Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
Eocene-Mid Miocene sedimentary rocks and Olympic Mountains
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Metasediments from the core of the <strong>Olympic</strong>s at Ruby Beach<br />
Youngest Oldest<br />
Peripheral Rocks:<br />
Mostly the Crescent Fm<br />
Core Rocks<br />
Age:<br />
Mostly <strong>Eocene</strong> (58–45 Myrs)<br />
Rocks<br />
Pillow Basalts<br />
Some Vesicular Basalts<br />
15-30 km thick<br />
Limestone(Red)<br />
w/deep water forams<br />
E-4<br />
E-4<br />
Age:<br />
<strong>Eocene</strong>-<strong>Miocene</strong> (40-20 Myrs)<br />
Metamorphosed 14-12 Myrs<br />
Rocks<br />
S<strong>and</strong>stones<br />
w/graded beds<br />
Shale<br />
Metamorphism<br />
East - Low Grade<br />
(11 km burial)<br />
West - Not Met.<br />
Major Rock Units of the <strong>Olympic</strong>s<br />
1. Peripheral Rocks<br />
2. Core Rocks<br />
Separated by reverse faults<br />
Crescent Formation<br />
Basalt of the Crescent Formation on Klahhane Ridge above Port<br />
Angeles; from http://geology.wr.usgs.gov/parks/olym/olym5.html<br />
E-4<br />
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