|
Láscar
Lascar is a stratovolcano in Chile within the Central Volcanic Zone of the Andes, a volcanic arc that spans Peru, Bolivia, Argentina and Chile. It is the most active volcano in the region, with records of eruptions going back to 1848. It is composed of two separate cones with several summit craters. The westernmost Volcanic crater, crater of the eastern cone is presently active. Volcanic activity is characterized by constant release of volcanic gas and occasional vulcanian eruptions. Lascar has been active since at least 56,000 years ago, though some argue for activity beginning 220,000 years ago. The first known activity occurred at the eastern cone and was characterized by lava flows, before shifting to the western cone where lava domes were emplaced. An eruption event known as Piedras Grandes was followed by the large Soncor eruption. A new western edifice was constructed on top of the Soncor vent, during the Holocene activity then shifted again to the eastern edifice and co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Pacana
La Pacana is a Miocene age caldera in northern Chile's Antofagasta Region. Part of the Central Volcanic Zone of the Andes, it is part of the Altiplano–Puna volcanic complex, Altiplano-Puna volcanic complex, a major caldera and silicic ignimbrite volcanic field. This volcanic field is located in remote regions at the Zapaleri tripoint between Chile, Bolivia and Argentina. La Pacana along with other regional volcanoes was formed by the subduction of the Nazca Plate beneath the South American Plate in the Peru–Chile Trench, Peru-Chile Trench. La Pacana is situated in a basement (geology), basement formed by various Paleozoic Geological formation, formations and Tertiary ignimbrites and volcanoes. Several major fault (geology), faults cross the region at La Pacana and have influenced its volcanic activity. La Pacana is a supervolcano and is responsible for the eruption of the giant Atana ignimbrite, which reaches a volume of and constitutes the List of largest volcanic eruption ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
