Mount Cagua
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Cagua Volcano is a
stratovolcano A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with ...
located in the
Philippine The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...
province A province is an administrative division within a country or sovereign state, state. The term derives from the ancient Roman , which was the major territorial and administrative unit of the Roman Empire, Roman Empire's territorial possessions ou ...
of
Cagayan Cagayan ( ), officially the Province of Cagayan (; ; ; isnag language, Isnag: ''Provinsia nga Cagayan''; ivatan language, Ivatan: ''Provinsiya nu Cagayan''; ; ), is a Provinces of the Philippines, province in the Philippines located in the Cag ...
. It is one of the active volcanoes in the Philippines and has erupted twice in recorded history. Its last eruption was in 1907.


Geography

Cagua is one of the active volcanoes in the Philippines located in the
province A province is an administrative division within a country or sovereign state, state. The term derives from the ancient Roman , which was the major territorial and administrative unit of the Roman Empire, Roman Empire's territorial possessions ou ...
of
Cagayan Cagayan ( ), officially the Province of Cagayan (; ; ; isnag language, Isnag: ''Provinsia nga Cagayan''; ivatan language, Ivatan: ''Provinsiya nu Cagayan''; ; ), is a Provinces of the Philippines, province in the Philippines located in the Cag ...
in the
Cagayan Valley Cagayan Valley (; ), designated as Region II, is an Regions of the Philippines, administrative region in the Philippines. Located in the northeastern section of Luzon, it is composed of five Provinces of the Philippines, Philippine provinces: ...
Region In geography, regions, otherwise referred to as areas, zones, lands or territories, are portions of the Earth's surface that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and ...
of northern
Luzon Luzon ( , ) is the largest and most populous List of islands in the Philippines, island in the Philippines. Located in the northern portion of the List of islands of the Philippines, Philippine archipelago, it is the economic and political ce ...
in the northernmost part of the
Sierra Madre Sierra Madre (Spanish, 'mother mountain range') may refer to: Places and mountains Mexico *Sierra Madre Occidental, a mountain range in northwestern Mexico and southern Arizona *Sierra Madre Oriental, a mountain range in northeastern Mexico *S ...
mountain range. The mountain is approximately south of
Gonzaga, Cagayan Gonzaga, officially the Municipality of Gonzaga (; ) , is a municipality in the province of Cagayan, Philippines. According to the 2020 census, it had a population of 41,680. History Pre-Colonial Period and Etymology The original inhabitant ...
and south of Port Irene in
Santa Ana, Cagayan Santa Ana, officially the Municipality of Santa Ana (; ; ), is a municipality in the province of Cagayan, Philippines. In the 2020 census, it had a population of 35,688 people. History The first inhabitants of the region were Negritos and (woo ...
.


Geology

Activity of the early Pleistocene erupted
basalt Basalt (; ) is an aphanite, 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 planetary surface, surface of a terrestrial ...
ic
andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomina ...
or
effusive In physics and chemistry, effusion is the process in which a gas escapes from a container through a hole of diameter considerably smaller than the mean free path of the molecules. Such a hole is often described as a ''pinhole'' and the escape ...
basalt. The volcano was covered by enormous
lava flow Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a Natural satellite, moon onto its surface. Lava may be erupted at a volcano or through a Fissure vent, fractu ...
s from 600,000 to 300,000 years ago. It has seen activity ranging from
phreatic ''Phreatic'' is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to a type of volcanic eruption. Hydrology The term phreatic (the word originates from the Greek , meaning "well" ...
eruptions to ash flows. The volcano is topped by a wide crater marked by sharp and precipitous walls. It has six
hot spring A hot spring, hydrothermal spring, or geothermal spring is a Spring (hydrology), spring produced by the emergence of Geothermal activity, geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow ...
s. Maasok near the crater; Marafil in the northwest; Manaring, north-northeast; San Jose, north-northeast; Kabinlangan, northwest and Paminta, north-northwest."Cagua"
Philippine Institute of Volcanology and Seismology. Retrieved on September 26, 2014.


Eruptive activity

Two historical eruptions have taken place at the volcano. Activity in 1860 was a largely
phreatic eruption A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption, occurs when magma heats ground water or surface water. The extreme temperature of the magma (anywhere from ) causes near-instantaneous evap ...
though it was possibly followed by a
pyroclastic Pyroclast, Pyroclastic or Pyroclastics may refer to: Geology * Pyroclast, or airborne volcanic tephra fragments * Pyroclastic rock, rock fragments produced and ejected by explosive volcanic eruptions * Pyroclastic cone, landform of ejecta fro ...
flow. Renewed eruptions took place in October 1907 .


See also

*
List of volcanoes in the Philippines The Philippines, officially the Republic of the Philippines, is an archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of 7,641 islands, with a total area of roughly 300,000 square kilometers, which ar ...
**
List of active volcanoes in the Philippines As of 2018, the Philippines has 24 volcanoes listed as Volcano#Active, active by the Philippine Institute of Volcanology and Seismology (PHIVOLCS). Twenty-one of these have had historical eruptions. The three exceptions are Cabalian, which is a ...
**
List of potentially active volcanoes in the Philippines This is a list of potentially active volcanoes in the Philippines, as classified by the Philippine Institute of Volcanology and Seismology. List Gallery See also * List of active volcanoes in the Philippines * List of inactive volcan ...
**
List of inactive volcanoes in the Philippines This is a list of inactive volcanoes in the Philippines. Volcanoes with no record of eruptions are considered as extinct or inactive. Their physical form since their last activity has been altered by agents of weathering and erosion with the for ...
*
Philippine Institute of Volcanology and Seismology The Philippine Institute of Volcanology and Seismology (PHIVOLCS, ; ) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and ...


References


External links

* {{Volcanoes of the Philippines Stratovolcanoes of the Philippines Subduction volcanoes Volcanoes of Luzon Mountains of the Philippines Sierra Madre (Philippines) Landforms of Cagayan Active volcanoes of the Philippines Pleistocene stratovolcanoes Holocene stratovolcanoes