Faults--Offshore of San Francisco Map Area, California
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: H.G. Greene
- Originator: S.Y. Johnson
- Originator: M.W. Manson
- Originator: S.R. Hartwell
- Originator: C.A. Endris
- Originator: T.R. Bruns
- Publication_Date: 2014
- Title: Faults--Offshore of San Francisco Map Area, California
- Geospatial_Data_Presentation_Form: vector digital data
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: Guy R. Cochrane
- Originator: Samuel Y. Johnson
- Originator: Peter Dartnell
- Originator: H. Gary Greene
- Originator: Mercedes D. Erdey
- Originator: Nadine E. Golden
- Originator: Stephen R. Hartwell
- Originator: Charles A. Endris
- Originator: Michael W. Mansion
- Originator: Ray W. Sliter
- Originator: Rikk G. Kvitek
- Originator: Janet T. Watt
- Originator: Stephanie L. Ross
- Originator: Terry R. Bruns
- Publication_Date: 2015
- Title:
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California State Waters Map Series--Offshore of San Francisco Map Area, California
- Geospatial_Data_Presentation_Form: map
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: OFR 2015-1068
- Publication_Information:
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- Publication_Place: Reston, VA
- Publisher: U.S. Geological Survey
- Online_Linkage: <https://dx.doi.org/10.3133/ofr20151068>.
- Online_Linkage: <https://pubs.usgs.gov/of/2015/1068/>
- Larger_Work_Citation:
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- Citation_Information:
-
- Originator: Nadine E. Golden
- Publication_Date: 2013
- Title: California State Waters Map Series Data Catalog
- Geospatial_Data_Presentation_Form: database
- Series_Information:
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- Series_Name: Data Series
- Issue_Identification: DS 781
- Publication_Information:
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- Publication_Place: Reston, VA
- Publisher: U.S. Geological Survey
- Online_Linkage: <https://pubs.usgs.gov/ds/781/>
- Description:
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- Abstract:
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This part of DS 781 presents data for faults for the geologic and geomorphic map of the Offshore San Francisco map area, California. The vector data file is included in "Faults_OffshoreSanFrancisco.zip," which is accessible from <https://pubs.usgs.gov/ds/781/OffshoreSanFrancisco/data_catalog_OffshoreSanFrancisco.html>.
The Offshore of San Francisco map area straddles the right-lateral transform boundary between the North American and Pacific plates and is cut by several active faults that cumulatively form a distributed shear zone, including the San Andreas Fault, the eastern strand of the San Gregorio Fault, the Golden Gate Fault, and the Potato Patch Fault (Bruns and others, 2002; Ryan and others, 2008). These faults are covered by Holocene sediments (mostly units Qms, Qmsb, Qmst) with no seafloor expression, and are mapped using seismic-reflection data (see field activities S-15-10-NC and F-2-07-NC). The San Andreas Fault is the primary plate-boundary structure and extends northwest across the map area; it intersects the shoreline 10 km north of the map area at Bolinas Lagoon, and 3 km south of the map area at Mussel Rock. This section of the San Andreas Fault has an estimated slip rate of 17 to 24 mm/yr (U.S. Geological Survey, 2010), and the devastating Great 1906 California earthquake (M 7.8) is thought to have nucleated on the San Andreas a few kilometers offshore of San Francisco within the map area (Bolt, 1968; Lomax, 2005).
The San Andreas Fault forms the boundary between two distinct basement terranes, Upper Jurassic to Lower Cretaceous rocks of the Franciscan Complex to the east, and Late Cretaceous granitic and older metamorphic rocks of the Salinian block to the west. Franciscan Complex rocks (unit KJf, undivided) form seafloor outcrops at and north of Point Lobos adjacent to onland exposures. The Franciscan is divided into 13 different units for the onshore portion of this geologic map based on different lithologies and ages, but the unit cannot be similarly divided in the offshore because of a lack of direct observation and (or) sampling.
Faults were primarily mapped by interpretation of seismic reflection profile data (see field activities S-15-10-NC and F-2-07-NC). The seismic reflection profiles were collected between 2007 and 2010.
References Cited
Bolt, B.A., 1968, The focus of the 1906 California earthquake: Bulletin of the Seismological Society of America, v. 58, p. 457-471.
Bruns, T.R., Cooper, A.K., Carlson, P.R., and McCulloch, D.S., 2002, Structure of the submerged San Andreas and San Gregorio fault zones in the Gulf of Farallones as inferred from high-resolution seismic-reflection data, in Parsons, T. (ed.), Crustal structure of the coastal and marine San Francisco Bay region, California: U.S. Geological Survey Professional Paper 1658, p. 77-117.
Lomax, A., 2005, A reanalysis of the hypocentral location and related observations for the Great 1906 California earthquake: Bulletin of the Seismological Society of America, v. 95, p. 861-877.
Ryan, H.F., Parsons, T., and Sliter, R.W., 2008. Vertical tectonic deformation associated with the San Andreas fault zone offshore of San Francisco, California. Tectonophysics, 429 (1-2), p. 209-224.
U.S. Geological Survey and California Geological Survey, 2010, Quaternary fault and fold database for the United States, accessed April 5, 2012, from USGS website: <http://earthquake.usgs.gov/hazards/qfaults/>.
- Purpose:
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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 San Gregorio 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:
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Map political location: San Mateo 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 San Francisco, California, DS 781, for more information).
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 2007
- Ending_Date: 2010
- Currentness_Reference: ground condition
- Status:
-
- Progress: Complete
- Maintenance_and_Update_Frequency: none planned
- Spatial_Domain:
-
- Bounding_Coordinates:
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- West_Bounding_Coordinate: -122.62
- East_Bounding_Coordinate: -122.51
- North_Bounding_Coordinate: 37.86
- South_Bounding_Coordinate: 37.70
- Keywords:
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- 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: San Francisco
- Place_Keyword: San Francisco County
- Place_Keyword: Marin County
- Place_Keyword: San Francisco Bay
- Place_Keyword: Golden Gate
- 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:
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- 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:
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<https://pubs.usgs.gov/ds/781/OffshoreSanFrancisco/images/Folds_OffshoreSanFrancisco.jpg>
- Browse_Graphic_File_Description: Folds offshore San Francisco.
- Browse_Graphic_File_Type: JPEG
- Data_Quality_Information:
-
- Logical_Consistency_Report:
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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.
- Completeness_Report:
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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:
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- Horizontal_Positional_Accuracy_Report:
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Faults were primarily mapped by interpretation of seismic reflection profile data (see field activities S-15-10-NC and F-2-07-NC).
Faults lines were digitized by heads-up screen digitization on to shot-point picks from seismic-line navigation data - each shot point has an associated lat/long in the survey data. Error is introduced
from layback, as well as from interpretation of oblique features, so horizontal accuracy of fault and fold location is estimated to be on the order of 10 to 20 meters.
- Lineage:
-
- Source_Information:
-
- Source_Citation:
-
- Citation_Information:
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- Originator:
-
U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)
- Publication_Date: 2013
- Title:
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Seismic-reflection data acquisition data of field activity
S-15-10-NC in offshore Pescadero from 08/02/2010 to 08/04/2010
- 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-15-10-nc.fmeta.xml>
- Online_Linkage:
-
<http://walrus.wr.usgs.gov/infobank/s/s1510nc/html/s-15-10-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: 20100802
- Ending_Date: 20100804
- Source_Currentness_Reference: ground condition
- Source_Citation_Abbreviation: S-15-10-NC
- Source_Contribution:
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Digital seismic data used to interpret subsurface geologic structure
- Process_Step:
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- Process_Description:
-
Faults were mapped onto shot lines based on the latitude and longitude of seismic picks from field activity S-15-10-NC.
- Process_Date: 2011
- Source_Information:
-
- Source_Citation:
-
- Citation_Information:
-
- Originator:
-
U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)
- Publication_Date: 2013
- Title:
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Geophysical data of field activity F-2-07-NC in Ano Nuevo to
San Francisco from 03/22/2007 to 04/06/2007
- 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/f-2-07-nc.fmeta.xml>
- Online_Linkage:
-
<http://walrus.wr.usgs.gov/infobank/f/f207nc/html/f-2-07-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: 20070322
- Ending_Date: 20070406
- Source_Currentness_Reference: ground condition
- Source_Citation_Abbreviation: F-2-07-NC
- Source_Contribution:
-
Digital seismic data used to interpret subsurface geologic structure
- Process_Step:
-
- Process_Description:
-
Faults were mapped onto shot lines based on the latitude and longitude of seismic picks from field activity
F-2-07-NC.
- 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: String
- Point_and_Vector_Object_Count: 14
- 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: Faults
- Entity_Type_Definition: lines representing mapped faults
- Entity_Type_Definition_Source: This report
- Attribute:
-
- Attribute_Label: OBJECTID
- 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: Label
- Attribute_Definition: feature label
- Attribute_Definition_Source: This report
- Attribute_Domain_Values:
-
- Unrepresentable_Domain: text field containing feature names if they are named
- Attribute:
-
- Attribute_Label: RuleID
- Attribute_Definition: Representation rule identifier
- Attribute_Definition_Source: This report
- Attribute_Domain_Values:
-
- Unrepresentable_Domain:
-
This field contains the representation rule in the ArcGIS file geodatabase that applied dashed or solid lines to faults.
The line is dashed if faults are mapped in sediment and solid if they are mapped over rock or a visible scarp.
- Attribute:
-
- Attribute_Label: Shape_Length
- Attribute_Definition: Length of feature in internal units.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
-
- Unrepresentable_Domain: Positive real numbers that are automatically generated.
- Metadata_Reference_Information:
-
- Metadata_Date: 2013
- Metadata_Review_Date: 20140902
- 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 Mon May 18 16:04:47 2015