File:Folded Chert - Glen Canyon.jpg

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English: Photograph of a folded chert outcrop near the lookout in Glen Canyon Park, San Francisco, California. The layers of this particular outcrop, which is near the high point of the park to its north, show remarkable folding that is aligned with the axis of the coastal mountain ranges, and was produced by the forces that lifted them up. In this area, the chert is sometimes called "Franciscan chert" and is rich with fossils of radiolarian creatures.[1]
Date
Source Own work by the original uploader
Author Easchiff at English Wikipedia
  1. ↑ Sloan, Doris (2006) (in English) Geology of the San Francisco Bay Region, University of California Press ISBN: 978-0520241268.

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This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
Attribution: Eric A. Schiff, 2007
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Under the following conditions:
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  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Original upload log[edit]

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
2007-02-15 06:32 2112×2816× (2242403 bytes) Easchiff Photograph of a folded chert outcrop near the lookout in Glen Canyon Park, San Francisco, California. Photograph taken February 4, 2007.

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current19:52, 10 September 2015Thumbnail for version as of 19:52, 10 September 20152,112 × 2,816 (2.14 MB)Innotata (talk | contribs)Transferred from en.wikipedia

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