FINAL EXAM Crustal Deformation CONVERGE DIVERGENT PLATES MANTLE PLUMES FLUX BASALTIC GRANITIC
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1 Crustal Deformation Reading: Chapter 10 Pages FINAL EXAM 8 to 10 AM, THURSDAY DEC. 6 HERE: Natural Science 101 BRING A SCAN TRON TURN IN YOUR REVIEW QUESTIONS BEFORE THE TEST, PICK UP WHEN YOU ARE DONE WITH THE TEST IF YOU WANT YOUR RESULTS, ME AND REQUEST YOUR GRADE Plate Tectonic Settings and Magma The type of magma generated in different plate tectonic settings is different DIVERGENT PLATES and MANTLE PLUMES produce magma by partial melting of mantle material due to pressure release This magma is BASALTIC (mafic) in chemical composition, and the resulting volcanism has distinct characteristics. Plate Tectonic Settings and Magma Where plates CONVERGE, water is driven off the subducting plate, and added to the overlying lithosphere This water acts as a FLUX to reduce the melting temperature, and cause hot solid rock to melt without a change in temperature The lithosphere here is continental (granitic) in character, and the magma generated is GRANITIC (felsic) in chemical composition. Ductile and brittle deformation Isoclinal folds
2 folds Mountain of folds Names of fold types syncline Tight v folds Recumbent anticline
3 Monocline San Rafael Swell monocline Plunging fold geometry Plunging fold outcrop pattern Plunging anticline Sheep mtn: doubly plunging anicline
4 Geologic map of the US Legend for Tapestry of Time and Terrain Map Valley and Ridge Province Black hills dome Drawing of Black Hills Michigan Basin
5 Small normal fault graben Normal fault formation Normal fault Small normal fault Normal faults Basin and Range Province
6 Basin and range faulting Detachment faulting Complex normal faulting East Humboldt Range Horst Owens Valley graben scarp
7 Reverse fault formation Reverse fault Thrust fault formation small thrust fault Regional thrust fault Strike-slip fault formation
8 Tectonics of Western North America San Andreas Fault System Strike slip fault Offset stream San Andreas Fault stream offset San Francisco offset
9 San Andreas Fault orchard offset Joint set in flat-lying sandstone Single joint set Joints at Moab Bryce Canyon, Utah
10 Exfoliation jointing Exfoliation dome Exfoliation joint formation Columnar joints Columnar tops Tectonic environment of Magma Draw a diagram showing the relationship of tectonic plate interaction and the location of magma formation. Indicate the chemistry of the magma likely to form.
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