The Little Pine fault (LPF) delineates the northeast margin of the Santa Maria Basin. The basin is inverting due to north-northeast, south-southwest shortening, associated with vertical-axis rotation of the western Transverse Ranges to the south. Slip data collected along the Little Pine fault yielded principle compressive stress directions that are indicative of reverse slip, with minor lateral components that vary along strike of the fault. Slip data collected to the northwest along the Foxen Canyon fault is indicative of right lateral strike-slip. Mapped offsets near Coralles, Happy, and Cachuma canyons indicate 228 meters of reverse offset across the LPF south branch since Pliocene time. The LPF is segmented, with segments exhibiting different histories. Based on mapped offsets of contacts between Miocene units near Foxen canyon, the rate of dextral slip along the Foxen Canyon fault is 0.027 to 0.1 millimeters per year from Miocene to Pliocene.
|Advisor:||Onderdonk, Nathan W.|
|Commitee:||Behl, Richard J., Kelty, Thomas K.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 52/05M(E), Masters Abstracts International|
|Keywords:||Santa Ynez Valley, Southern Coast Ranges, Western Transverse Ranges|
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