Unformatted text preview: • SEE DIAGRAM • Plates are not always exclusively continental or oceanic, some plates can be both ** • Olduvai Gorge—important because it is where some early discovered were made • Lucy • The Atlantic and Indian Ocean Floor Niger Failed Rift Arm (aulochogene) • Intra-Plate Earthquakes-Rare by sometimes large o New Madrid, MO –three large eqs. (M7-7.5) Winter of 1811-1812 o *1811 and 1812 THREE large earthquakes • Convergent Margins:-Usually one plate slides underneath the other = subduction -Notice Wadati-Benioff Zone SEE DIAGRAM o Deepest Eqs in the world are associated with subduction zones, and they go deep as 670 km deep earthquakes different than surface earthquakes. o Different from San Andreas earthquakes o Earthquakes associated with Convergent plate margins...
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- Fall '08
- Plate Tectonics, convergent plate margins, rigid tectonic plates, earthquakes Convergent Margins, boundariesof tectonic plates