|Qms||Marine nearshore and shelf deposits|
|Qmsd||Marine shelf scour depressions|
|Qmsc||Coarse-grained marine nearshore and shelf deposits|
|Qmsf||Fine-grained marine shelf deposits|
|Qmsw||Marine sediment wave deposits|
|Tp?||Purisima Formation, questionable|
|Tsc||Santa Cruz Mudstone|
|Tpr||Point Reyes Conglomerate|
|Tu||Tertiary sediments, undivided|
|Kgg||Porphyritic Granodiorite of Point Reyes|
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 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 Drakes Bay 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.
Are there legal restrictions on access or use of the data?
Use_Constraints: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.
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.
|Data format:||The .zip file includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the geology and geomorphology data layer of Drakes Bay and Vicinity, California. in format shapefile (version ArcMap (version 10.0, ESRI, 2011)) Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates. Size: 0.8|
The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcMap TIFF. Users should download the ArcGIS Project File, DrakesBayGIS.mxd.zip, a compressed (with the "zip" command) version of the ArcMap document (.mxd) that has all the data layers loaded in the table of contents for “Drakes Bay and Vicinity“ and has all the data symbolized as on the map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.