Benjamin L Melosh Jackson Bodtker Zenon C Valin 20231004 vector digital data https://doi.org/10.5066/P9F6XKUO This geologic map database is comprised of new geologic mapping, at a 1:24,000 scale, along the southern Bartlett Springs fault in the northern California Coast Ranges. The map covers an area of 258 square miles in Lake, Napa, Colusa, and Yolo counties, work was undertaken between 2016 and 2021, and supported by the USGS National Cooperative Geologic Map Program. This geodatabase contains the most up-to-date and highest resolution mapping in the region. Results and observations reported here help elucidate the geologic deformational history, as well as relationships between active older and active structures. Please consult the map pamphlet and description of map units for a detailed presentation and interpretation of data and discussion of results. The report and geodatabase contain two plates including the geologic map as well as a correlation of map units, four geologic cross sections, six microseismic cross sections, and a microseismicity fault map. Mapping was driven by the need to understand the distribution of rock types along the southern Bartlett Springs fault as well as the most-recent active uplift and strike-slip faulting in the region. This portion of the Bartlett Springs fault zone as well as the northern Berryessa fault is geometrically complex, involving several step-overs, and many micro seismicity clusters. These fault zones represent significant seismic hazards to local communities as well as near-by locations in the greater San Francisco Bay Area. The map serves as a base to develop future three-dimensional structural models of the area, in conjunction with geophysical surveys. Information in this database may be used for fault hazard assessments as well as natural resource development. 20160101 20220101 ground condition Complete As needed Between Cache Creek and Lake Berressa, eastern edge of the Northern California Coast Ranges -122.5457 -122.2368 39.0012 38.6099 ISO 19115 Topic Category biota None geologic map active faults earthquakes geologic cross sections natural resources serpentinite water resources USGS Metadata Identifier USGS:64dfd3b7d34e5f6cd553c2de None Cache Creek Lake Berryessa Clear Lake Knoxville San Francisco Bay Region California None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Ben Melosh USGS Research Geologist mailing and physical

P.O. Box 158 350 N Akron Rd

Moffett Field CA 94035 United States 1-650-439-2361 bmelosh@usgs.gov Benjamin L Melosh Jackson Bodtker Zenon C Valin 00000000 publication Points collected in the field by handheld GPS and are accurate to 3 meters. Location accuracy of geologic lines or contacts and faults are described in the associated data table and were determined during field based mapping. The digital database is level 3 GeMS compliant, data duplication/omission was checked, values fall within expected ranges, and topology tests were conducted. The dataset represent certain types of phenomenon within a fixed geographic extent. Geologic data was collected in the field with hand held GPS, topographic map, compass, hammer, notebook, and hand lense. This data was entered into a GIS program to construct the map and dataset presented here. 20231002 Vector Point 0.000001 0.000001 Decimal degrees North American Datum of 1983 (NAD 83) Geodetic Reference System 1980 6378137.000000 298.257222 GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/xxxxxxxx None 20231004 Ben Melosh USGS Research Geologist mailing

350 N Akron Rd

Moffett Field CA 94035 United States 650-439-2361 bmelosh@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999