Identification_Information: Citation: Citation_Information: Originator: Witter, R.C. 1 Originator: Knudsen, K.L. 2 Originator: Sowers, J.M. 1 Originator: Wentworth, C.M. 3 Originator: Koehler, R.D. 1 Originator: Randolph, C.E. 1 Publication_Date: 2006 Title: Maps of Quaternary deposits and liquefaction susceptibility in the central San Francisco Bay region, California Edition: 1.0 Geospatial_Data_Presentation_Form: Series_Name U.S. Geological Survey Open File Report Issue_Identification 06-1037 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Other_Citation_Details: 1 - Wm. Lettis & Assoc., Inc. 2 - California Geological Survey 3 - U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2006/1037/ Description: Abstract: This report presents a map and database of Quaternary deposits and liquefaction susceptibility for the urban core of the San Francisco Bay region. It supercedes the equivalent area of U.S. Geological Survey Open-File Report 00-444 (Knudsen and others, 2000), which covers the larger 9-county San Francisco Bay region. The report consists of (1) a spatial database, (2) two small-scale colored maps (Quaternary deposits and liquefaction susceptibility), (3) a text describing the Quaternary map and liquefaction interpretation (part 3), and (4) a text introducing the report and describing the database (part 1). All parts of the report are digital; part 1 describes the database and digital files and how to obtain them by downloading across the internet. The nine counties surrounding San Francisco Bay straddle the San Andreas fault system, which exposes the region to serious earthquake hazard (Working Group on California Earthquake Probabilities, 1999). Much of the land adjacent to the Bay and the major rivers and streams is underlain by unconsolidated deposits that are particularly vulnerable to earthquake shaking and liquefaction of water-saturated granular sediment. This new map provides a consistent detailed treatment of the central part of the 9-county region in which much of the mapping of Open-File Report 00-444 was either at smaller (less detailed) scale or represented only preliminary revision of earlier work. Like Open-File Report 00-444, the current mapping uses geomorphic expression, pedogenic soils, inferred depositional environments, and geologic age to define and distinguish the map units. Further scrutiny of the factors controlling liquefaction susceptibility has led to some changes relative to Open-File Report 00-444: particularly the reclassification of San Francisco Bay mud (Qhbm) to have only MODERATE susceptibility and the rating of artificial fills according to the Quaternary map units inferred to underlie them (other than dams ? adf). The two colored maps provide a regional summary of the new mapping at a scale of 1:200,000, a scale that is sufficient to show the general distribution and relationships of the map units but not to distinguish the more detailed elements that are present in the database. The report is the product of cooperative work by the National Earthquake Hazards Reduction Program (NEHRP) and National Cooperative Geologic Mapping Program of the U.S. Geological Survey, William Lettis and & Associates, Inc. (WLA), and the California Geological Survey. An earlier version was submitted to the U.S. Geological Survey by WLA as a final report for a NEHRP grant (Witter and others, 2005). The mapping has been carried out by WLA geologists under contract to the NEHRP Earthquake Program (Grant 99-HQ-GR-0095) and by the California Geological Survey. Purpose: Map delineation of the different types and ages of Quaternary deposits supports evaluation of susceptibility to liquefaction, the immediate application of the work, but serves many other purposes as well. It provides a framework for interpreting the architecture and history of the Quaternary sedimentary basins, which is used in estimating earthquake shaking and modeling the groundwater system. The mapping is also useful in constraining the ages and histories of offsetting faults, in guiding geotechnical investigations, and in other engineering, geologic, and archeological applications. Supplemental_Information: Procedures_Used: The databases in this report were compiled in ARC/INFO, commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California), with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The files are in both uncompressed ARC export format (ARC/INFO version 7.x) and Arc View Shape format. The digital compilation was done in versions 7.x of ARC/INFO with version 3.x of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The Quaternary map information was digitized from stable originals of the geologic maps at 1:24,000 scale. The author manuscripts were scanned at 300 dots per inch. The scanned images were vectorized and transformed from scanner coordinates to projection coordinates in ARC/INFO with digital tics placed at quadrangle corners. The scanned lines were edited interactively by hand using ALACARTE, and unit boundaries were tagged as appropriate. Revisions: This is version 1.0 of the report. There have been no revisions to any part of the report. See the ASCII text file of06-1037_2a.txt (revision list) for more information about revisions. Reviews_Applied_to_Data: This report has undergone two scientific peer reviews, one digital database review, and review of the digital files for functionality. Related_Spatial_and_Tabular_Data_Sets: This report presents a map and database of Quaternary deposits and liquefaction susceptibility for the central San Francisco Bay region. The report consists of (1) a spatial database of one data layer (Quaternary deposits), (2) two small-scale colored maps (Quaternary deposits and liquefaction susceptibility), (3) a text describing the Quaternary map and liquefaction interpretation, and (4) the database description pamphlet. See the revision list (of06-1037_2x) or Open-File pamphlet (of06-1037_1x) for further details. Other_References_Cited: Other references cited are listed in the explanatory pamphlets (of06-1037_1 and of06-1037_3) Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20060215 Currentness_Reference: The date given is the publication date. The information in the report was current at the time of publication. Status: Progress: Released Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123 East_Bounding_Coordinate: -121.625 North_Bounding_Coordinate: 338.625 South_Bounding_Coordinate: 37.125 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Quaternary surficial deposits Theme_Keyword: Liquefaction susceptibility Theme_Keyword: Liquefaction Theme_Keyword: Earthquake ground effects Theme_Keyword: Earthquake ground failures Theme_Keyword: Digital spatial database Theme_Keyword: Vector data Theme_Keyword: Soils Place: Place_Keyword_Thesaurus: None Place_Keyword: United States of America Place_Keyword: California Place_Keyword: Solano County Place_Keyword: San Francisco County Place_Keyword: Sonoma County Place_Keyword: Marin County Place_Keyword: Napa County Place_Keyword: Contra Costa County Place_Keyword: Alameda County Place_Keyword: San Mateo County Place_Keyword: Santa Clara County Place_Keyword: San Francisco Bay Region Place_Keyword: San Francisco Bay Area Place_Keyword: central San Francisco Bay Region Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Artificial fill Stratum_Keyword: Artificial fill over San Francisco Bay Mud Stratum_Keyword: Dredge spoils Stratum_Keyword: Gravel quarry Stratum_Keyword: Artificial stream channel Stratum_Keyword: Modern stream channel deposits Stratum_Keyword: Alluvial fan deposits Stratum_Keyword: Alluvial fan levee deposits Stratum_Keyword: Stream terrace deposits Stratum_Keyword: Alluvial deposits Stratum_Keyword: Alluvial floodplain deposits Stratum_Keyword: Flood basin deposits Stratum_Keyword: Dune sand Stratum_Keyword: Beach sand Stratum_Keyword: San Francisco Bay Mud Stratum_Keyword: Basin deposits Stratum_Keyword: Alluvial fan-estuarine complex deposits Stratum_Keyword: Alluvial fan deposits, fine facies Stratum_Keyword: Alluvium, undifferentiated Stratum_Keyword: Marine terrace deposits Stratum_Keyword: Pediment deposits Stratum_Keyword: Bedrock Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Quaternary Temporal_Keyword: Pleistocene Temporal_Keyword: latest Pleistocene Temporal_Keyword: Holocene Access_Constraints: None Use_Constraints: Use is limited by the 1:24,000 scale spatial resolution of the data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Western Earth Surface Processes Team Contact_Person: Todd Fitzgibbon Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road, MS 973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Browse_Graphic: Data_Set_Credit: Geology by Robert C. Witter, Keith L. Knudsen, Janet M. Sowers, Carl M. Wentworth, Richard D. Koehler, and Carolyn E. Randolph. Digital database by Carl M. Wentworth, Suzanna K. Brooks, and Kathleen D. Gans Security_Information: Security_Classification_System: None Security_Classification: Unclassified Security_Handling_Description: None Native_Data_Set_Environment: Solaris 6 and 7, UNIX, Windows XP, Microsoft Word, Microsoft Excel, Acrobat Distiller, ARC/INFO version 7.x Cross_Reference: Citation_Information: Originator: Publication_Date: Geospatial_Data_Presentation_Form: Series_Information: Series_Name: Issue_Identification: Other_Citation_Details: Online_Linkage: Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: See Entity_Attribute_Information Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: See Explanation Attribute_Accuracy_Explanation: Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section. Logical_Consistency_Report: Polygon and chain-node topology present Completeness_Report: The report describes the Quaternary geology of the map area at 1:24,000 scale; map graphics at 1:200,000 scale. See Open-File pamphlet of06-1037_1. Positional_Accuracy: Horizontal_Positional_Accuracy: Vertical_Positional_Accuracy: Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Publication_Date: Series_Information: Series_Name: Issue_Identification: Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Process_Step: Process_Description: Geologic linework was scanned, converted to vector data, and edited on-screen to repair errors visible at map scale. Polygon topology was created and each polygon tagged on-screen. Plotfiles were created in ArcPlot. Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: C:\DOCUME~1\cwent\LOCALS~1\Temp\xml19.tmp Process_Step: Process_Description: Metadata imported. 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Attribute: Attribute_Label: SF-QUAT2-ID Attribute_Definition: User-assigned feature number Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Integer Enumerated_Domain_Value_Definition: Set equal to SF-QUAT2# Enumerated_Domain_Value_Definition_Source: author Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: PTYPE Attribute_Definition: Geologic unit label Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ac Enumerated_Domain_Value_Definition: Artificial stream channel (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: acf Enumerated_Domain_Value_Definition: Artificial channel fill (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: adf Enumerated_Domain_Value_Definition: Artificial dam fill (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: af Enumerated_Domain_Value_Definition: Artificial fill (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: afem Enumerated_Domain_Value_Definition: Artificial fill over estuarine mud (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: alf Enumerated_Domain_Value_Definition: Artificial levee fill (historical) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: br Enumerated_Domain_Value_Definition: pre-Quaternary deposits and bedrock Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: br? Enumerated_Domain_Value_Definition: pre-Quaternary deposits and bedrock (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: gq Enumerated_Domain_Value_Definition: Gravel quarries and percolation ponds Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: H2O Enumerated_Domain_Value_Definition: open water Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: nm Enumerated_Domain_Value_Definition: not mapped Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene alluvium undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qa? Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene alluvium undifferentiated (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qb Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene basin deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qbt Enumerated_Domain_Value_Definition: Pleistocene bay terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qbt? Enumerated_Domain_Value_Definition: Pleistocene bay terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qds Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene dune sand Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qf Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocenealluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qha Enumerated_Domain_Value_Definition: Holocene alluvium undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qha? Enumerated_Domain_Value_Definition: Holocene alluvium undifferentiated (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhay Enumerated_Domain_Value_Definition: Latest Holocene alluvial deposits Undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhb Enumerated_Domain_Value_Definition: Holocene basin deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhbm Enumerated_Domain_Value_Definition: Holocene San Francisco Bay Mud Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhbs Enumerated_Domain_Value_Definition: Latest Holocene beach sand Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhc Enumerated_Domain_Value_Definition: Modern stream channel deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhds Enumerated_Domain_Value_Definition: Holocene dune sand Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhed Enumerated_Domain_Value_Definition: Holocene estuarine delta deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhf Enumerated_Domain_Value_Definition: Holocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhf? Enumerated_Domain_Value_Definition: Holocene alluvial fan deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhf1 Enumerated_Domain_Value_Definition: Younger Holocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhf2 Enumerated_Domain_Value_Definition: Older Holocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhf3 Enumerated_Domain_Value_Definition: Oldest Holocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhfe Enumerated_Domain_Value_Definition: Holocene alluvial fan-estuarine complex deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhff Enumerated_Domain_Value_Definition: Holocene alluvial fan deposits fine facies Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhfy Enumerated_Domain_Value_Definition: Latest Holocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhl Enumerated_Domain_Value_Definition: Holocene alluvial fan levee deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhl1 Enumerated_Domain_Value_Definition: Younger Holocene alluvial fan levee deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhl2 Enumerated_Domain_Value_Definition: Older Holocene alluvial fan levee deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhl3 Enumerated_Domain_Value_Definition: Oldest Holocene alluvial fan levee deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhly Enumerated_Domain_Value_Definition: Latest Holocene alluvial fan levee deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qht Enumerated_Domain_Value_Definition: Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qht1 Enumerated_Domain_Value_Definition: Younger Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qht2 Enumerated_Domain_Value_Definition: Older Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhty Enumerated_Domain_Value_Definition: Latest Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhty? Enumerated_Domain_Value_Definition: Latest Holocene stream terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhty1 Enumerated_Domain_Value_Definition: Younger latest Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qhty2 Enumerated_Domain_Value_Definition: Older latest Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt Enumerated_Domain_Value_Definition: Pleistocene marine terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt? Enumerated_Domain_Value_Definition: Pleistocene marine terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt1 Enumerated_Domain_Value_Definition: Youngest (of 4) Pleistocene marine terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt2 Enumerated_Domain_Value_Definition: Second youngest (of 4) Pleistocene marine terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt2? Enumerated_Domain_Value_Definition: Second youngest (of 4) Pleistocene marine terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt3 Enumerated_Domain_Value_Definition: Second oldest (of 4) Pleistocene marine terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt4 Enumerated_Domain_Value_Definition: Oldest (of 4) Pleistocene marine terrace Deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qmt4? Enumerated_Domain_Value_Definition: Oldest (of 4) Pleistocene marine terrace Deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Early to late Pleistocene alluvial deposits undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qoa? Enumerated_Domain_Value_Definition: Early to late Pleistocene alluvial deposits undifferentiated (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qoa1 Enumerated_Domain_Value_Definition: Younger early to late Pleistocene alluvial deposits undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qoa2 Enumerated_Domain_Value_Definition: Older early to late Pleistocene alluvial deposits undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qof Enumerated_Domain_Value_Definition: Early to late Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qof? Enumerated_Domain_Value_Definition: Early to late Pleistocene alluvial fan deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qop Enumerated_Domain_Value_Definition: Early to late Pleistocene pediment deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qot Enumerated_Domain_Value_Definition: Early to late Pleistocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qot1 Enumerated_Domain_Value_Definition: Younger early to late Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qot2 Enumerated_Domain_Value_Definition: Older early to late Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpa Enumerated_Domain_Value_Definition: Latest Pleistocenealluvium undifferentiated Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpa? Enumerated_Domain_Value_Definition: Latest Pleistocenealluvium undifferentiated (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpf Enumerated_Domain_Value_Definition: Latest Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpf? Enumerated_Domain_Value_Definition: Latest Pleistocene alluvial fan deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpf1 Enumerated_Domain_Value_Definition: Younger latest Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpf2 Enumerated_Domain_Value_Definition: Older latest Pleistocene alluvial fan deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpt Enumerated_Domain_Value_Definition: Latest Pleistocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qpt? Enumerated_Domain_Value_Definition: Latest Pleistocene stream terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qt? Enumerated_Domain_Value_Definition: Latest Pleistocene to Holocene stream terrace deposits (queried) Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qt1 Enumerated_Domain_Value_Definition: Younger latest Pleistocene to Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: Qt2 Enumerated_Domain_Value_Definition: Older latest Pleistocene to Holocene stream terrace deposits Enumerated_Domain_Value_Definition_Source: author Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: PTYPE2 Attribute_Definition: Natural material inferred to underlie artificial fills and channels (af, acf, alf, ac, and afem) other than dams (adf). Value consists of one or more unit labels (for ex., Qha, Qha-br, Qha-Qhf-br) representing the underlying unit; multiple values are used where boundaries of buried units cannot be delineated. For other map units, PTYPE2 = PTYPE. Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: H2O Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain: Enumerated_Domain_Value: Qa-Qha Enumerated_Domain: Enumerated_Domain_Value: Qa-Qhay Enumerated_Domain: Enumerated_Domain_Value: Qa-Qht Enumerated_Domain: Enumerated_Domain_Value: Qa-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qa-br Enumerated_Domain: Enumerated_Domain_Value: Qa? Enumerated_Domain: Enumerated_Domain_Value: Qb Enumerated_Domain: Enumerated_Domain_Value: Qbt Enumerated_Domain: Enumerated_Domain_Value: Qbt-Qha Enumerated_Domain: Enumerated_Domain_Value: Qbt? Enumerated_Domain: Enumerated_Domain_Value: Qds Enumerated_Domain: Enumerated_Domain_Value: Qds-Qhbs Enumerated_Domain: Enumerated_Domain_Value: Qds-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qf Enumerated_Domain: Enumerated_Domain_Value: Qf-Qhbm Enumerated_Domain: Enumerated_Domain_Value: Qf-Qhc Enumerated_Domain: Enumerated_Domain_Value: Qf-Qhty2 Enumerated_Domain: Enumerated_Domain_Value: Qf-Qof Enumerated_Domain: Enumerated_Domain_Value: Qf-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qha Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhay Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhb Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhc Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhf Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhff Enumerated_Domain: Enumerated_Domain_Value: Qha-Qht Enumerated_Domain: Enumerated_Domain_Value: Qha-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qha-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qha-Qoa2-br Enumerated_Domain: Enumerated_Domain_Value: Qha-Qof Enumerated_Domain: Enumerated_Domain_Value: Qha-Qpa Enumerated_Domain: Enumerated_Domain_Value: Qha-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qha-br Enumerated_Domain: Enumerated_Domain_Value: Qha? Enumerated_Domain: Enumerated_Domain_Value: Qhay Enumerated_Domain: Enumerated_Domain_Value: Qhay-Qhb Enumerated_Domain: Enumerated_Domain_Value: Qhay-Qhc Enumerated_Domain: Enumerated_Domain_Value: Qhay-br Enumerated_Domain: Enumerated_Domain_Value: Qhb Enumerated_Domain: Enumerated_Domain_Value: Qhb-Qhc Enumerated_Domain: Enumerated_Domain_Value: Qhbm Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qhf Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qhff Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qhly Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qof1 Enumerated_Domain: Enumerated_Domain_Value: Qhbm-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qhbm-br Enumerated_Domain: Enumerated_Domain_Value: Qhbs Enumerated_Domain: Enumerated_Domain_Value: Qhbs-Qds Enumerated_Domain: Enumerated_Domain_Value: Qhbs-Qhds Enumerated_Domain: Enumerated_Domain_Value: Qhc Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhf Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhf-br Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhff Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhl Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhly Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhly-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qht Enumerated_Domain: Enumerated_Domain_Value: Qhc-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhc-af Enumerated_Domain: Enumerated_Domain_Value: Qhc-br Enumerated_Domain: Enumerated_Domain_Value: Qhc-gq Enumerated_Domain: Enumerated_Domain_Value: Qhds Enumerated_Domain: Enumerated_Domain_Value: Qhed Enumerated_Domain: Enumerated_Domain_Value: Qhf Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qhff Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qhfy Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qhl Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qhf-Qt Enumerated_Domain: Enumerated_Domain_Value: Qhf-br Enumerated_Domain: Enumerated_Domain_Value: Qhf-gq Enumerated_Domain: Enumerated_Domain_Value: Qhf1 Enumerated_Domain: Enumerated_Domain_Value: Qhf2 Enumerated_Domain: Enumerated_Domain_Value: Qhf2-Qpf2 Enumerated_Domain: Enumerated_Domain_Value: Qhf3 Enumerated_Domain: Enumerated_Domain_Value: Qhf? Enumerated_Domain: Enumerated_Domain_Value: Qhfe Enumerated_Domain: Enumerated_Domain_Value: Qhff Enumerated_Domain: Enumerated_Domain_Value: Qhff-Qhl Enumerated_Domain: Enumerated_Domain_Value: Qhff-Qoa Enumerated_Domain: Enumerated_Domain_Value: Qhff-Qpa Enumerated_Domain: Enumerated_Domain_Value: Qhff-br Enumerated_Domain: Enumerated_Domain_Value: Qhfy Enumerated_Domain: Enumerated_Domain_Value: Qhl Enumerated_Domain: Enumerated_Domain_Value: Qhl-Qhly Enumerated_Domain: Enumerated_Domain_Value: Qhl-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhl-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qhl-br Enumerated_Domain: Enumerated_Domain_Value: Qhl1 Enumerated_Domain: Enumerated_Domain_Value: Qhl2 Enumerated_Domain: Enumerated_Domain_Value: Qhl3 Enumerated_Domain: Enumerated_Domain_Value: Qhly Enumerated_Domain: Enumerated_Domain_Value: Qhly-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhly-br Enumerated_Domain: Enumerated_Domain_Value: Qht Enumerated_Domain: Enumerated_Domain_Value: Qht-Qhty Enumerated_Domain: Enumerated_Domain_Value: Qht-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qht-Qpt Enumerated_Domain: Enumerated_Domain_Value: Qht-br Enumerated_Domain: Enumerated_Domain_Value: Qht-gq Enumerated_Domain: Enumerated_Domain_Value: Qht1 Enumerated_Domain: Enumerated_Domain_Value: Qht2 Enumerated_Domain: Enumerated_Domain_Value: Qhty Enumerated_Domain: Enumerated_Domain_Value: Qhty-Qpf Enumerated_Domain: Enumerated_Domain_Value: Qhty-gq Enumerated_Domain: Enumerated_Domain_Value: Qhty1 Enumerated_Domain: Enumerated_Domain_Value: Q Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LIQ Attribute_Definition: Liquefaction susceptibility Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: H Enumerated_Domain_Value_Definition: High Susceptibility Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: L Enumerated_Domain_Value_Definition: Low Susceptibility Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: M Enumerated_Domain_Value_Definition: Moderate Susceptibility Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: NM Enumerated_Domain_Value_Definition: Not mapped Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: VH Enumerated_Domain_Value_Definition: Very High Susceptibility Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: VL Enumerated_Domain_Value_Definition: Very Low Susceptibility Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: W Enumerated_Domain_Value_Definition: water Enumerated_Domain_Value_Definition_Source: author Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LIQ-SOURCE Attribute_Definition: 1 where custom LIQ value assigned, otherwise 0 Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: integer Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SF-QUAT2-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Detailed_Description: Entity_Type: Entity_Type_Label: SF-QUAT2.AAT Entity_Type_Definition: Attribute table of SF-QUAT2. Entity_Type_Definition_Source: ARC/INFO Attribute: Attribute_Label: FNODE# Attribute_Definition: Internal number of from-node Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal number of to-node Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal number of poly to left of arc Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal number of poly to right of arc Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of arc in coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Positive real numbers Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SF-QUAT2# Attribute_Definition: Internal feature number Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Attribute: Attribute_Label: SF-QUAT2-ID Attribute_Definition: User-assigned feature number Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Integer Enumerated_Domain_Value_Definition: Set equal to SF-QUAT2# Enumerated_Domain_Value_Definition_Source: author Attribute: Attribute_Label: LTYPE Attribute_Definition: Type of geologic or geographic feature denoted by a line in the database. Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value_Definition: depositional contact, location uncertainty greater than about +/- 100 m Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: contact, well located Enumerated_Domain_Value_Definition: depositional contact, location uncertainty less than about +/- 100 m Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: contact, concealed Enumerated_Domain_Value_Definition: depositional contact concealed beneath water, fill, or levee Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: county line Enumerated_Domain_Value_Definition: Boundary of nine-county region, from 1:24,000 USGS DLGs and published paper topographic maps Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value_Definition: Exterior boundary of 1:24,000 quadrangles composing the map area Enumerated_Domain: Enumerated_Domain_Value: scratch boundary Enumerated_Domain_Value_Definition: Enumerated_Domain_Value_Definition_Source author Enumerated_Domain: Enumerated_Domain_Value: water boundary Enumerated_Domain_Value_Definition: Boundary of open water from 1:24,000 USGS DLGs and published paper topographic maps Enumerated_Domain_Value_Definition_Source: author Enumerated_Domain: Enumerated_Domain_Value: water boundary, 1800s Enumerated_Domain_Value_Definition: Landward margin of tidal marsh bordering San Francisco Bay in the late 19th century, mainly from Nichols and Wright, 1971 Enumerated_Domain_Value_Definition_Source: author Attribute: Attribute_Label: LIQ Attribute: Attribute_Label: LIQ-SOURCE Overview_Description: Entity_and_Attribute_Overview: The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California). Almost all the attributes in the various attribute tables of the coverages included in the report are set or calculated by Arc/Info. The exceptions are "coveragename"-ID, LTYPE, PTYPE, and LIQ. "coveragename"-ID is set equal to the sequential # ID integers. LTYPE and PTYPE are author-added items to the coverage AAT or PAT that are used to describe the type of line (LTYPE), or area (PTYPE). Each of these items has WIDTH 35, OUTPUT 35, TYPE C. LIQ is an author-added item that records liquefaction susceptibility ratings for Quaternary polygons. It has WIDTH 8, OUTPUT 8, TYPE C. LIQ-SOURCE is an author-added item that records custom liquefaction assignments for Quaternary polygons. It has WIDTH 1, OUTPUT 1, TYPE I. Entity_and_Attribute_Detail_Citation: This report combined with the explanatory pamphlet or pamphlets: of06-1037_1, of06-1037_2 and of06-1037_3. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Address: Address_Type: web address Address: http://pubs.usgs.gov/of/2006/of06-1037/ Contact_Instructions: Please contact through http://pubs.usgs.gov/of/2006/of06-1037/. Resource_Description: This report presents a map and database of Quaternary deposits and liquefaction susceptibility for the central San Francisco Bay region. The report consists of (1) a spatial database of one data layer (Quaternary deposits), (2) two small-scale colored maps (Quaternary deposits and liquefaction susceptibility), (3) a text describing the Quaternary map and liquefaction interpretation, and (4) the database description pamphlet. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PostScript plotfile package, of06-1037_10a.ps.gz Format_Version_Number: 1.0 Format_Specification: PostScript files generated by Arc/Info v. 7.x Format_Information_Content: 4 PostScript plotfiles, one each for the Quaternary geology map, the liquefaction map, the Open-File pamphlet, and the Description of Mapping. File_Decompression_Technique: TAR and gzip Transfer_Size: see the Open-File pamphlet (of06-1037_1x) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Metadata_Reference_Information: Metadata_Date: 20060213 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: C.M. Wentworth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Emeritus Contact_Address: Address_Type: Mailing Address: 345 Middlefield Rd., MS 977 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4950 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: Local Time Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile