Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012

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; Robert R. Sickler

doi:10.3133/ofr20141033

USGS · ofr20141033

Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012

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·Robert R. Sickler

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Abstract

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.

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Source-reported bounding extent: 37.1986° to 39.1343° latitude; -123.6786° to -121.5431° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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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, Robert R. Sickler. 2014. Logs and data from trenches across the Berryessa Fault at the Jerd Creek site, northeastern Napa County, California, 2011-2012. https://doi.org/10.3133/ofr20141033

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