Portal de Periódicos da CAPES

Photomosaics and logs of trenches on the San Andreas Fault at Mill Canyon near Watsonville, California

2004; United States Department of the Interior; Linguagem: Inglês

10.3133/ofr03469

2332-4899

Thomas E. Fumal, Timothy E. Dawson, Rebecca M. Flowers, J. C. Hamilton, Gordon F. Heingartner, James Kessler, Laura Samrad,

Geological formations and processes

We present photomosaics and logs of the walls of trenches excavated for a paleoseismic study at Mill Canyon, one of two sites along the San Andreas fault in the Santa Cruz Mtns. on the Kelley-Thompson Ranch. This site was a part of Rancho Salsipuedes beginning in 1834. It was purchased by the present owner’s family in 1851. Remnants of a cabin/mill operations still exist up the canyon dating from 1908 when the area was logged. At this location, faulting has moved a shutter ridge across the mouth of Mill Canyon ponding Holocene sediment. Recent faulting is confined to a narrow zone near the break in slope.