CONTINENTAL DRIFT Supercontinent 200 m.y.a. PLATE …brownk/ES104/ES104.2011.1027.PlateTec.pdf1...
Transcript of CONTINENTAL DRIFT Supercontinent 200 m.y.a. PLATE …brownk/ES104/ES104.2011.1027.PlateTec.pdf1...
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CONTINENTAL DRIFT AND PLATE TECTONICS
Supercontinent 200 m.y.a.
Shelf fit of southern continents
Mesosaurus occurrences
Other fossil locations
• http://www.mu.edu/classes/day/images/PlateTechtonics/fossils.gif
Structure across ocean
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Structure matched Occurrence of Southern Glaciation
Match of Southern Glaciation
Climate distribution
• http://www.mu.edu/classes/day/images/PlateTechtonics/climatezones.htm
Change in pole position
• http://www.mu.edu/classes/day/images/PlateTechtonics/climatezones.htm
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Climatic change with drifting
• http://www.geol.umd.edu/~piccoli/100/ch9_2.htm
Supercontinent 200 m.y.a.
• http://terra.chemeketa.edu/Faculty/fraa/geology/topics/tectonics/photos/htmls/world-sea-floor2.html • http://terra.chemeketa.edu/Faculty/fraa/geology/topics/tectonics/photos/htmls/pacific-sea-floor.html
• http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_quakes_world_990707_flat.html
Lithospheric Plates
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Earth’s structure
Earth’s outer shell
Relationship of crust, lithosphere and asthenosphere
• http://earth.geol.ksu.edu/sgao/g100/plots/0829_12_litho.jpg
Two types of crust
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Active Volcanoes
http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_world.html
Three types of plate boundaries
http://earth.geol.ksu.edu/sgao/g100/plots/0829_3boundaries.jpg
Diverving plate summary Diverging Plates
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Icelandic Rift
http://earth.geol.ksu.edu/sgao/g100/plots/0829_09_iceland.jpg
Transform Boundary
TRANSFORM FAULTS
Transform Fault Boundary San Andreas Transform Fault
http://earth.geol.ksu.edu/sgao/g100/plots/0829_11_saf_photo.jpg
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Three types of convergent margins
http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpg
Peru-Chile Trench
http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpg
Ocean-Continent Convergence
http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_cascades.html
Ocean-Ocean Convergence Japan Trench
Volcanic arc matures into complex small continental crust fragments over time
http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpg
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Location of Pacific Trenches India-Asia before collision
Himalayas as a result of collision Continent-Continent Convergence
(Yes, I know the words are backward. It’s so the suture and subduction angles match the other illustrations)
Indian Plate Movement Himalayan Suture
http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpg
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Summary of types of convergent plate margins Ocean continent
Ocean ocean
Continent continent
Juan de Fuca Plate
SEA-FLOOR SPREADING AND PLATE BOUNDARIES
Juan de Fuca Plate
http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_juan_de_fuca_ridge.html
Age of Emperor Seamount Chain
Velocities of Plates
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Radio Telescope Plate Map
Animation link http://www-personal.umich.edu/~vdpluijm/plates.gif
http://www.ucmp.berkeley.edu/geology/tectonics.html
Dynamo that creates magnetic field
http://www.nasa.gov/vision/earth/lookingatearth/29dec_magneticfield.html
Magnetic Reversals in volcanic stratigraphy
Magnetic Reversal Age Scale
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Magnetic Anomalieson sea floor
Lava Magnetized in Normal Field
Lava Magnetized in reversed field Sea floor spreading documented by magnetic reversals
Magne-tometer Survey
Age of Sea Floor
http://earth.geol.ksu.edu/sgao/g100/plots/0829_04_age_of_ocean_floor.jpg