* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Volcanoes - sabresocials.com
Mono–Inyo Craters wikipedia , lookup
Llullaillaco wikipedia , lookup
Olympus Mons wikipedia , lookup
Volcano (1997 film) wikipedia , lookup
Large igneous province wikipedia , lookup
Mount Rainier wikipedia , lookup
Level Mountain wikipedia , lookup
Mount Garibaldi wikipedia , lookup
Mount Pinatubo wikipedia , lookup
Itcha Range wikipedia , lookup
Craters of the Moon National Monument and Preserve wikipedia , lookup
Mount Pleasant Caldera wikipedia , lookup
Mount Meager massif wikipedia , lookup
Lascar (volcano) wikipedia , lookup
Nevado del Ruiz wikipedia , lookup
Cerro Blanco (volcano) wikipedia , lookup
Volcanology of Io wikipedia , lookup
Mount Vesuvius wikipedia , lookup
Mount Edziza volcanic complex wikipedia , lookup
Shield volcano wikipedia , lookup
Potrillo volcanic field wikipedia , lookup
Wells Gray-Clearwater volcanic field wikipedia , lookup
Cerro Azul (Chile volcano) wikipedia , lookup
Silverthrone Caldera wikipedia , lookup
Cascade Volcanoes wikipedia , lookup
VOLCANOES Mount Fuji Mauna Loa Volcanic Landforms Key concepts: Volcanic landforms vary with - tectonic setting, - composition of magma -------- conditions during eruption, - volume of eruption. Types • • • • Shield Composite Fissure Cinder ShieldVolcanoes large volcanoes with broad summit areas and low-sloping sides - low viscosity basaltic lava flows. - A good example of a shield volcano is the Island of Hawaii (the "Big Island"). Composite Volcanoes -built by multiple eruptions, sometimes recurring over hundreds of thousands of years, sometimes over a few hundred. -Andesite magma, the most common but not the only magma type, tends to form composite cones. - built mostly of fragmental debris, - with a structural framework of dikes and sills that knits together the voluminous accumulation of volcanic rubble.. -Composite cones can grow to such heights that their slopes become unstable. Mayon Mount Rainier Mount Fuji Cinder cones Cinder cones are mounds of basaltic fragments. Streaming gases carry liquid lava blombs into the atmosphere that rain back to earth around the vent to form a cone. Calderas are circular to oblong depressions formed by collapse of the central vent during the extrusion of pyroclastic materials. Their diameters are many times larger than those of associated vents. Domes Lava domes form by the slow extrusion of highly viscous silica-rich magma Domes can be solitary volcanoes, form in clusters, grow in craters or along the flanks of composite cones. A dome has been growing slowly within the crater of Mount St. Helens since the eruption of 1980. Domes have also filled the crater of Mt. Pelée, Martinique, etc. List of Volcanic Hazards Pyroclastic Density Currents (pyroclastic flows and surges) Structural Collapse: Debris flowAvalanches Dome Collapse and the formation of pyroclastic flows and surges Lava flows Tephra fall and ballistic projectiles Volcanic gas Tsunamis Mount St Helens 1980