Faults--Offshore of San Francisco Map Area, California

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

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:

Citation_Information:

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:

California State Waters Map Series--Offshore of San Francisco Map Area, California

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: Open-File Report
Issue_Identification: OFR 2015-1068

Publication_Information:

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:

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/>

Description:

Abstract:: 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:: 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:: 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:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2007
Ending_Date: 2010

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.62
East_Bounding_Coordinate: -122.51
North_Bounding_Coordinate: 37.86
South_Bounding_Coordinate: 37.70

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: 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:

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/OffshoreSanFrancisco/images/Folds_OffshoreSanFrancisco.jpg>
Browse_Graphic_File_Description: Folds offshore San Francisco.
Browse_Graphic_File_Type: JPEG

Data_Quality_Information:

Logical_Consistency_Report:

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:

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:: 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:

Originator:

U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP)

Publication_Date: 2013

Title:

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:

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 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:

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