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Map Satellite In this area, from its junction with Soda Creek to its debouchment in Lake Berryessa, Capell Creek has formed a steep-sided valley that offers excellent exposures of the rocks typical of the inner Coast Ranges. The exposures include serpentine and various rocks of the Franciscan formation, including some shales, graywacke and Franciscan volcanics, all dating from the Mesozoic. Additionally, at the northern end is an outcrop of the Jurassic Knoxville formation.
Several Arctostaphylos spp. are present in the chaparral, which varies from sparse to relatively thick, demonstrating the correlation between soil types and vegetative cover.
Among the native fish found in Capell Creek is what may be a distinct taxon of sculpin, Cottus sp.
Integrity: A road traverses the canyon and there are several buildings. The steepness of the slope has kept the area relatively undisturbed.
Use: Research, educational, observational, Some private.
February 1977
Inventory of California Natural Areas
Revision © 2009 Steven Louis Hartman
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