[GEO 305] - Final Exam Guide - Comprehensive Notes for the exam (51 pages long!)
Document Summary
Chapter 12: earth"s internal structure, rock cycle, and geologic time: earth"s inner structure, 1. Continental crust= felsic + mafic rock zones c. iii. Crust: lithosphere and asthenosphere, lithosphere: rigid outer shell of earth includes crust and upper mantle, asthenosphere: plastic layer below the lithosphere. Lower mantle: cooler temperature, intense pressure causes to be solid b. ii. Upper mantle: pressure and temperature lessen, gradually forming viscous nickel: asthenosphere: the upper part of the upper mantle, earth"s crust, 2 parts: a. i. Continental crust: thicker but less dense mostly granite a. ii. Oceanic crust: thinner but more dense mostly basalt a. iii. Mohorovic discontinuity: the boundary b/w the crust and asthenosphere. Sodium (2. 8%) , potassium (2. 6%) , magnesium (2. 1 %: minerals: naturally occurring inorganic substances, rocks: usually composed of 2 or more minerals, 3 classes: 1. Igneous rocks: rocks formed from the cooling of magma b. Chemically precipitated: solid inorganic mineral compounds formed by chemical precipitation from water solutions or formed by organisms in water b. iii.
