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

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
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 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

This note was uploaded on 10/06/2010 for the course GEOL 240Lxg at USC.

Page1 / 3

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

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online