PHSC 1002 Study Guide - Midterm Guide: Radiometric Dating, Transverse Wave, Cambrian Explosion
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Silicates __ ferromagnesian (fe and/or mg): nonferromagnesian (neither fe nor mg) - >50% of earth"s crust. Nonsilicates (8% of earth"s crust) __ carbonates (most abundant), sulfates and halides nonmetallic ___oxides and sulfides metallic: Minerals form through crystallization:__magma becomes depleted of minerals as they crystallize __water becomes more concentrated of minerals as evaporates. First minerals to crystallize are those with high melting points and low silica [ vice versa ] Carbonates: composed mostly of calcium carbonate (precipitated inorganically or biologically) Evaporites: precipitation of seawater or salty lakes________low solubility minerals precipitate first [ vice versa ] Igneous cooling and crystallization of magma or lava_sedimentary preexisting rocks subjected to weathering and erosion_metamorphic formed from preexisting rock transformed by heat, psi, and chemical fluids. Body waves can travel in every direction in the earth. P waves: longitudinal wave, fast_________s waves: transverse wave, slower, only through solids. Surface waves travel only on the surface on the earth.
