a province in the Philippines located in the Calabarzon region on Luzon. Its capital is the city of Batangas, and is bordered by the provinces of Cavite and L ...


See also

* * * * *


Explanatory notes


References


Further reading

* * * Kokelaar, B. P; and Moore, I. D; 2006. ''Glencoe caldera volcano, Scotland''. . Pub. British Geological Survey, Keyworth, Nottinghamshire. There is an associated 1:25000 solid geology map. * Lipman, P; 1999. "Caldera". In Haraldur Sigurdsson, ed. ''Encyclopedia of Volcanoes''.
Academic Press Academic Press (AP) is an academic book publisher founded in 1941. It was acquired by Harcourt, Brace & World in 1969. Reed Elsevier bought Harcourt in 2000, and Academic Press is now an imprint of Elsevier. Academic Press publishes referen ...
. *


External links


USGS page on calderas

List of Caldera Volcanoes

Collection of references on collapse calderas
(43 pages)



* ttp://www.bbc.co.uk/science/horizon/1999/supervolcanoes_script.shtml Supervolcanoes
Time-lapse video of Kīlauea caldera collapse, 2018
{{Authority control Depressions (geology) Igneous rocks Volcanism Volcanic landforms .