File:Flickr - brewbooks - Fidalgo Island Strata.jpg
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Green Point, Washington Park 4 Dec 2004 The geology of the Anacortes area and Fidalgo island is geologically complex and is compressed into a very small area, as you can see from this diagram. I am always interested in Serpentenite areas, and of course, Washington has lots of volcanic areas. Here is an interesting article <493:PAKIOO>2.0.CO;2 abstract "A sequence of Jurassic rocks on Fidalgo Island, Washington, is interpreted to be ophiolite. The order of rock types, from the base upward, is serpentinite, layered gabbro, a dike complex made up mostly of plagiogranite, volcanic rocks that are dominantly keratophyre, coarse breccia with clasts of keratophyre and plagiogranite, pelagic argillite, and siltstone-sandstone turbidites." Plagiogranite and keratophyre in ophiolite on Fidalgo Island, Washington E. H. BROWN, J. Y. BRADSHAW, G. E. MUSTOE Department of Geology, Western Washington University, Bellingham, Washington 98225 Geological Society of America Bulletin Volume 90, Issue 5 (May 1979) Article: pp. 493–507 The following text is transcribed from the diagram that is in Green Park, with some links that I added. Fidalgo Island Strata The Strata - Serpentinite, exposed here along the shoreline, was formed deep inside the earth from peridotite. Above it, in Washington Park, are glacial desposits. Rock formend from ocean sediments, plutonic magma, and volcanic lava is exposde in other areas of Fidalgo Island. A diagrammatic cross-section of Fidalgo Island showing the tilt and exposure of the strata as they may exist. Serpentinite Gabbro and Pyroxenite Plagiogranite, dikes and stocks of igneous rocks Volcanic flows Sedimentary breccia Breccia Pelagic argillite Argillite Tuffaceous argillite Argillite Siltstone and Greywackie Glacial deposits DSCN4789 |
| Date | |
| Source | Fidalgo Island Strata |
| Author | brewbooks from near Seattle, USA |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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This image, originally posted to Flickr, was reviewed on 15 June 2012 by the administrator or reviewer Matanya, who confirmed that it was available on Flickr under the stated license on that date. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 07:17, 15 June 2012 | | 1,936 × 1,365 (267 KB) | Matanya (talk | contribs) | == {{int:filedesc}} == {{Information |Description=Green Point, Washington Park 4 Dec 2004 The geology of the Anacortes area and Fidalgo island is geologically complex and is compressed into a very small area, as you can see from this diagram. I am alwa... |
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Metadata
- Fidalgo Island
- Geology of Washington (state)
- Geological cross sections of Washington (state)
- Information boards in Washington (state)
- Stratigraphy of the United States
- Magmatic dikes in Washington (state)
- Glacial deposits in the United States
- Stratigraphy of Washington (state)
- Tilted strata in Washington (state)