Geophysical evidence for wedging in the San Gorgonio Pass structural knot, southern San Andreas fault zone, southern California

A comparison between the transpressional plate boundaries of South Island, New Zealand, and southern California, USA: The Alpine and San Andreas Fault Systems

“…To the northwest, however, it reverses dip to moderately southwestward [Griscom and Jachens, 1990]. To the southeast, it dips moderately northeastward [Jones et al, 1986;Griscom and Jachens, 1990;Fuis et al, 2007], although local dip reversals with depth ("wedge tectonics") have been modeled in one place from potential-field data [Langenheim et al, 2005].…”

Stress-drop heterogeneity within tectonically complex regions: a case study of San Gorgonio Pass, southern California

“…Yule & Sieh 2003). Consequently, the slip on the San Andreas fault system may partially bypass the SGP region, for example, via the San Jacinto fault to the west (Allen 1957;Yule & Sieh 2003;Langenheim et al 2005;McGill et al 2013).…”

A New Perspective on the Geometry of the San Andreas Fault in Southern California and Its Relationship to Lithospheric Structure

“…2a), gravity and magnetic data also suggest a southwestward dip (30°-75°), but uncertainty is greater. In the San Gorgonio Pass area, approximately 250 km southeast of the Big Bend cross section, gravity modeling indicates that the Banning strand of the SAF dips very gently (10°-15°) to the northeast in the upper few kilometers (Griscom and Jachens, 1990;Langenheim et al, 2005) (Fig. 2a).…”

“…Model SAF surface from this study is superposed (gray line). Note in (c) we have blended results from modeling SAF in upper few km (Langenheim et al, 2005) with a deep SAF surface that is extrapolated between profiles presented in this study at North Palm Springs and San Bernardino. Cuca, Cucamonga thrust fault.…”