ENV 151 Study Guide - Quiz Guide: Volcanic Bomb, Eruption Column, Lava
13 Dec 2018
School
Department
Course
Professor
Document Summary
Chapter 9: explain how the viscosity of magma influences the explosiveness of a volcano. More viscous magmas tend to generate more explosive eruptions: list these three magmas in order from most silica rich to least silica rich, based on their compositions: mafic (basaltic), felsic (rhyolitic), intermediate (andesitic). Volcanoes with viscous magma tend to produce violent eruptions that include clouds of hot gas and ash. The blast from the eruption can also cause collapse of part of the surrounding area: describe pahoehoe and aa lava flows. Pahoehoe lava flows smoothly and sometimes generates smooth surfaces that look ropy or braided. Water vapor, carbon dioxide, nitrogen, and sulfur dioxide. Volcanic bombs are emitted as molten rock and cool after being ejected. Scoria is a basaltic pyroclastic rock that is dark and riddled with vesicles from magma gas. A crater is a small depression at the top of a volcano.
