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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