GEOG 101 Study Guide - Final Guide: Extrusive Rock, Biome, Tectonic Uplift
16 Sep 2016
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Geologic time scale- the time earth formed through present day. Core- 900 miles, a solid ball made up of mostly iron and nickel. Mantle- the second layer of earth about 1,800 miles thick created of a thick, rocky substance. Crust- the first layer of earth about 10 miles thick created of rock and loose materials. Lithosphere- combination of crust and upper part of the mantle. Igneous- formed through the cooling and solidification of magma or lava. Sedimentary- rock that has formed through the deposition and solidification of sediment (i. e. limestone) Metamorphic- rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase (i. e. limestone and slate) Alfred wegener- german scientist who in 1915 proposed a theory about the earth"s continents - they were all once joined in a large, single land mass.
