S.R. Hartwell S.Y. Johnson M.W. Manson 2014 vector digital data Data Series DS 781 Reston, VA U.S. Geological Survey https://doi.org/10.3133/ds781 https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html Nadine E. Golden 2013 database Data Series DS 781 Reston, VA U.S. Geological Survey https://doi.org/10.3133/ds781 This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Salt Point map area, California. The vector data file is included in "Geology_OffshoreSaltPoint.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Golden, N.E., Hartwell, S.R., Erdey, M.D., Greene, H.G., Cochrane, G.R., Kvitek, R.G., Manson, M.W., Endris, C.A., Dieter, B.E., Watt, J.T., Krigsman, L.M., Sliter, R.W., Lowe, E.N., and Chin, J.L. (S.Y. Johnson and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Salt Point, California: U.S. Geological Survey Open-File Report 2015–1098, pamphlet 37 p., 10 sheets, scale 1:24,000, https://doi.org/10.3133/ofr20151098. Marine geology and geomorphology was mapped in the Offshore of Salt Point map area, California, from approximate Mean High Water (MHW) to the 3-nautical-mile limit of California's State Waters. Offshore geologic units were delineated on the basis of integrated analyses of adjacent onshore geology with multibeam bathymetry and backscatter imagery, seafloor-sediment and rock samples, digital camera and video imagery, and high-resolution seismic-reflection profiles. To expand geologic mapping to the seafloor within the California's State Waters, to update coastal geologic mapping, and to contribute to a uniform regional geologic database, which can be used in geographic information systems. Additionally, to provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the Salt Point coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes. Additional information about the USGS field activity from which some of these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=S809NC Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology. 2006 2010 ground condition Complete none planned -123.481291 -123.277844 38.639335 38.479861 USGS Metadata Identifier USGS:01be0b85-a006-41d8-af3a-9d3d477becf6 ISO 19115 Topic Category geoscientificInformation environment oceans imageryBaseMapsEarthCover Marine Realms Information Bank (MRIB) keywords seabed marine geology geologic mapping USGS Thesaurus geologic maps marine geology sea-floor characteristics maps and atlases geospatial datasets None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Coastal and Marine Ecological Classification Standard (CMECS) Marine Nearshore Subtidal Marine Offshore Subtidal Transform Continental Margin Continental/Island Shelf Rock Substrate Unconsolidated Mineral Substrate Geographic Names Information System (GNIS) Pacific Ocean State of California Northern California Salt Point Sonoma County Coastal and Marine Ecological Classification Standard (CMECS) Northern California Ecoregion Coastal and Marine Ecological Classification Standard (CMECS) Substrate None USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-427-4747 pcmsc_data@usgs.gov https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/images/Geology_OffshoreSaltPoint.jpg Geology in the Offshore of Salt Point map area. JPEG Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.0.2414 Samuel Y. Johnson Peter Dartnell Nadine E. Golden Stephen R. Hartwell Mercedes D. Erdey H. Gary Greene Guy R. Cochrane Rikk G. Kvitek Michael W. Manson Charles A. Endris Bryan E. Dieter Janet T. Watt Lisa M. Krigsman Ray W. Sliter Eric N. Lowe John L. Chin 2015 pamphlet and map sheets Open-File Report 2015-1098 Reston, VA U.S. Geological Survey https://doi.org/10.3133/ofr20151098 Map elements were visually checked for overshoots, undershoots, duplicate features, and other errors by the lead authors and by the GIS technician(s) who created the digital database. Review drafts of the map were reviewed internally by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards. Data are complete: no offshore features that could be accurately identified and represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 100 square meters. All geospatial database elements are attributed. Polygons were primarily mapped by one of the following methods: (1) interpretation of 2-meter-resolution hillshaded bathymetry data from bathymetric lidar and sonar surveys (see Bathymetry--Offshore of Salt Point Map Area, California); (2) interpretation of 2-meter-resolution amplitude (backscatter) data from bathymetric sonar surveys (see Backscatter--Offshore of Salt Point Map Area, California); (3) interpretation of 2-meter interpretation of seismic-reflection-profile data (see field activity S-8-09-NC). Map Unit contact locations were interpreted typically at a scale of between 1:1,000 and 1:2,000 using the above base data. Bathymetric sonar and LiDAR data have a horizontal accuracy greater than the resolution of the base data. Map unit contacts were digitized by heads-up screen digitization of line data on 2-meter-resolution DEMs described above. Horizontal accuracy is estimated to be between 2 and 5 meters depending on how clearly contacts can be resolved. Most digitized positions on the map are estimated to have better than 5 m horizontal accuracy. There is no elevation data in the database. Carrie K. Bretz Rikk G. Kvitek Peter Dartnell Eleyne L. Phillips 2014 raster digital data Data Series DS 781 Reston, VA U.S. Geological Survey See metadata for bathymetry ("Bathymetry_OffshoreSaltPoint_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information. https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html digital file of gridded bathymetry data (ArcInfo GRID) 2006 2009 ground condition bathymetry Gridded bathymetry data (2-meter resolution). Carrie K. Bretz Rikk G. Kvitek Peter Dartnell Eleyne L. Phillips 2014 raster digital data Data Series DS 781 Reston, VA U.S. Geological Survey See metadata for backscatter ("BackscatterA_8101_OffshoreSaltPoint_metadata.txt", "BackscatterB_Swath_OffshoreSaltPoint_metadata.txt" and "BackscatterC_7125_OffshoreSaltPoint_metadata.txt") in DS 781 for amplitude source data and postprocessing/reprocessing information. https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html digital file of gridded amplitude data (ArcInfo GRID) 2006 2007 ground condition backscatter Gridded amplitude data (2-meter resolution). U.S. Geological Survey (USGS), Coastal and Marine Geology Program (CMGP) 2013 Menlo Park, CA U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG) https://cmgds.marine.usgs.gov/fan_info.php?fan=S809NC ASCII lat/long shot point files 20090908 20090930 ground condition S-8-09-NC Digital seismic data used to interpret subsurface geologic structure Jane A. Reid Jamey M. Reid Chris J. Jenkins Mark Zimmerman S. Jeffress Williams Michael E. Field 2006 Data Series DS 182 Menlo Park, CA U.S. Geological Survey https://pubs.usgs.gov/ds/2006/182/ Esri project files, csv files 2006 publication date sediment seafloor sediment and rock samples used to interpret seafloor geology Nadine E. Golden Guy R. Cochran 2013 data release DOI:10.5066/F7J1015K Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/F7J1015K seafloor video and photographs 2013 publication date imagery seafloor video and photographs used to interpret seafloor geology Map unit polygons were digitized over underlying 2-meter base layers developed from multibeam bathymetry and backscatter data. Derivatives such as slope and curvature were generated from source rasters. Interpreted rasters include amplitude, hillshaded bathymetry (using various illumination angles and vertical exaggeration), slope, and curvature. Curvature was decomposed into profile and plan curvature for analysis purposes. bathymetry backscatter S-8-09-NC sediment imagery 2012 The mapped area was extended to the shoreline by using digital orthophotos to interpret the region between the inner edge of the multibeam bathymetry and the approximate shoreline. The approximate shoreline was generated at the NAVD88 +1.46 m contour, defined as the operational MHW shoreline by Weber and others (2005). The resulting boundary was transformed to WGS 84 UTM Zone 10 North in ArcGIS 10 using the NAD83 to WGS84 (ITRF00) transformation algorithm. This boundary was then used to extend and trim both onshore and offshore geology in the print and PDF product. The transformed boundary is contained within the WGS84 "contours" feature class and identified as a water boundary in the associated representation rules. Only data for offshore map units are released digitally in this publication. For onshore geology, see California Geological Survey (1974), Fuller and others (2002), Huffman (1972), Manson and others (2006), and Witter and others (2006). References Cited: California Geological Survey, 1974, Alquist-Priolo Earthquake Fault Zone Maps of Annapolis and Plantation quadrangles, scale 1:24,000. Fuller, M.S., Haydon, W.D., Purcell, M.G., and Custis, K., 2002, Geologic and geomorphic features related to landsliding, Gualala River watershed, Sonoma and Mendocino counties, California: California Geological Survey Watershed Mapping Series, Map Set 5, Plate 1, Sheet 3 of 3, scale 1:24,000. Huffman, M.E., 1972, Geology for planning on the Sonoma County coast between the Russian and Gualala Rivers: California Division of Mines and Geology Preliminary Report 16, 38 p., 4 plates, scale 1:24,000. Manson, M.W., Huyette, C.M., Wills, C.J., Huffman, M.E., Smelser, G.G., Fuller, M.E., Domrose, C., and Gutierrez, C., 2006, Landslides in the Highway 1 corridor between Bodega Bay and Fort Ross, Sonoma County, California: California Geological Survey Special Report 196, 26 p., 2 plates, 38 maps, scale 1:12,000. Witter, R.C., Knudsen, K.L., Sowers, J.M., Wentworth, C.M., Koehler, R.D., Randolph, C.E., Brooks, S.K., and Gans, K.D., 2006, Maps of Quaternary Deposits and Liquefaction Susceptibility in the Central San Francisco Bay Region, California, U.S. Geological Survey Open-File Report 06-1037, scale 1:24,000. 2011 Added Distribution_Information section to metadata to facilitate data download. 20171005 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20171005 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata. 20180426 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Metadata was modified to bring up to current USGS PCMSC standards. USGS Thesaurus and keywords were added, information for accompanying Open-File Report added to Abstract and Cross Reference sections, Point of Contact and Metadata Contact information was updated, and Process Steps were refined. Information about the data available for download and different Network Resource Name links and details were given in the Standard Order Process section. Minor typos were corrected. No data information was changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent. 20230317 Susan A Cochran U.S. Geological Survey, Pacific Coastal and Marine Science Center Geologist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060-5792 USA (831) 460-7545 scochran@usgs.gov Vector GT-polygon composed of chains 873 WGS 1984 UTM Zone 10N 0.9996 -123.0 0.0 500000.0 0.0 coordinate pair 0.0001 0.0001 Meter D WGS 1984 WGS 1984 6378137.0 298.257223563 MapUnitPolys Polygons representing geologic / geomorphic map units This report FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. MapUnitAbb Map Unit abbreviation This report af Artificial fill and anthropogenic material This report Qms Marine nearshore and shelf deposits This report Qmsd Marine shelf scour depressions This report Qmsc Coarse-grained marine nearshore and shelf deposits This report Qmsf Fine-grained marine shelf deposits This report Tgr German Rancho Formation This report Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. U.S. Geological Survey mailing and physical address

345 Middlefield Rd

Menlo Park CA 94025-3561 USA (650) 329-4309 The .zip file (https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data/Geology_OffshoreSaltPoint.zip) includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the geology data layer of Offshore of Salt Point, California, map area. 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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. shapefile ArcMap (version 10.0, ESRI, 2011) Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates. The .zip file includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the geology data layer of the Offshore of Salt Point, California, map area. WinZip 1.2 https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data/Geology_OffshoreSaltPoint.zip https://pubs.usgs.gov/ds/781/OffshoreSaltPoint/data_catalog_OffshoreSaltPoint.html https://doi.org/10.3133/ds781 The first link will begin a direct download of the data. The second link is a landing page on which all of the downloadable data for a particular region are listed. The third link is a landing page for the entire data catalog. none 20230317 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time