Filters: Tags: Imperial Valley, California (X)
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Imperial Fault trace, one kilometer south of County Highway S-80 (11.3 kilometers northwest of the southeast end of the fault). Echelon fissures (vertically oriented) trend N. 20-50 degrees W. The fault trace trends between N. 30-40 degrees W. Compressional features (dark horizontal bands) join the ends of the separate echelon fractures. The distance between the manmade berms (wide dark diagonal bands) is about 9.1 meters. The maximum width of the obviously deformed zone is about 0.6 meter. View is south. Photo by M.J. Rymer taken on October 23, 1979. Imperial Valley, California Earthquake. October 15, 1979.
Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Dogwood Road (23.1 kilometers northwest of the southeast end of the fault). The main fault trace crosses the top horizontally. Gullies are deeply incised on the upthrown (southwest) side of the fault. The secondary fault branches northward nearly parallel to Dogwood Road and eventually crosses the pavement about 170 meters north of the point where the main fracture crosses it. View is southwest. Photo by D.G. Herd, October 22, 1979. Figure 88, U.S. Geological Survey Professional paper 1254.
Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Robinson Road (20 kilometers northwest of the southeast end of the fault). The vertical component of the 1979 slip created a low scarp (shadowed line) here that has been smoothed at the road surface by grading. The vertical displacement at the surface rupture is about 28 centimeters. The surface rupture on the right extends along the line of bushes that conceal it. Vegetation lineaments of this type commonly mark the fault trace along the margin of Mesquite Basin where some land has not been farmed or otherwise modified. View is northwest. Photo by M.J. Rymer, October 23, 1979. Figure 87, U.S. Geological Survey Professional paper 1254.
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