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Volcanoes Of Portugal
Although there are no active volcanoes in the continental territory of Portugal, apart from geological remnants of ancient volcanism, the Portuguese Atlantic island possessions have a long history of active volcanism. The following is a list of active and extinct volcanoes in the Portuguese territories of the Azores and Madeira. Azores Madeira See also Geology of Madeira References ;Sources * * * {{GeoGroup Volcanoes of Portugal, * Lists of volcanoes, Portugal Lists of landforms of Portugal, Volcanoes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is stretching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graciosa Island
Graciosa Island () (literally "graceful" or "enchanting" in Portuguese), also referred to as the ''White Island'', is a volcanic island in the Atlantic Ocean. It is the northernmost of the Central Group of islands in the Azores archipelago. The ovular Portuguese island has an area of , a length of and a width of . Its landscape is dominated by a central caldera (the Caldeira) located in the southeast. History In addition to the other islands of the Central Group, Graciosa was explored by Portuguese navigators during the first quarter of the 15th century, although there exist no accounts of the first sighting of the island. May 2, 1450 has frequently been referred to as the date of the island's "discovery", although there exists no documentation to support this date. Paradoxically, it is clear that in 1440, by order of Prince Henry the Navigator, cattle and swine were settled on the island in order to facilitate colonization. Similarly, it is unclear the names of the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Madeira
Madeira began to form more than 100 million years ago in the Early Cretaceous, although most of the island has formed in the last 66 million years of the Cenozoic, particularly in the Miocene and Pliocene. The island is an example of hotspot volcanism, with mainly mafic volcanic and igneous rocks, together with smaller deposits of limestone, lignite and other sediments that record its long-running uplift. Stratigraphy, tectonics and geologic history During the Early Cretaceous, massive sedimentation offshore of Africa built up enough stress on the crust to prompt fissuring and fracturing. Magma ascended to the surface and submarine eruptions began. By the Late Oligocene or Early Miocene, successive undersea eruptions throughout the early Cenozoic had built up enough material for the Madeira archipelago to appear above sea level. The rapid uplift of the island is recorded with offshore limestone deposits, leftover from coral reefs as well as onshore limestone up to 400 meters above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pico Das Torres
Pico das Torres is the second highest peak on the Atlantic island of Madeira, Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ....">talk:Pico Ruivo">Madeira Islands Travel Guide It lies roughly midway between the Pico Ruivo and Pico do Arieiro at an elevation of and is only accessible from the trail between these two peaks. References Mountains of Portugal, Torres Landforms of Madeira One-thousanders of Portugal, Torres {{Madeira-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pico Ruivo
Pico Ruivo () is the highest peak on Madeira Island and the third highest in Portugal, standing at in the Santana municipality. Accessible only by foot, it can be reached from either Pico do Areeiro or via a shorter, easier trail from Achada do Teixeira. The summit provides panoramic views of the island, from the green mountains surrounding Curral das Freiras to the Ribeira Grande and São Jorge valleys. On days with clear visibility, Pico Ruivo also offers sweeping views of Porto Santo Island and the Desertas Islands. While the breathtaking vistas are a highlight, the unpredictable weather can make the hike challenging and at times dangerous. North of the peak, a shelter, renovated in 2019, offers essential amenities such as running water, restrooms, and meal services for hikers. As the highest point in the archipelago, Pico Ruivo is primarily surrounded by high-altitude heath. The area is also marked by monumental rock formations, which often rise above the clouds, domin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pico Do Arieiro
Pico do Areeiro (), at high is a mountain located on the Portugal, Portuguese island and autonomous region of Madeira, the third highest on the island. Situated within the mountainous interior of the island roughly halfway between the northern and southern coasts. It is a popular year round tourist attraction with the summit accessible by road directly from Funchal. On a clear day it is possible to see the neighboring island of Porto Santo Island, Porto Santo, to the northeast. The summit is used as a starting point for hikers heading to Pico Ruivo (the highest point in Madeira) and at peak times up to 1000 people a day can pass by the area. The peak has in recent times become popular with cyclists making the ascent from Funchal. Many cycling publications and online lists usually claim that the climb from sea level to the summit at Areeiro is one of the toughest in the world with 1810 meters of climbing over a very short distance of 22 kilometres. There is easy road access t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urzelina (volcano)
Urzelina is a civil parish in the municipality of Velas in the Portuguese islands of the Azores. The population in 2011 was 902, in an area of 13.69 km². It is situated near the south coast of the island of São Jorge. It is alternately known as São Mateus, to which the parish was named after its patron saint. History The first settlers reached this coast in the 15th century, but were isolated from Faial. Many of the early homes were built along the coast, on lowlands and flanks of the interior mountain range, interspersed in the forests. The parish received its name owing to the abundance of ''urzela'' (Roccella tinctoria) found by the first explorers and settlers, along its coastal clifftops and which later became a source of an export market, because it was used in dying. Urzela, a species of fungus, was harvested and exported to Flanders and England in the early 15th-16th centuries, thereby supporting the economies of the island, in addition to many of the islands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lajes Do Pico
Lajes do Pico () is a town and municipality in the central Azores. It is one of three municipalities of the island of Pico. It has 4,342 inhabitants as of 2021, in an area of 155.31 km2. It is bordered by Madalena to the west and by São Roque do Pico to the north. History The first settlement to be established on the southern part of the island of along Penedo Negro, in the cove of Castelete (south of the actual town of Lajes) sometime around 1460. The rough seas at the time only allowed the navigator Fernando Álvares Evangelho to offload at the time, and he and his dog would occupy the land near the ravine (along the western edge of the town) for many years: the ravine of potable water took its name ''Ribeira Fernado Álvares'' from this early colonist. His former residence still remains near the site. When his colleagues arrived later, they disembarked farther east in the area designated ''Santa Cruz das Ribeiras''. A few remain at this site, including Jordão Álvares ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topo Volcano
Topo Volcano (Portuguese language, Portuguese: ) is an inactive shield volcano located on Pico Island, Azores. The volcano measures in height and occupies the southernmost area of the island. It is part of the Lajes (or Topo) Volcanic Complex, the oldest volcanic apparatus which gave origin to the island, around 300,000 years ago. The volcano was created by a thick superposition of alternated Pāhoehoe lava flows and thin layers (10%) of pyroclastic material. Its land area is approximately but its total area, accounting for the sea floor and the area that gave rise to the Achada Plateau, is estimated to be around . References Mountains of Portugal Volcanoes of Portugal Pico Island One-thousanders of Portugal Geology of the Azores Polygenetic shield volcanoes {{Volcanology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabrina Island (Azores)
Sabrina Island () was an islet formed during the months of June and July 1811 by a submarine volcanic eruption off the coast of Ponta da Ferraria, São Miguel Island, Azores The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atl .... The first person to land on the island was Commander James Tillard, captain of the British warship , who hoisted the Union Jack on the island and claimed sovereignty for Kingdom of Great Britain, Great Britain. A diplomatic row with Portugal over the issue ensued, which the island's sinking back into the sea rendered moot. History Formation and discovery Between January and February 1811 a prolonged period of seismic activity affected the settlements to the extreme southwest of São Miguel, in particular in the parishes of Ginetes and Mosteiros (Ponta Delgad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monaco Bank (volcano)
Monaco Bank is a submarine volcano in the Azores The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atl ..., which last erupted in 1911. See also * List of volcanoes in Azores References Seamounts of the Atlantic Ocean Active volcanoes {{Marine-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldeira Volcano
The Caldeira Volcano ( Portuguese: ) is the highest mountain, massive stratovolcano and the largest geomorphological structure that forms the island of Faial. The mountain's highest point, Cabeço Gordo, reaches above sea level. One of the most notable features of this volcano is its two kilometer wide caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the str ..., that is in depth below the crater rim. History Along the western edge of the Ribeirinha Volcano, the Central Volcanic Complex formed about 410,000 years ago, along with several structures that arose from tectonics. Evidence of this process has not been preserved due to subsidence, but it is generally believed that two formations (an Upper and Lower group) reflecting a geochemical variation that occurred about 16,000 ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
