Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Interpretation: Core Rocks<br />
<strong>Olympic</strong><br />
History<br />
Western Core <strong>rocks</strong><br />
accreted first &<br />
were buried deepest<br />
(explains why they<br />
are oldest <strong>and</strong> most<br />
metamorphosed)<br />
Accretionary Wedge<br />
Trench Sediments<br />
But Why is the North “Wedge”<br />
(<strong>Olympic</strong>s) so much larger than the<br />
South “Wedge” (Willapa Hills/Oregon<br />
Coast Range)?<br />
2. There is a bend in the<br />
Juan de Fuca Plate<br />
under the <strong>Olympic</strong>s<br />
<strong>Olympic</strong>s<br />
Cross Section<br />
North ------ South<br />
N. America<br />
Juan de Fuca<br />
E-4<br />
E-4<br />
<strong>Olympic</strong> Accretionary Wedge<br />
But Why is the North “Wedge”<br />
(<strong>Olympic</strong>s) so much larger than the<br />
South “Wedge” (Willapa Hills/Oregon<br />
Coast Range)?<br />
1. Shoved in the Corner<br />
Insular ST<br />
<strong>Olympic</strong>s<br />
Coast<br />
Range<br />
Evidence for the Bend<br />
1. NW Volcanoes<br />
Steep Subduction Shallow Subduction<br />
100 Depth<br />
Washington<br />
Oregon<br />
QuickTime <strong>and</strong> a<br />
TIFF (Uncompressed) decompressor<br />
are needed to see this picture.
Change language