EARTH 205 Study Guide - Midterm Guide: Oceanic Trench, Gypsum, Cascade Volcanoes
21 Mar 2017
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Volcanoes occur at plate boundaries, especially subduction zones. Lithosphere is above asthenosphere which is above hotspots in the earth"s layers. Order of earth"s layers (outside to inner) Most prevalent in andes mountains in south america. Made of sio2 + al + k + na + fe + mg + oxides. Made of sio2 + al + fe + mg + oxides. Dominant rock in the upper part of the earth"s mantle. Extrusive: form when magma reaches the earth"s surface and cools quickly. Intrusive: form when magma cools slowly below earth"s surface. Common at the carbonate platform/basin of lake michigan. Common at the dolomites in italy (mountains) One of the tetrahedrons in limestone is sio4 (most abundant in earth) Carbonate mineral/rock family is common in many near-surface environments. Made of dolomite (camg(co3)2) and calcite (caco3) Calcite is very commonly found in water atmospheric co2 dissolves in raindrops then is in rock chemical weathering reactions carried away in streams as carbonate iron.
