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Geology thread

bjdeming

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Meanwhile, in Arkansas, posted about two hours ago -- proof that cool geology stuff is not just about shakin' and bakin':

 

bjdeming

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Seismic "CT" of the upper crust underneath the US (scale is too large to pick out regional and local features):



A little more info here.

That could be the old Farallon plate (a real troublemaker) whose tail end -- now called the Juan de Fuca plate -- is still subducting under our feet here in the Pacific Northwest, storing up more stresses for the next "big one."
 
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