Photomosaics and logs of trenches on the San Andreas Fault at Arano Flat near Watsonville, California
Open-File Report
2003-450
By: Thomas E. Fumal, Gordon F. Heingartner, Laura Samrad, Timothy E. Dawson, John C. Hamilton, and John N. Baldwin
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Abstract
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.
Suggested Citation
Fumal, T.E., Heingartner, G.F., Samrad, L., Dawson, T.E., Hamilton, J.C., and Baldwin, J.N., 2004, Photomosaics and logs of trenches on the San Andreas Fault at Arano Flat near Watsonville, California: U.S. Geological Survey Open-File Report 2003-450, 3 Plates: 83.52 x 34.55 inches and smaller, https://doi.org/10.3133/ofr03450.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Photomosaics and logs of trenches on the San Andreas Fault at Arano Flat near Watsonville, California |
| Series title | Open-File Report |
| Series number | 2003-450 |
| DOI | 10.3133/ofr03450 |
| Year Published | 2004 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Earthquake Science Center |
| Description | 3 Plates: 83.52 x 34.55 inches and smaller |
| Country | United States |
| State | California |
| City | Watsonvilles |
| Other Geospatial | Arano Flat;San Andreas Fault |