Complex sentence: The Garlock Fault is a left-lateral strike-slip fault running northeast-southwest along the north margins of the Mojave Desert of Southern California, for much of its length along the southern base of the Tehachapi Mountains.
Split into simpler sentences: The Garlock Fault is a left-lateral strike-slip fault running approximately northeast-southwest along the north margins of the Mojave Desert of Southern California. It runs for much of its length along the southern base of the Tehachapi Mountains.