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6 - deep as 670 km deep earthquakes are different than...

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03:16 Intra-Plate Earthquakes-Rare by sometimes large New Madrid, MO –three large eqs. (M7-7.5) Winter of 1811-1812 *1811 and 1812  THREE large earthquakes The size of this event leads geologists to suspect the the New Madrid fault is a  failed rift valley: a place where the North American continent almost split into two  pieces. Convergent Margins: -Usually one plate slides underneath the other = subduction  -Notice Wadati-Benioff Zone SEE DIAGRAM Deepest Eqs in the world are associated with subduction zones, and they go 
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Unformatted text preview: deep as 670 km deep earthquakes are different than surface earthquakes. Different from San Andreas earthquakes Earthquakes associated with Convergent plate margins Why melting occurs during subduction? The cold subducting plate sinking in subduction zones releases water into the overlying mantle, causing mantle melting and fractionating of elements between surface and deep mantle reservoirs, producing island arcs and continental crust 03:16 03:16...
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