Photomosaics and logs of trenches on the San Andreas Fault at Mill Canyon near Watsonville, California
Open-File Report
2003-469
By: Thomas E. Fumal, Timothy E. Dawson, Rebecca Flowers, John C. Hamilton, Gordon F. Heingartner, James Kessler, and Laura Samrad
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Abstract
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.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Photomosaics and logs of trenches on the San Andreas Fault at Mill Canyon near Watsonville, California |
| Series title | Open-File Report |
| Series number | 2003-469 |
| DOI | 10.3133/ofr03469 |
| Year Published | 2004 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 1 Plate: 67.65 x 35.18 inches |
| Country | United States |
| State | California |
| City | Watsonville |
| Other Geospatial | Mill Canyon, San Andreas Fault |