Metadata: Identification_Information: Citation: Citation_Information: Originator: Keith L. Knudsen Originator: Jay S. Noller Originator: Janet M. Sowers Originator: William R. Lettis Publication_Date: 1997 Title: Quaternary Geology and Liquefaction Susceptibility, San Francisco, California 1:100,000 Quadrangle: A digital database Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 97-715 Online_Linkage: http://pubs.usgs.gov/of/1997/of97-715/ Description: Abstract: In this study, we develop a liquefaction susceptibility map of the San Francisco 1:100,000 quadrangle using Quaternary geologic mapping, historical liquefaction information, groundwater data, and previous studies. Purpose: Earthquake-induced liquefaction has historically caused loss of life and damage to property and infrastructure. Observations of the effects of historical large-magnitude earthquakes show that the distribution of liquefaction phenomena is not random. Liquefaction is restricted to areas underlain by saturated, loose, cohesionless sand and silt. Areas susceptible to liquefaction can be delineated on the basis of geologic, geomorphic, and hydrologic mapping and map analyses (e.g., Youd and Perkins, 1987; Tinsley and Holzer, 1990; Sowers and others, 1995). Once liquefaction susceptibility zones are delineated, public agencies, private organizations, and individuals can prepare for and mitigate liquefaction hazards in these zones. The study area includes the San Francisco Peninsula, the eastern San Francisco Bay area, and part of the northern San Francisco Bay area, including the cities of Burlingame, Concord, Oakland, Richmond, San Francisco, San Mateo, San Rafael, and Walnut Creek (Figure 1). Holocene estuarine deposits, Holocene stream deposits, Holocene eolian and beach deposits, and artificial fill are widely present in the region (Plate 1), and are typically the geologic materials most susceptible to liquefaction. Major faults capable of producing large earthquakes cross the study area, including the Concord, Hayward, San Andreas, and San Gregorio faults (Figure 1). These earthquakes expose the entire study area to long-duration ground motions with peak ground accelerations in excess of 0.2 g, sufficient to trigger liquefaction in highly susceptible natural deposits and artificial fill. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123.0 East_Bounding_Coordinate: -122.0 North_Bounding_Coordinate: 38.0 South_Bounding_Coordinate: 37.5 Access_Constraints: none Use_Constraints: none Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geology Theme_Keyword: geologic maps Theme_Keyword: liquefaction Theme_Keyword: hazards Theme_Keyword: unconsolidated deposits Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented Theme_Keyword: 3400 - Graphical Theme_Keyword: 3100 - Vector Theme_Keyword: 3420 - PostScript Theme_Keyword: 3110 - ESRI Theme_Keyword: 3112 - export Theme_Keyword: 1100 - Geology Theme_Keyword: 1101 - General Theme_Keyword: 1500 - Hazards Theme_Keyword: 1501 - Earthquakes Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f06081 = San Mateo Place_Keyword: f06001 = Alameda Place_Keyword: f06013 = Contra Costa Place_Keyword: f06041 = Marin Place_Keyword: f06075 = San Francisco Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Keith L. Knudsen Contact_Organization: William Lettis & Associates, Inc. Contact_Address: Address_Type: mailing Address: William Lettis & Associates, Inc., 1777 Botelho Dr., Suite 262 City: Walnut Creek State_or_Province: CA Postal_Code: 94596 Country: USA Contact_Voice_Telephone: (510) 256-6070 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1997/of97-715/sf_plate1.pdf Browse_Graphic_File_Description: PDF representation of quaternary geology map of San Francisco, Califonia Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1997/of97-715/sf_plate2.pdf Browse_Graphic_File_Description: PDF representation of liquefaction susceptibility map of San Francisco, Califonia Browse_Graphic_File_Type: PDF Data_Set_Credit: Carl M. Wentworth, Todd T. Fitzgibbon, and Geoffrey A. Phelps graciously provided assistance with Alacarte and ARC/INFO. The scanning and editing of the digital maps was done by Scott E. Graham, Carolyn E. Randolph and Thomas E. May. Earl E. Brabb provided much helpful advice and feedback, as well as arranging for material support for the project. Data_Quality_Information: Logical_Consistency_Report: This digital map database, compiled from previously unpublished data, and new mapping by the authors, represents the general distribution of surficial deposits in the San Francisco bay region. Completeness_Report: Complete Lineage: Process_Step: Process_Description: The geologic map information was digitized from stable original of the geologic map at 1:100,000 scale. The author manuscripts (ink on greenline) were scanned using a Anatech monochrome scanner with a resolution of 800 dots per inch. The scanned images were vectorized and transformed from scanner coordinates to projection coordinates with digital tics placed by hand at map corners. The scanned lines were edited interactively by hand using ALACARTE, color boundaries were tagged as appropriate, and scanning artifacts visible at 1:100,000 were removed. Process_Step: Process_Description: Creation of original metadata record Process_Date: 20000801 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jennifer Lenz Contact_Organization: US Geological Survey Contact_Address: Address_Type: mailing Address: 12201 Surise Valley Drive, Mail Stop 918 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6974 Contact_Facsimile_Telephone: 703-648-6560 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: unknown Ordinate_Resolution: unknown Planar_Distance_Units: meters Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: SF-GEOL.PAT Entity_Type_Definition: Geologic map units Entity_Type_Definition_Source: OFR-97-715 Attribute: Attribute_Label: PTYPE Attribute_Definition: Polygon type Attribute_Definition_Source: OFR-97-715 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: af Enumerated_Domain_Value_Definition: Artificial fill Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhc Enumerated_Domain_Value_Definition: Modern stream channel deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhbm Enumerated_Domain_Value_Definition: Holocene bay mud Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhs Enumerated_Domain_Value_Definition: Holocene dune and beach sand Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhb Enumerated_Domain_Value_Definition: Holocene basin deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qht Enumerated_Domain_Value_Definition: Holocene terrace deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhf Enumerated_Domain_Value_Definition: Holocene alluvial fan deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qhl Enumerated_Domain_Value_Definition: Holocene alluvial fan levee deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qha Enumerated_Domain_Value_Definition: Holocene alluvium, undifferentiated Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qf Enumerated_Domain_Value_Definition: Late Pleistocene to Holocene fan deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain_Value_Definition: Late Pleistocene to Holocene alluvium, undifferentiated Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qpf Enumerated_Domain_Value_Definition: Late Pleistocene alluvial fan deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qpa Enumerated_Domain_Value_Definition: Late Pleistocene alluvium, undifferentiated Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qps Enumerated_Domain_Value_Definition: Late Pleistocene dune sands Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmt Enumerated_Domain_Value_Definition: Pleistocene marine terrace deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Early or middle Pleistocene undifferentiated alluvial deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: br Enumerated_Domain_Value_Definition: Pre-Quaternary deposits and bedrock, undifferentiated Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: w Enumerated_Domain_Value_Definition: Water Detailed_Description: Entity_Type: Entity_Type_Label: SF-GEOL.AAT Entity_Type_Definition: Linear features on geologic map Entity_Type_Definition_Source: OFR-97-715 Attribute: Attribute_Label: LTYPE Attribute_Definition: Line type Attribute_Definition_Source: OFR-97-715 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Observed contact Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value_Definition: Contact whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, concealed Enumerated_Domain_Value_Definition: Concealed contact whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, inferred Enumerated_Domain_Value_Definition: Contact whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value_Definition: Observed fault Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, approx. located Enumerated_Domain_Value_Definition: Fault whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value_Definition: Concealed fault whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: water boundary Enumerated_Domain_Value_Definition: Boundary of area of water Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value_Definition: Extent of mapped area Detailed_Description: Entity_Type: Entity_Type_Label: SF-GEOL.PAT Entity_Type_Definition: Geologic units at specific locations (same attributes as polygon coverage SF-GEOL.PAT) Entity_Type_Definition_Source: OFR-97-715 Detailed_Description: Entity_Type: Entity_Type_Label: SF-HIST.PAT Entity_Type_Definition: Historical liquefaction events Entity_Type_Definition_Source: OFR-97-715 Attribute: Attribute_Label: PTTYPE Attribute_Definition: Point type Attribute_Definition_Source: OFR-97-715 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ground Settlement Enumerated_Domain_Value_Definition: Pre-Loma Prieta Earthquake ground settlement Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ground Settlement 1989 Enumerated_Domain_Value_Definition: Ground settlement during the Loma Prieta Earthquake Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Lateral Spreading Enumerated_Domain_Value_Definition: Pre-Loma Prieta earthquake lateral spreading Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Lateral spreading 1989 Enumerated_Domain_Value_Definition: Lateral spreading during the Loma Prieta earthquake Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sand boils Enumerated_Domain_Value_Definition: Pre-Loma Prieta earthquake sand boil Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sand boils and/or sand intrusion Enumerated_Domain_Value_Definition: Sand boils and/or sand intrusion during the Loma Prieta earthquake Detailed_Description: Entity_Type: Entity_Type_Label: SF-LIQU.PAT Entity_Type_Definition: susceptibility of deposits to liquefaction as a function of groundwater depth within that deposit Entity_Type_Definition_Source: OFR-97-715 Attribute: Attribute_Label: LIQPOT Attribute_Definition: Liquefaction potential Attribute_Definition_Source: OFR-97-715 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: H2O Enumerated_Domain_Value_Definition: Area of water Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: vh Enumerated_Domain_Value_Definition: very high liquefactoin susceptibility Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: h Enumerated_Domain_Value_Definition: High liquefaction susceptibility Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: m Enumerated_Domain_Value_Definition: moderate liquefaction susceptibility Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: l Enumerated_Domain_Value_Definition: Low liquefaction susceptibility Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: vl Enumerated_Domain_Value_Definition: Very low to none liquefaction susceptibility Detailed_Description: Entity_Type: Entity_Type_Label: SF-LIQU.AAT Entity_Type_Definition: Linear features on liquefaction susceptibility map (same attributes as arc coverage SF-GEOL.AAT) Entity_Type_Definition_Source: OFR-97-715 Detailed_Description: Entity_Type: Entity_Type_Label: SF-LIQU.PAT Entity_Type_Definition: Liquefaction susceptibility at specific location (same attributes as polygon coverage SF-LIQU.PAT) Entity_Type_Definition_Source: OFR-97-715 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing Address: Box 25286, Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80255-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 1-303-202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: US Geological Survey Open-File Report 97-715 Distribution_Liability: This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This database, identified as "Quaternary Geology and Liquefaction Susceptibility, San Francisco, California 1:100,000 Quadrangle: A digital 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. Standard_Order_Process: Non-digital_Form: Map can be downloaded as a 14 megabyte PostScript file from http://pubs.usgs.gov/of/1997/of97-715/sf_map.tar.gz Map can also be downloaded as two files (15.5 megabytes collectively) PDF files from http://pubs.usgs.gov/of/1997/of97-715/sf_plate1.pdf and Fees: none Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x Format_Information_Content: Depositional contacts, faults, and unit labels, Liquefaction susceptibility, Historical liquefaction events, base maps File_Decompression_Technique: gzip and tar Transfer_Size: 14 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1997/of97-715/sf_data.tar.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20160205 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998