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Open-File Report 2014–1033

Prepared in cooperation with the U.S. Bureau of Reclamation

Logs and Data from Trenches Across the Berryessa Fault at the Jerd Creek Site, Northeastern Napa County, California, 2011–2012

By James J. Lienkaemper, Carla M. Rosa, Ian J. Cappelle, Evan M. Wolf, Nichole E. Knepprath, Lucille A. Piety, Sarah A. Derouin, Liam M. Reidy, Joanna L. Redwine, and Robert R. Sickler

Thumbnail of and link to report PDF (277 KB)Introduction

The primary purpose of this report is to provide drafted field logs of exploratory trenches excavated across the Berryessa Fault section of the northern Green Valley Fault (Lienkaemper, 2012; Lienkaemper and others, 2013) in 2011 and 2012 that show evidence for at least one surface-rupturing earthquake in the past few centuries. The site location and site detail are shown on sheet 1. The trench logs are shown on sheets 1, 2, 3 and 4. We also provide radiocarbon ages used for chronological modeling of the earthquake history and a field description of a soil profile in one trench. A formal report based on these logs and data is in preparation.

First posted February 27, 2014

For additional information, contact:
Contact Information, Menlo Park, Calif. Office—Earthquake Science Center
U.S. Geological Survey
345 Middlefield Road, MS 977
Menlo Park, CA 94025

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Suggested citation:

Lienkaemper, J.J., Rosa, C.M., Cappelle, I.J., Wolf, E.M., Knepprath, N.E., Piety, L.A., Derouin, S.A., Reidy, L.M., Redwine, J.L., and Sickler, R.R., 2014, Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011–2012: U.S. Geological Survey Open-File Report 2014–1033, pamphlet 6 p., 4 sheets,

ISSN 2331-1258 (online)




References Cited


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