GEG 120 Study Guide - Midterm Guide: Metamorphism, Lithification, Aggradation
14 May 2013
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Document Summary
Concern of earth science, dominated by geology- study of the origin, history, and structure of the earth, mainly below the surface. Branch of physical geography geomorphology- study of the configuration shape or form of the landforms of the earth"s surface and their evolution. The three major rock types and their interactions. 1/4 remaining is left structuring of earth"s internal layers: diagram in the book - seismic waves. Topmost zone is solid, but contains pockets of molten rock that can reach the surface as lava. The solid uppermost mantle + crust= lithosphere (bonded together) Moho (mohorovicic discontinuity) thicker beneath continents (roots) avgs 25 mi much thinner below oceanic crust avgs 5 mi about twice as deep below continents 50 vs. 25 mi in constant motion: lithosphere can float on it. Contact zone: gradual transition not sharp break like the moho. High density - darke-colored- simatic (si&mg) -- basalt.
