Download ALL Selected Citations to Citation Manager

Selected Abstracts

Returned: 1 citations and abstracts. Click on down arrow or scroll to see abstracts.

Laura Dair, and Michele L. Cooke

San Andreas fault geometry through the San Gorgonio Pass, California
Geology 37: 119-122.

---

Abstract 1 of 1

San Andreas fault geometry through the San Gorgonio Pass, California

Laura Dair¹ and Michele L. Cooke¹

¹ Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003, USA

Three-dimensional numerical models are needed to investigatethe role of nonvertical strike-slip fault segments on the deformationwithin restraining bends. Numerical models simulate geologicdeformation of two alternative three-dimensional present-dayconfigurations for the San Andreas fault through the restrainingbend within the San Gorgonio Pass region (SGPR) in SouthernCalifornia. Both models produce decreasing strike-slip ratessouthward along the San Bernardino strand of the San Andreasfault, similar to geologic data. The north-dipping San Andreasfault model better matches the available strike-slip data aswell as the geologic uplift data for the southern San BernardinoMountains than the vertical San Andreas fault model. We concludethat a north-dipping fault configuration is preferred for modelsof the San Andreas fault in the SGPR. The complexity of theactive fault geometry at the SGPR promotes the transfer of strikeslip from the San Andreas fault to the nearby but unconnectedSan Jacinto fault. Slip rates and uplift patterns are sensitiveto fault geometry within strike-slip restraining bends.

[Full Text of Dair and Cooke][Reprint (PDF) Version of Dair and Cooke]