Image: Ribbon chert of the Marin Headlands Terrane, exposed at Marshall's Beach, San Francisco
![Ribbon chert of the Marin Headlands Terrane, exposed at Marshall's Beach, San Francisco](/images/thumb/1/19/Ribbon_chert_of_the_Marin_Headlands_Terrane%2C_exposed_at_Marshall%27s_Beach%2C_San_Francisco.jpg/800px-Ribbon_chert_of_the_Marin_Headlands_Terrane%2C_exposed_at_Marshall%27s_Beach%2C_San_Francisco.jpg)
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Original image (5,472 × 3,648 pixels, file size: 7.82 MB, MIME type: image/jpeg)
Description: Outcrop of Jurassic-aged ribbon chert of the Marin Headlands Terrane, exposed at Marshall's Beach, San Francisco, with Marin Headlands visible across the Golden Gate in the background.
Title: Ribbon chert of the Marin Headlands Terrane, exposed at Marshall's Beach, San Francisco
Credit: Own work
Author: Callanbentley
Usage Terms: Creative Commons Attribution 4.0
License: CC BY 4.0
License Link: https://creativecommons.org/licenses/by/4.0
Attribution Required?: Yes
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