GLG 101- Final Exam Guide - Comprehensive Notes for the exam ( 40 pages long!)
Document Summary
Two oceanic plates move toward each other: includes trenches, islands in an arc shape, one plate moves= subduction, ocean-continent convergent boundary. Includes trenches, mountain chains near the edge of continent: continent-continent. Mountain chain not on the edge of the continent. Divergent boundaries: ocean-divergent: floor spreads apart, high ridges on ocean floor, rift zone, forms new oceanic crust, continent-divergent: two continents rifting apart, usually very volcanically active, basin. Gabbro: refers to a large group of dark, often phaneritic, mafic intrusive igneous rocks chemically equivalent to basalt. It forms when molten magma is trapped beneath the earth"s surface and slowly cools into a holocrystalline mass. Granite: is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy. Obsidian: is a naturally occurring volcanic glass formed as an extrusive igneous rock.
