2011-2-16-StructureReview

2011-2-16-StructureReview - Structural St t l Geology...

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Structural eology Geology Overview 2
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Tectonic Plates (with plate velocities and faults) 3
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arthquakes Earthquakes Magnitude > 3.5 4
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arthquakes Earthquakes Magnitude > 3.5 5
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Plate Boundary Types • divergent (rift) = normal fault (Mid- tlantic Ridge East Africa Rift ) Atlantic Ridge, East Africa Rift, . ..) • convergent (subduction zone) = thrust fault (Himalaya Mtns, Aleutian lands Java Trench Peru hile Islands, Java Trench, Peru-Chile Trench, . ..) • transform = strike-slip fault (San ndreas Fault Alpine fault Andreas Fault, Alpine fault, Caribbean Plate-Haiti. .) 6
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Divergent Plate Boundary • horizontal stretching of ust crust • subsidence, shallow ocean, salt/evaporite formation treme extension brings extreme extension brings mantle to surface, creates ew ocean basin new ocean basin • failed rifts create large 7 sedimentary basins
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Convergent Boundary (3 types) • one plate (subducting slab) slides under another descending into the asthenosphere bducting plate melts =>magmarisestoform
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2011-2-16-StructureReview - Structural St t l Geology...

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