This is indicative of an anomalous feature of the fault. For, although the province, as a whole, extends diagonally across the San Andreas fault, the fault itself "trends more east to west within the Transverse Ranges than normal" (Sharp 17).
At the junction of the Big Pine and San Andreas faults, Frazier Mountain lies to the south, while, to the north, beyond the portion of the Mojave Desert Province that fronts the mountains, the Sierra Nevada turns southwest and west in the Tehachapi mountains. To the west, the southern Coastal Ranges Province meets the Sierra Nevada Province at the point where the Temblor Range, having turned southeast and east into the San Emigdio Mountains and the Pleito Hills, meets the Tehachapi Mountains. To the east of the junction of the Big Pine and San Andreas faults, the northern boundary of the Transverse Ranges Province is somewhat less distinct. It is formed primarily by "a series of discontinuous faults of large displacement along the flanks" of the San Bernardino mountains and by the Pinto Mountain fault along the northern flank of the Pinto Mountains (Oakeshott 281).
To the south the Transverse Ranges Province is bounded in the west by the Santa Monica Mountains, which form the northern border of the Los Angeles Basin. This southern border also extends nearly 100 miles across the continental borderland into three of the Channel Islands, Santa Cruz,