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Geology of the Santa Monica Mountains

February 9 @ 7:00 pm - 9:00 pm

Presented by Bill Neill, Co-President, CNPS LA/SMM Chapter

Unlike northern California, the Santa Monica Mountains contain no serpentine so the influence of geology on plant distributions is subtle. Nonetheless, a general knowledge of rock types and their history is useful when viewing the natural flora. The geological history of the Santa Monica Mountains is complex because the region was once aligned with the coast of Orange County, then rotated about 120 degrees clockwise to its present position when sideways movement started on the proto-San Andreas Fault, thus forming the deep Los Angeles sedimentary basin. This presentation will provide an introduction to the various sedimentary and volcanic rock units, which can influence native plant communities, and will make the tilted structures and juxtaposed rock types more understandable to the casual observer.

Biography: Bill Neill studied geology at UCLA and Stanford University, then was employed for about 20 years as a petroleum engineer. He has worked about 20 years as a professional herbicide applicator controlling invasive wildland weeds in natural areas, including the Santa Monica Mountains.

Information for logging onto the Zoom presentation will be posted on our website and Facebook twenty hours before the event and announced via email blast.  If you are not on our Chapter email list, subscribe by clicking here. 


February 9
7:00 pm - 9:00 pm
Event Category: