Plate Techtonics

Plate Techtonics - «Stigmata waves mx us wWfi a“ more...

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Unformatted text preview: «Stigmata waves. mx us wWfi a“ more We eating import: +9 melfi'eof‘fieg Plate Tectonics (Chapter 2.) what are the important characteristics of Earth’s interior 30% layers (size, composition, strength, etc.)? inner core & outer core mantle -S/Lo oi? earlAn‘s volume, "Fe ,Mcj Silicaer mimCro\S ‘Sohd oceanic crust &_ continental crust mama minerals aimed-e rich —so\iol .C. CCmE-a‘k— \S finches" -D- C(‘MSEC II S ’H/{uflfief amd \QSS KM) lithosphere ru’ 0 { C0|d,5+ronoj: average 10 Km 4%er asthenosphere _ her @30th cows mow SQMCD Querage “100 KW" JVMKQK Hole: GEOS 2104 Study Aid B—l Plate Tectonics describe global patterns of: earthquakes: (where ?) http ://www .iris .edu/seismon/ volcanoes: (where?) “Pagan. ms at are," mid-ocean ridges (what are they & where?) ocean trenches (what are they & where?) What is PLATE TECTONICS? ' Explaing +lAe. movememtg Cb“: (glad—£5 what is a plate? what part of the Earth? ’li’l’hosphefi‘e) moving an hag k Huang“;ka how fast? , .I ems 99;“ \[em‘ (m llang ag \nqrr/ new 3 grow) compare to continental drift: Cénhhe—W‘FS owe moving Hole: GEOS 2104 Study Aid B—2 Plate Tectonics plate boundaries: types? What happens at each? where in plate tectonics does extension occur? Dlueffienlf loot/molar»? seafloor spreading é—~ a where in plate tectonics does compression occur? WW5 Cmi‘ (Sound‘er '________. subgfiiflggfiifi pin/6,8 \oaLl’x MJFD We W‘O‘m‘fle’ (Lofivfirge‘fll') 4—H collision Two @Mes coma %83Hner Lounelqmg ...—.._.3.€___‘_ Where does boundary-parallel motion occur? transform fault—Tm: plates shale maxi it; CQQHOJrMeF .—-———‘§ gee-J Hole: GEOS 2104 Study Aid B—3 Plate Tectonics relate patterns from 2 pages ago to plate tectonics mid-ocean ridges: earthquakes: volcanoes: mountain belts: what drives plate tectonics? (why do the plates move?) mantle convection 1Asz flcxpcmd -'"> “89 caol A SMrQnK 4» SI;an asoh‘d mwfirle Howsfipvxueds) UE.{\1 s\ow\\t heat engine Hole: GEOS 2104 Study Aid B—4 Plate Tectonics Evidence for Plate Tectonics (listed in approx. historic order) 1600-1900 shape of continents across oceans (Africa-S.America) 1910’s similar geologic features across some oceans mountains, rocks, fossils, paleo-climate (Atlantic) continental drift proposed and rejected “9 ammcaln hock’mu r\ Ham'fihetq (Obu‘xo u“: cu'x Mth 1930’s gravity at ocean trenches indicates active pulldown I hud— c: t O m. h i o \ \ mantle convection proposed “‘1 °"“ “ 3 38”" WW" " 5% °5 l ‘2 {gnu-Kati [M55 “A 1950’s vseafloor topography mid-ocean ridges, deep ocean trenches large fractures offset the ridges ~Very thin sediments in deep oceans ~ocean crust much thinner than continental ~“Wadati-Benioff zone” earthquakes: earthquakes shallow at trenches and get deeper inland ‘paleomagnetic “polar wandering” Mmfizjmr ~rocks can record magnetic field when they form -different continents’ N pole at different places in past seafloor spreading & expanding earth proposed and rejected retwred om weanling aorw as we“ we? mumd mew 436* mqstc‘lrtwj continued... Hole: GEOS 2104 Study Aid B—5 Plate Tectonics Evidence for Plate Tectonics (listed in approx. historic order) ...continued 1960’s paleomagnetic stripes ~paleomagnetic N-S reversals, dated around world symmetric magnetic reversal pattern across ridges eafloor sampling and dating: near-zero age at mid-ocean ridge; gets older with distance from ridge seafloor spreading accepted (879Wat "J" 'earthquake mechanisms (rock movement directions) 29:554- 20“ compression at Benioff zones deft/right lateral motions at ocean fracture zones garthquakes indicate cold material at Benioff zones transform faults & subduction accepted lobal earthquakes clustered at plate boundaries ountain-building and continental geology better explained by new ideas mm VL 0361 T?” o xv O Ragwea a scientific revolution W plate tectonics: a new theory, new paradigm 1N3 drying) far-c9. 8!; JHAG Wane} eaerVx a ear-Vh 0x Puttje) Hole: GEOS 2104 Study Aid B—6 Plate Tectonics terms used in science... 0:39 fact, data: objectively measurable M hypothesis, model: a proposed explanation of data; makes predictions that are @2133; should be ow ul, simple theory: a hypothesis afEr thorough te/sgg law: a fundamental, universal, thoroughly tested theory paradigm: a “standard” way of thinking in the science paradigms change through a revolutionary new theory e . g . , relativity, evolution, plate tectonics Hole: GEOS 2104 Study Aid B—7 Plate Tectonics what happens at a seafloor spreading center? (and make a simple drawing) Volcano (.5 i “fl-1M I Noam“ L.’<\m‘=~?\"“e’ ,5“ 9/ -—-‘§> Hair Askew!“ ?fi$€( kit; r006. mover. wrubrd‘ u raw-‘0 \ [‘OLUK AQWmsphem what happens at a subduction zone? (and make a simple drawing) (consider ocean-ocean and continent-ocean) ‘n % earlhiuaueS 0.1.60“ — 0.213% happen 0—H ‘3‘. 3 gun —mw3finm3fl‘ Kooks 4M6 Sam/HZ: \aw‘r more. Fressme, bdflflgfi LOW“ dwim‘+ VM *- Lo move; Exp/\- l . ‘ Lewinmmi ofCS " Mme is ” Son/duh Mas“ U LIWaspmefi‘l a.____.—-—--""""—'\-.__________H‘ AerMengw‘c *- Hole: GEOS 2104 Study Aid B—8 Plate Tectonics what happens at a continent-continent collision zone? (and make a simple drawing) what happens at a transform fault? (and make a simple drawing) F EJS‘KYH&LM< RES Wm of 1X31-EV‘S" W gme‘oCS—se P 00 wu’d 4209 ClL V‘ Ila‘be‘r _ 3 56M Prmv’ks‘cus Sim/33V - Decal Sea a NOW“ Momma two: timer) Hole: GEOS 2104 Study Aid B—9 Plate Tectonics what happens as plates move through geologic time? What was Pangaea? \JMefi 0xe 3AM: CDWMHvfirS Were. 5%“ dose/“"6 \\ H Super (Lemme/W 2010 mflh’bm \lcc‘rg Q36 how is the age of crust distributed in North America? - rat-MS j"\ 44m: middle O‘C‘ N_A,) \loumg pod/xi» (mos—R'le Co\Kigbmsl ow Rake oudrgx'des formation of the western North America mountains (North American Cordillera) “MW 100 m;\\£b\n \Juws (.150 5&4“ mclénle *1“in gimamr Qrvofi'aé formation of the Appalachians — \slomcl arc, (,Q‘I.\;dte,a. £4513 )w mill'om wears MP and 35/0 vm‘dian w: hrs t _ _ O ‘ Ia‘imcflx genial“ 310 mflham ~10“? milhm \[BM ‘19 Hole: GEOS 2104 Study Aid B—lO Plate Tectonics ...
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Plate Techtonics - «Stigmata waves mx us wWfi a“ more...

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