GEOG 1290 Lecture Notes - Lecture 30: Dense-Rock Equivalent, Magma Chamber, Mount Pinatubo
29 Nov 2014
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Document Summary
Roughly circular depressions resulting from explosion and subsidence of a larger volcano. Prominent spear that rises out last eruption, solidified in pipe, throat to volcano. Eruption that is orders of magnitude greater than any volcano in history. Volcanic gases: co2, sulfur dioxide contribute to acid rain, destroying local. Lava flows: not always fast, can be slow. Pyroclastic flows: consistency of concrete, nevado del ruiz (columbia) lehar killed 23,000 people when the city of. Armero was buried under 5 m of mud. Batholiths: subterranean igneous body, huge size and depth (>100km, cores of mountain ranges. Laccoliths: magma forced between layers of rock, mushroom shaped mass my form rounded hill. Veins: vertical sheets of magma thrust into rock, magma forced between parallel layers of rock, magma forced into small fractures in rock. Bending of rocks by lateral compression and/or uplift. Syncline: down fold: an upfold (pushed from one side) that has a reverse orientation on the other side.
