wa025.html col 18 western Washington tomography p-wave model


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Figure 35--Dramatic things start to happen on column 18 and following two columns. As the gap in the mafic wedge is approached, the prism sediments and some of the surrounding Crescent Fm. in forced into this narrow gap. At the same time, north-south compression has driven the Crescent Fm. over the top of the prism sediments.

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