Stanford University

Geological Sciences Seminar: Marty Grove, Stanford University

Tuesday, Oct 26, 2021 12:15 PM
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Faculty/Staff, Students, Alumni/Friends
Department of Geological Science

Geologic evolution of the Point San Pedro area: Insights from detrital thermochronology

The Point San Pedro – Devil’s Slide area of the San Mateo coast preserves a rich 100 m.y. history of plate tectonic interactions that affected the California margin.  The coastal area is well-preserved, accessible, and a featured hike in GeolSci 5 – Living on the Edge. The ca. 105 Ma Montara Granite and overlying Paleocene strata are part of a crustal sliver (Salinia) that was displaced ca. 360 km northwestwards away from the southernmost, mid-Cretaceous Sierra Nevada batholith along the San Andreas transform during the Neogene.  Geologic relationships and new detrital K-feldspar thermochronology indicate that the Salinian rocks were strongly folded during Miocene tectonic burial to 2-3 km depth. This deformation resulted from overthrusting by rocks of the Cretaceous Franciscan subduction complex across the Pilarcitos fault, a presently inactive segment of the modern San Andreas fault system. 

Dr. Marty Grove is a research professor in the Department of Geological Sciences who applies field, petrologic, and geo/thermochronologic methods to solve tectonic problems.

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