File:Graywacke turbidites.jpg
Graywacke_turbidites.jpg (480 × 299 pixels, file size: 47 KB, MIME type: image/jpeg)
Summary
Bay of Pillars Formation graywacke (Lower to Upper Silurian): Volcaniclastic graywacke and argillite turbidites in massive and amalgamated beds, with graded beds and rhythmic turbidites. High sand/shale ratios. Locally calcareous sandstone, with limestone lenses. Proximal inner to mid-fan facies turbidites. Graptolites identified on argillaceous bed surfaces. Unit also contains corals and brachiopods (map numbers 49 and 52, Table 1). Unit thickness thickness uncertain, probably several thousand meters. Prince of Wales Island.
Copyright status:
This image is public domain because it was first published by the U.S. Geological Survey
Source:
http://pubs.usgs.gov/of/1999/of99-168/of99-168-pamphlet.html
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:36, 17 April 2009 | | 480 × 299 (47 KB) | Ashcraft (talk | contribs) | Bay of Pillars Formation graywacke (Lower to Upper Silurian): Volcaniclastic graywacke and argillite turbidites in massive and amalgamated beds, with graded beds and rhythmic turbidites. High sand/shale ratios. Locally calcareous sandstone, with limestone |
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