Tectonic Plate Boundaries

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Presentation transcript:

Tectonic Plate Boundaries http://www.classzone.com/books/earth_science/terc/content/visualizations/es0804/es0804page01.cfm?chapter_no=visualization

Continental-Continental Convergent 2 continental plates meet Push up b/c have = densities Form mountains Himalayas (home of Mt. Everest), Asia  5.5 miles above sea level!

Continental-Continental Divergent 2 continental plates spread apart Magma rises to fill in gap Forms new land masses & oceans East African Rift, Africa

Oceanic-Oceanic Convergent 2 oceanic crusts meet 1 gets subducted Form trenches and volcanoes (typically island arcs) Aleutian Islands (Island arc) near Alaska Marianas Trench (6.8 mi deep) Pacific Ocean near Japan

Oceanic-Oceanic Divergent 1963-1967, 1 sq mi, 2002 .5 sq mi 2 oceanic plates are separating S Forms mountains, islands, volcanoes Iceland & Surtsey (off Iceland) Eurasian plate moves East N. Amer plate moves West 1980 Krafla Volcano, 1975-1984 7m of movement opened fissures for magma to rise

Oceanic-Continental Convergent Oceanic and continental plate meet Oceanic gets subducted Forms: mountains, trenches, volcanoes Andes Mts, Peru

Transform Where crust/rock is neither created nor destroyed Plates slide past each other San Andreas Fault California