Image: Tar volcano in the Carpinteria Asphalt mine

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Description: A tar volcano in the Carpinteria Asphalt mine, showing how oil exudes from joint cracks in the upturned Monterey shale forming the floor of mine. Santa Barbara County, California. October 16, 1906. Plate 3-A in U.S. Geological Survey. Bulletin 321. 1907. Image file: /htmllib/btch347/btch347j/btch347z/arn00533.jpg
Title: Tar volcano in the Carpinteria Asphalt mine
Credit: http://libraryphoto.cr.usgs.gov/cgi-bin/show_picture.cgi?ID=ID.%20Arnold,%20R.%20533
Author: Arnold, R. USGS
Permission: This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Monterey Formation

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