Northern Coastal

Province Code: 5007

Province 7 includes much of northwestern coastal California, from near Crescent City in Del Norte County to near Paicines in San Benito County. The province is bounded on the north by the Oregon border; on the west by the San Andreas Fault and the 3-mi limit offshore; and on the east by the Coast Range Thrust (as far south as Lake Berryessa), the Hayward Fault (as far south as the southern boundary of Alameda County), and the Tesla and Ortigalita faults. The province is about 410 mi long from northwest to southeast, about 70 mi wide at its widest near Fort Bragg, and occupies an area of about 14,300 sq mi. (Read more in DDS-30)