Fault Gouge Clay (major mineral Montmorillonite) formed from ground rock rubbing between the Pacific and North American Plates.

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Fault Gouge Clay (major mineral Montmorillonite) formed from ground rock rubbing between the Pacific and North American Plates. San Andreas Fault Zone, Mecca Hills, Riverside County, California

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Photo credit: © Susan E. Degginger / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -swelling, american, andreas, bentonite, calciur, california, clay, county, fault, geology, gouge, hills, mecca, mineralogy, montmorillonite, north, pacific, plates, riverside, rock, rocks, sample, samples, san, specimen, specimens, tectonic