Exam Review Notes + Week 11 Notes
Exam Review Notes + Week 11 Notes GEOS 1300
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This 0 page Class Notes was uploaded by Erin Malone on Tuesday March 22, 2016. The Class Notes belongs to GEOS 1300 at Western Michigan University taught by Kaczmarek in Winter 2016. Since its upload, it has received 25 views. For similar materials see Physical Geology in Geology at Western Michigan University.
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Date Created: 03/22/16
WNQMPP P 10 Volcanic rocks are anthetic Plutonic rocks are phanetic 12 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Week 11 Notes Mar 14th16th Exam Review NotesKey Points SI Unit Conversion 265gcm3 X 1 kg1000g 265kg1000cm3 X 100cm1m3 265kg1000cm3 X 1000000cm31m3 2650000kg1000m3 2650kgm3 Scientific Fact is a repeatable or verifiable observation or test result Scientific Theory is a testable or falsifiable explanation of how nature works Unstable isotopes relatively radioactive isotopes are used to absolute age date the Earth Type of bonds broken to cause calcite to effervesce fizz is HCl covalent Divergent plates move away from one another Lithosphere rigid rest upon the weaker ductile rock of the asthenosphere SI Unit Conversion Density massvolume 113gcm3 m 45 X 52 X 60 m 45cm X 52cm X 60cm 113gcm3 1404cm3 X 113 gcm3 158652g a 113gcm3 158652g1404cm3 Chemical composition of magma determines What minerals can form Oceanic crust is sub ducted and Continental crust is not Silicate minerals make up most of Earth s crust and upper mantle most prevalant minerals in igneous rocks Friction is not a form of heat transfer Silicate content determines igneous rock stage Continental crust is mainly composed of granite Felsic oceanic crust Dissolved gases present in magma because gases escape once magma hits earth s surface Magma that forms in come from partial melting of the mantle and crust Process impact composition of magma partial melting fractional crystallization assimilation miXing How does pressure in uence melting points of different minerals more pressure higher melting points Decomposition melting Felsic minerals have lower melting temperature than mafic minerals Metamorphic changes Volcanoes are near both divergent and convergent plates Stress normal burial conditions Earth s interior structure Geologic Time Scale Absolute and Relative 27 28 29 30 Shadow zones P and S waves Geology is the scientific study Parent isotopes and Daughter isotopes half lives Cement different sediments in sedimentary rocks March 16th Notes Magma Ocean Theory 0 Gravity is holding the Earth together 0 Heat from I Radioactive decay I Planetesimal bombardment Primordial amp Radiogenic Heat Core Mantle Differentiation 0 Fractional Crystallization O Gravity O Immiscibility Concentric layering is based on density immiscibility Oceanic Crust Formation O Mantle IMagma Residual Rock lherzolite lbasalt gabbro harzborgite Continental Crust Formation 0 More complicated than Oceanic Crust 0 2 hypotheses I Hydration melting of mantle at subduction zones then fractional crystallization to yield felsic magmas I Partial melting of oceanic crust came from mantle early on in Earth s history Both suggest oceanic crust formed 1st Mantle is ultimate sources of material Timing of Continental Crust o 44 Ga Detrital