EARTHSC 2GG3 Lecture Notes - Lecture 5: Tephra, Basalt, Subduction
19 Jan 2019
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Document Summary
Maars and ice contact volcanos: the violent interaction of magma and groundwater produces maars, roughly circular volcanic craters commonly filled with water. Ice contact volcanos: erupt beneath or against glaciers, subglacial volcanoes erupt, rapidly melting ice and produce huge floods known as. Volcanic features: hot springs, hot rocks heat groundwater that discharge at the surface, geysers, groundwater boils in an underground chamber erupting steam at the surface. Volcanic features: resurgent calderas and super eruptions, very rare but extremely violent eruptions from super volcanos, produce huge amount of ash and form calderas, most recent north american caldera eruption were yellowstone national park. State: an eruption could spread ash over vancouver.
