Photomosaics and logs of trenches on the San Andreas Fault at Arano Flat near Watsonville, California

[摘要] We present photomosaics and logs of the walls of trenches excavated for a paleoseismic study at Arano Flat, one of two sites along the San Andreas fault in the Santa Cruz Mountains on the Kelley-Thompson Ranch. At this location, the fault consists of a narrow zone along the northeast side of a low ridge adjacent to a possible sag pond and extends about 60-70 meters across a broad alluvial flat. This site was a part of Rancho Salsipuedes beginning in 1834 and was purchased by the present owner��s family in 1851.

[发布机构] U.S. Geological Survey

[学科分类] 地球科学(综合)