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Image: Shale matrix melange

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Description: Shale matrix mélange of the Franciscan Complex at Marshall's Beach, San Francisco, California. Sandstone blocks (light grey) contain white mineral veins. Dark grey shale matrix displays strongly foliated anastomosing scaly fabric. Geologist John Wakabayashi for scale.
Title: Shale matrix melange
Credit: Private collection, American Geophysical Union.
Author: Photo was taken by Nam Thai, photographer under contract for the American Geophysical Union. As an editor of a field trip guide published by the American Geophysical Union, I have received express written permission from the American Geophysical Union to publish this photo to Wikimedia Commons for use in Wikipedia articles.
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Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes

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