10/6-10/8 Week Notes
10/6-10/8 Week Notes GEOG 221
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This 2 page Class Notes was uploaded by Kathleen Tann on Tuesday October 13, 2015. The Class Notes belongs to GEOG 221 at Kansas State University taught by Julie L. Commerford in Fall 2015. Since its upload, it has received 22 views.
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Date Created: 10/13/15
10615Lecture Notes Earth s Inner Structure Distance to center 10005 km rely on indirect evidenceseismic waves of earthquakes Inner Core solid iron with some nickel pressure keeps it solid despite high temp Outer Core iron more molten because less pressure generates 90 of magnetic field Mantle solid iron magnesium silicon oxides o Lowercooler temp and high pressure 0 Upper pressure and temp decrease forming liquid nickel Upper part of mantle is asthenosphere contain scattered zones of molten rock heated by radioactive decay Lithospherecrust Mohorovicic discontinuityboundary between crust and asthenosphere with 2 parts Oceanic crustthinner dense basalt and Continental crustgranite thicker Rocks and Minerals of Crust Mineralsnaturally substances with distinctive chemical configuration Rocksformed by 2 or more minerals o Silicone and oxygen are greatest elements Rock cycleformed destroyed and make new rocks Types Igneoussolidified by magma or lava Sedimentary Clasticformed by smaller parts Chemicalprecipitated from liquid Organicfrom once living things Metamorphicrecrystallized but stays solid 10815Lecture Notes Plate Tectonics Theory earth s crust individually moving plates Continental Drift process broke up Pangea Types of Plate Movement Passive on same crust plate neither is advancing Transformslide horizontally next to eachother Divergentmove apart rifting Convergent2 plates collide o Oceancontinentsubduction ocean crust forced down 0 Ocean oceandeep trench volcano o Continentcontinent crust fold Earthguake Processes Sudden release of tectonic stress produces shockwaves and fracture between adjacent plates Seismographmeasure magnitude Richter scale Volcano 2 Types 0 Explosive o Cindercone forms quickly after eruption small steep slope 0 Composite spreading smoke ash dangerous build over time MtSt Helens 0 Pacific Ring of fire volcanic arc follows outline of pacific plate EffusiveFluid eruptions o Sheildshallow sloping sides Hotspotsarea of geothermal activity Hawaiioceanic hotspot Yellowstonecontinentalhotspot
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