The [Santa Ynez Mountains] range is a large fault block of Cenozoic age created by the movements of the Santa Ynez Fault.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/places/mountain-ranges/santa-ynez-mountains/santa-ynez-mountains.md
Santa Ynez Mountains (Wikipedia) The Santa Ynez Mountains are a portion of the Transverse Ranges, part of the Pacific Coast Ranges of the west coast of North America. It is the westernmost range in the Transverse Ranges.