The Rincon Formation is a sedimentary geologic unit of Lower Miocene age, abundant in the coastal portions of southern Santa Barbara County, California eastward into Ventura County. Consisting of mass
Weathered outcrop of the Rincon Formation, Sycamore Canyon, Santa Barbara, California.
Close-up of the Rincon Shale in a road cut, showing weathered, highly fractured surface.
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with outcrops of the formation in parts of the California Coast Ranges, Peninsular Ranges, and o
Rincon Formation
…of the Santa Ynez Fault, but outcrops nowhere north of the Santa Ynez River. In the subsurface it frequently is found in well cores, underlying the Monterey Formation and overlying the Vaqueros Formation. At the ground surface, the contact with the Vaqueros is obvious along the south slope of the mountains, for it…
Outcrop of Monterey Formation, Gaviota State Park, California
Upper Miocene Migeulito member exposed at Hazard Reef, Montana de Oro State Park. This is the first onshore outcrop of the Monterey Formation south of the Monterey Peninsula. Large exposures continue south along the coast, often associated with important oilfields.
Tar "volcano" in the old Carpinteria Asphalt mine. Heavy oil exudes from joint cracks in the upturned Monterey shale forming the floor of mine. 1906 photo, U.S. Geological Survey Bulletin 321
Fold in Monterey Formation