Geology and geomorphology--Offshore of Bolinas Map Area, California

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: S.Y. Johnson
Originator: H.G. Greene
Originator: M.W. Manson
Originator: S.R. Hartwell
Originator: C.A. Endris
Originator: J.T. Watt
Publication_Date: 2014
Title:
Geology and geomorphology--Offshore of Bolinas Map Area, California
Geospatial_Data_Presentation_Form: vector digital data

Larger_Work_Citation:
Citation_Information:
Originator: Guy R. Cochrane
Originator: Peter Dartnell
Originator: Samuel Y. Johnson
Originator: H. Gary Greene
Originator: Mercedes D. Erdey
Originator: Nadine E. Golden
Originator: Stephen R. Hartwell
Originator: Michael W. Mansion
Originator: Ray W. Sliter
Originator: Charles A. Endris
Originator: Janet T. Watt
Originator: Stephanie L. Ross
Originator: Rikk G. Kvitek
Originator: Eleyne L. Phillips
Originator: Terry R. Bruns
Originator: John L. Chin
Publication_Date: 2015
Title:
California State Waters Map Series--Offshore of Bolinas Map Area, California
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: Open-File Report
Issue_Identification: OFR 2015-1135
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <https://dx.doi.org/10.3133/ofr20151135>
Online_Linkage: <https://pubs.usgs.gov/of/2015/1135/>
Larger_Work_Citation:
Citation_Information:
Originator: Nadine E. Golden
Publication_Date: 2013
Title: California State Waters Map Series Data Catalog
Geospatial_Data_Presentation_Form: database
Series_Information:
Series_Name: Data Series
Issue_Identification: DS 781
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <https://pubs.usgs.gov/ds/781/>
Online_Linkage:
https://www.sciencebase.gov/arcgis/rest/services/Catalog/5556cd65e4b0a92fa7e9cfbd/MapServer
Online_Linkage:
https://www.sciencebase.gov/arcgis/services/Catalog/5556cd65e4b0a92fa7e9cfbd/MapServer/WMSServer?request=GetCapabilities&service=WMS

Description:
Abstract:
This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Bolinas map area, California. The vector data file is included in "Geology_OffshoreBolinas.zip," which is accessible from <https://pubs.usgs.gov/ds/781/OffshoreBolinas/data_catalog_OffshoreBolinas.html>.

The continental shelf within California's State waters in the Bolinas area is relatively flat (less than 0.3 degrees) and shallow (less than 30 m) in the entire area, however the seafloor of the "Marin shelf" east of the San Andreas Fault (see below) is smooth and covered with sediment, whereas the seafloor of the "Bolinas shelf" west of this fault has extensive bedrock outcrop from the nearshore to depths of about 25 m and much less sediment cover. The morphology and geology of this shelf result from the interplay between local tectonics, sea-level rise, sedimentary processes, and oceanography. Tectonic influences are related to local faulting, folding, uplift, and subsidence (see below). Sea level has risen about 125 to 130 m over about the last 21,000 years (for example, Lambeck and Chappel, 2001; Gornitz, 2009), leading to progressive eastward migration (a few tens of km) of the shoreline and wave-cut platform, and associated transgressive erosion and deposition (for example, Catuneanu, 2006). The Offshore of Bolinas map area is now subjected to full, and sometimes severe, Pacific Ocean wave energy and strong currents. Given their relatively shallow depths and exposure to high wave energy, modern shelf sediments are mostly sand (unit Qms). More coarse-grained sands and gravels (units Qmsc and Qmss) are primarily recognized on the basis of bathymetry and high backscatter (see Bathymetry--Offshore Bolinas, California and Backscattter A to E--Offshore Bolinas, California, DS 781, for more information). Unit Qmsc occurs in two areas, on the east flank of Bolinas shelf bedrock exposures, and as three mounds south of Bolinas near the outer boundary of California’s State Waters at water depths of about 25 m. The largest of these mounds is about 450 m long and 70 m wide, and has 80 cm of positive relief above the seafloor.

Unit Qmss is much more extensive and forms erosional lags in rippled scour depressions (for example, Cacchione and others, 1984) that are typically a few tens of centimeters deep and bounded by mobile sand sheets. The depressions occur in four distinct locations. (1) The first location lies adjacent to bedrock outcrops within 2 km of the shoreline south of Double Point (along the western edge of the map area) at water depths of 10 to 25 m. (2) The second unit Qmss location is about 2 to 6 km south of Bolinas Lagoon at similar water depths, along the eastern flank of the Bolinas shelf. (3) The third, more restricted location, occurs about 3 km southeast of Rocky Point at water depths of about 10 to 12 m along the eastern edge of the map area, adjacent to and offshore of small bedrock uplifts. (4) The fourth location, 2 km south of Stinson Beach, is notably different. The polygon on the map encloses a field that includes more than one hundred, much smaller (length less than 20 m) oval depressions and intervening sand flats, perhaps an originally much larger field that has been almost completely filled in by sediment.

Similar unit Qmss rippled-scour depressions are common along this stretch of the California coast where offshore sandy sediment can be relatively thin (thus unable to fill the depressions) due to both lack of river input and to significant erosion and transport of sediment during large northwest winter swells. Although the general areas in which both unit Qmss scour depressions and surrounding mobile sand sheets occur are not likely to change substantially, the boundaries of the unit(s) are likely ephemeral, changing seasonally and during significant storm events.

Areas where shelf sediments form thin (less than 2.5 m) veneers over low-relief Neogene bedrock (see below) occur in the western half of the map and are mapped as units Qms/Tsc (Santa Cruz Mudstone) and Qms/Tp? (Purisima Formation, queried). These hybrid units are recognized and delineated based on the combination of flat relief, continuity with moderate to high relief onshore or offshore bedrock outcrops, high-resolution seismic-reflection data (see field activities S-8-09-NC and L-1-06-SF), and in some cases moderate to high backscatter. The thin sediment layer is regarded as ephemeral and dynamic, and may or may not be present at a specific location based on storms, seasonal/annual patterns of sediment movement, or longer-term climate cycles. In a nearby, similarly high-energy setting, Storlazzi and others (2011) have described seasonal burial and exhumation of submerged bedrock in northern Monterey Bay.

The southeastern corner of the map area includes a portion of the outer flank of the horseshoe-shaped "San Francisco Bar" (unit Qmsb), which has formed at the mouth of the San Francisco ebb-tidal delta (Barnard and others, 2007; Dallas and Barnard, 2011). This delta-mouth bar is shaped by both tidal currents and waves, resulting in a variably hummocky, mottled, and rilled seafloor, and this surface texture is used as a primary criteria for mapping the unit and defining its contacts.

Map unit polygons were digitized over underlying 2-meter base layers developed from multibeam bathymetry and backscatter data (see Bathymetry--Offshore Bolinas, California and Backscattter A to E--Offshore Bolinas, California, DS 781, for more information). The bathymetry and backscatter data were collected between 2006 and 2010.

References Cited

Barnard, P.L., Eshelman, J., Erikson, L., and Hanes, D.M., 2007, Coastal processes study at Ocean Beach, San Francisco, CA: Summary of data collection 2004-2006: U.S. Geological Survey Open-File Report 2007-1217, 165 p.

Cacchione, D.A., Drake, D.E., Grant, W.D., and Tate, G.B., 1984. Rippled scour depressions of the inner continental shelf off central California: Journal of Sedimentary Petrology, v 54, p. 1280-1291.

Catuneanu, O., 2006, Principles of Sequence Stratigraphy: Amsterdam, Elsevier, 375 p.

Dallas, K.L., and Barnard, P.L., 2011, Anthropogenic influences on shoreline and nearshore evolution in the San Francisco coastal system: Estuarine Coastal and Shelf Science, v. 92, p. 195-204.

Gornitz, V., 2009, Sea level change, post-glacial, in Gornitz, V., ed., Encyclopedia of Paleoclimatology and Ancient Environments: Encyclopedia of Earth Sciences Series. Springer, pp. 887-893.

Lambeck, K., and Chappell, J., 2001, Sea level change through the last glacial cycle: Science, v. 292, p. 679-686.

Storlazzi, C.D., Fregoso, T.A., Golden, N.E., and Finlayson, D.P., 2011, Sediment dynamics and the burial and exhumation of bedrock reefs along on emergent coastline as elucidated by repretitive sonar surveys, northern Monterey Bay, CA: Marine Geology, v. 289, p. 46-59.
Purpose:
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 Bolinas 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.
Supplemental_Information:

Map political location: Marin County, California Compilation scale: 1:24,000 Base maps used are hillshades generated from IfSAR, LiDAR, and multibeam mapping both onshore and offshore (see Bathymetry Hillshade--Offshore Bolinas, California, California, DS 781, for more information).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2006
Ending_Date: 2009
Currentness_Reference: ground condition

Status:
Progress: Complete
Maintenance_and_Update_Frequency: none planned

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.78
East_Bounding_Coordinate: -122.58
North_Bounding_Coordinate: 37.96
South_Bounding_Coordinate: 37.81

Keywords:
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Bathymetry
Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: environment
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of California
Place_Keyword: Bolinas
Place_Keyword: Marin County
Place_Keyword: Stinson Beach
Place_Keyword: Bolinas Lagoon

Access_Constraints:
If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Use_Constraints:
This information is not intended for navigational purposes.
Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Pacific Coastal and Marine Science Center
Contact_Person: Stephen Hartwell
Contact_Position: Geologist
Contact_Address:
Address_Type: physical address
Address: 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA
Contact_Voice_Telephone: (831) 460-7814
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: shartwell@usgs.gov

Native_Data_Set_Environment:
Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.0.2414

Browse_Graphic:
Browse_Graphic_File_Name:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/images/Geology_OffshoreBolinas.jpg>
Browse_Graphic_File_Description: Geology and geomorphology offshore Bolinas.
Browse_Graphic_File_Type: JPEG


Data_Quality_Information:
Logical_Consistency_Report:
Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, 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.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Polygons were primarily mapped by one of the following methods: (1) interpretation of 2-meter-resolution hillshaded bathymetry data from sonar surveys (see Bathymetry Hillshade--Offshore Bolinas, California, California, DS 781, for more information); (2) interpretation of 2-meter-resolution amplitude (backscatter) data from bathymetric sonar surveys (see BackscatterA_8101_2004; BackscatterB_8101_2007; BackscatterC_7125; and BackscatterD_Snippets; and Backscatter E_Swath--Offshore Bolinas, California, DS 781, for more information); (3) interpretation of 2-meter interpretation of seismic-reflection-profile data (see field activities S-8-09-NC and L-1-06-SF).
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 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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Rikk G. Kvitek
Originator: Carrie K. Bretz
Publication_Date: 2013
Title: Bathymetry--Offshore of Bolinas Map Area, California
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Data Series
Issue_Identification: DS 781
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
See metadata for bathymetry ("Bathymetry_OffshoreBolinas_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information.
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/Bathymetry_OffshoreBolinas_metadata.txt>
Type_of_Source_Media: digital file of gridded bathymetry data (ArcInfo GRID)
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2006
Ending_Date: 2009
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DS 781
Source_Contribution: Gridded bathymetry data (2-meter resolution).
Source_Information:
Source_Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Mercedes Erdey
Originator: Rikk G. Kvitek
Originator: Carrie K. Bretz
Publication_Date: 2013
Title: Bathymetry--Offshore of Bolinas Map Area, California
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Data Series
Issue_Identification: DS 781
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
See metadata for backscatter data ("BackscatterA_8101_2004_OffshoreBolinas_metadata.txt", "BackscatterB_8101_2007_OffshoreBolinas_metadata.txt", "BackscatterC_7125_OffshoreBolinas_metadata.txt", "BackscatterD_Snippets_OffshoreBolinas_metadata.txt", and "BackscatterE_Swath_OffshoreBolinas_metadata.txt") in DS 781 for amplitude source data and postprocessing/reprocessing information.
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/BackscatterA_8101_2004_OffshoreBolinas_metadata.txt>
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/BackscatterB_8101_2007_OffshoreBolinas_metadata.txt>
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/BackscatterC_7125_OffshoreBolinas_metadata.txt>
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/BackscatterD_Snippets_OffshoreBolinas_metadata.txt>
Online_Linkage:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/metadata/BackscatterE_Swath_OffshoreBolinas_metadata.txt>

Type_of_Source_Media: digital file of gridded amplitude data (ArcInfo GRID)
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2006
Ending_Date: 2007
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DS 781
Source_Contribution: Gridded amplitude data (2-meter resolution).
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)
Publication_Date: 2013
Title:
Chirp and High-Resolution Mini-Sparker Seismic data of field activity L-1-06-SF in Offshore Golden Gate, San Francisco County, CA from 09/25/2006 to 10/03/2006
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Online_Linkage: <http://walrus.wr.usgs.gov/infobank/gos/l-1-06-sf.fmeta.xml>
Online_Linkage:
<http://walrus.wr.usgs.gov/infobank/l/l106sf/html/l-1-06-sf.meta.html>
Type_of_Source_Media: ASCII lat/long shot point files
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060925
Ending_Date: 20061003
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: L-1-06-SF
Source_Contribution:
Digital seismic data used to interpret subsurface geologic structure


Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)
Publication_Date: 2013
Title:
Subbottom survey data of field activity S-8-09-NC in Stinson Beach to Point Arena (CA) from 09/08/2009 to 09/30/2009
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Online_Linkage: <http://walrus.wr.usgs.gov/infobank/gos/s-8-09-nc.fmeta.xml>
Online_Linkage:
<http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html>
Type_of_Source_Media: ASCII lat/long shot point files
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20090908
Ending_Date: 20090930
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: S-8-09-NC
Source_Contribution:
Digital seismic data used to interpret subsurface geologic structure

Process_Step:
Process_Description:
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.
Process_Date: 2012
Process_Step:
Process_Description:
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), Clark and Brabb (1997), Blake and others (2000), and Witter and others (2006).
References Cited:
Blake, M.C., Jr., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma counties, California: U.S. Geological Survey Miscellaneous Field Studies Map 2337, scale 1:62,500.
California Geological Survey, 1974, Alquist-Priolo Earthquake Fault Zone Map of Bolinas quadrangle, scale 1:24,000.
Clark, J.C., and Brabb, E.E., 1997, Geology of the Point Reyes National Seashore and vicinity: U.S. Geological Survey Open-File Report 97-456, scale 1:48,000.
Weber, K.M., List, J.H., and Morgan, K.L., 2005, An operational Mean High Water datum for determination of shoreline position from topographic lidar data: U.S. Geological Survey Open-File Report 2005-1027, available at <https://pubs.usgs.gov/of/2005/1027/>.
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.
Process_Date: 2011
Process_Step:
Process_Description:
Faults were mapped onto shot lines based on the latitude and longitude of seismic picks from field activity S-8-09-NC.
Process_Date: 2011
Process_Step:
Process_Description:
Faults were mapped onto shot lines based on the latitude and longitude of seismic picks from field activity L-1-06-SF.
Process_Date: 2011
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 874
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: WGS 1984 UTM Zone 10N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Geology_OffshoreBolinas
Entity_Type_Definition: Polygons representing geologic / geomorphic map units
Entity_Type_Definition_Source: This report
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: MapUnitAbbrev
Attribute_Definition: Map Unit abbreviation
Attribute_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qms
Enumerated_Domain_Value_Definition: Marine nearshore and shelf deposits
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qmss
Enumerated_Domain_Value_Definition: Marine shelf scour depressions
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qmsc
Enumerated_Domain_Value_Definition: Coarse-grained marine nearshore and shelf deposits
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qmsb
Enumerated_Domain_Value_Definition: Marine ebb-tidal bar deposits
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qms/Tp
Enumerated_Domain_Value_Definition: Thin marine sediment sheet overlies Purisima Formation
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qms/Tsc
Enumerated_Domain_Value_Definition: Thin marine sediment sheet overlies Santa Cruz Mudstone
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Tp
Enumerated_Domain_Value_Definition: Purisima Formation
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Tsc
Enumerated_Domain_Value_Definition: Santa Cruz Mudstone
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Tu
Enumerated_Domain_Value_Definition: Tertiary sediments, undivided
Enumerated_Domain_Value_Definition_Source: This report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: KJf
Enumerated_Domain_Value_Definition: Franciscan Complex, undivided
Enumerated_Domain_Value_Definition_Source: This report
Attribute:
Attribute_Label: MapUnitAbb
Attribute_Definition: short description of map unit
Attribute_Definition_Source: This report
Attribute_Domain_Values:
Unrepresentable_Domain: text description of map unit
Attribute:
Attribute_Label: Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 345 Middlefield Rd
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025-3561
Country: USA
Contact_Voice_Telephone: (650) 329-4309

Distribution_Liability:

These databases, identified as bathymetry and shaded-relief maps of Offshore Bolinas map area, California have been approved for release and publication by the U.S. Geological Survey (USGS). Although these databases have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although these data have been processed successfully on a computer system at 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. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
These data are not intended for navigational use.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
Format_Version_Number: ArcMap (version 10.0, ESRI , 2011)
Format_Specification:
Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates, with datum WGS84.
Format_Information_Content:
The .zip file for a shapefile includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as the text (.txt) and XML (.shp.xml) versions of the metadata for the Geology data layer of Offshore Bolinas, California.
File_Decompression_Technique: WinZip
Transfer_Size: 1.1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<https://pubs.usgs.gov/ds/781/OffshoreBolinas/data/Geology_OffshoreBolinas.zip>
Network_Resource_Name: <https://pubs.usgs.gov/ds/781/>
Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
Fees: none
Technical_Prerequisites:
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 SHP. Users should download the ArcGIS Project File, OffshoreBolinasGIS.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 "Offshore Bolinas" and has all the data symbolized as on the OFR map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.

Metadata_Reference_Information:
Metadata_Date: 20140211
Metadata_Review_Date: 20140908
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program
Contact_Person: Stephen R. Hartwell
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: US
Contact_Voice_Telephone: 831-460-7814
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: shartwell@usgs.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.16 on Tue Jul 28 16:54:57 2015