GEOL 1001 : Study Guide Test 1
Document Summary
It and uppermost mantle and forms earths" cool down to depth of 660 km (410 miles). Divided into 3 parts: upper mantle: extends from the crust-mantle boundary, lithosphere: (100 km) consists of entire crust rigid outer shell. 14 times the density of water: outer core: liquid layer 2270 km thick. S waves are typically slow: basic rock cycle, igneous: form when molten rock (magma) cools and solidifies. Magma is melted rock that can form at various levels deep in the earths crust. (eg: granite, basalt) hard rocks: sedimentary: accumulate in layers at earth"s surface. They are materials derived from preexisting rocks by the process of weathering. (sandstone limestone) soft rocks: metamorphic: produced from preexisting igneous, sedimentary, or even other metamorphic rocks. Most changes occur at elevated temperatures and pressures that exist deep i earth"s crust and upper mantle. Caused by pressure without melting. (marble and gneiss)
