Quaternary geology and liquefaction susceptibility, Napa, California 1:100,000 quadrangle: A digital database

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Janet M. Sowers
Originator: Jay S. Noller
Originator: William R. Lettis
Publication_Date: 1998
Title:

Quaternary geology and liquefaction susceptibility, Napa, 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: 98-460

Online_Linkage: http://pubs.usgs.gov/of/1998/of98-460/

Description:

Abstract:

This Open-File report consists of a digital geologic map database and associated digital plot files and text files, revised from a hard copy by Sowers and others (1995). This digital map database provides current information on Quaternary geology and liquefaction susceptibility of the Napa, California, 1:100,000 quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey.

Purpose:

Earthquake-induced ground failures such as liquefaction have historically brought 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 loose, cohesionless sands and silts that are saturated with water. These areas can be delineated on the basis of thorough geologic, geomorphic, and hydrologic mapping and map analysis. Once potential liquefaction zones are delineated, appropriate public and private agencies can prepare for and mitigate seismic hazard in these zones. In this study, we create a liquefaction susceptibility map of the Napa 1:100,000 quadrangle using Quaternary geologic mapping, analysis of historical liquefaction information, groundwater data, and data from other studies.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Currentness_Reference: publication date of digital map database

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: 38.5
South_Bounding_Coordinate: 38.0

Access_Constraints: none
Use_Constraints: none
Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geologic maps
Theme_Keyword: geologic structure
Theme_Keyword: liquefaction
Theme_Keyword: hazards
Theme_Keyword: surficial geoologic units
Theme_Keyword: Quaternary
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: f06041 = Marin
Place_Keyword: f06097 = Sonoma
Place_Keyword: f06095 = Solano
Place_Keyword: f06055 = Napa
Place_Keyword: f06113 = Yolo

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Janet M. Sowers
Contact_Organization: William Lettis & Associates, Inc.

Contact_Address:

Address_Type: mailing
Address: Willam Lettis & Associates, Inc., 1777 Botelho Dr., Suite 262
City: Walnut Creek
State_or_Province: CA
Postal_Code: 94596
Country: USA

Contact_Voice_Telephone: (925)256-6070
Contact_Facsimile_Telephone: (925)256-6076
Contact_Electronic_Mail_Address: info@lettis.com

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1998/of98-460/na_plate1.pdf
Browse_Graphic_File_Description: PDF representation of the Quaternary geologic map sheet.
Browse_Graphic_File_Type: PDF

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1998/of98-460/na_plate2.pdf
Browse_Graphic_File_Description: PDF representation of the liqeuefaction map sheet.
Browse_Graphic_File_Type: PDF

Native_Data_Set_Environment: ARC/INFO version 7.0.4
Data_Set_Credit:

We thank the various people and agencies who provided access to borehole logs and other information on local geology. These include the California Department of Transportation, Wayne Wirick of the City of Sonoma, Sue Kelley of the City of Sebastopol, Roland Brust and Joe Gaffney of the City of Rohnert Park, Maurice Magsamem of the City of Santa Rosa, Janette Alm of CH2MHill, Anthony Quicho of the City of Martinez, Albert Hurd of the City of Fairfield, Gilbert Yau of the City of Vallejo, and Don Cardwell of the City of Napa.
Assistance in field work and map compilation was provided by Jeff Unruh, Meg Schram, Steve Thompson, Tina Wickens, Raymond Huang, and Colleen Haraden of William Lettis & Associates, Inc. We thank Edward Helley for assistance in obtaining reports, maps, and photography of the study area, and John Tinsley and Chuck Real for helpful discussions. Earl Brabb provided guidance during the review process and made the USGS publication of this map possible. John Tinsley and Edward Helley reviewed the manuscript.
This research was supported by the U. S. Geological Survey (USGS), Department of the Interior, under USGS award number 14-08-0001-G2129. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U. S. Government.

Data_Quality_Information:

Logical_Consistency_Report:

This digital map database, compiled from previously published data, and new mapping by the authors, represents the general distribution of surficial deposits in the Napa region.

Completeness_Report:

Only surficial deposits. All bedrock is mapped as undifferentiated.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Sowers, J.M.
Originator: Noller, J.S.
Originator: Lettis, W.R.
Publication_Date: 1995
Title:

Maps showing Quaternary geology and liquefaction susceptibility in the Napa, California, 1:100,000 sheet

Geospatial_Data_Presentation_Form: map
Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: OFR-95-205

Source_Scale_Denominator: 100,000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Sowers and others (1995)
Source_Contribution: The digital map database was revised from this hard copy.

Process_Step:

Process_Description:

Digital Compilation The geologic map information was digitized from stable original of the geologic map at 1:100,000 scale. The author manuscripts (pencil on mylar) were scanned using a Altek 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.
Base Maps Base Map layers were prepared from scale-stable printing negatives of the U.S. Geological Survey Napa, California 1:100,000 topographic maps, which have a 50 meter contour interval. Scanned and vectorized images were transformed from scanner coordinates to projection coordinates with digital tics placed by hand at map corners. The images were then trimmed interactively by hand using ALACARTE to conform to the area of the geologic coverages, and the four portions were combined.

Process_Step:

Process_Description: Creation of original metadata record
Process_Date: 20000724
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: NA-GEOL.PAT
Entity_Type_Definition: Geologic map units
Entity_Type_Definition_Source: OFR-98-460

Attribute:

Attribute_Label: PTYPE
Attribute_Definition: Polygon type
Attribute_Definition_Source: OFR-98-460
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: af
Enumerated_Domain_Value_Definition: Artificial fill. Material constructed or deposited by humans.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qhr
Enumerated_Domain_Value_Definition: Estuarine deposits (bay mud)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qhr/af
Enumerated_Domain_Value_Definition: Estuarine deposits with areas of artificial fill

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qhi
Enumerated_Domain_Value_Definition: Latest Holocene alluvial deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qhi/Qhb
Enumerated_Domain_Value_Definition:

Latest Holocene flood plain and basin deposits along Laguna de Santa Rosa

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 fan 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: Qs
Enumerated_Domain_Value_Definition: Late Pleistocene to Holocene dune sands

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qt
Enumerated_Domain_Value_Definition: Late Pleistocene to Holocene terrace deposits

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: Qpt
Enumerated_Domain_Value_Definition: Late Pleistocene terrace deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qpf
Enumerated_Domain_Value_Definition: Late Pleistocene 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: Qpm
Enumerated_Domain_Value_Definition: Late Pleistocene marine terrace deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qoa
Enumerated_Domain_Value_Definition: Early or middle Pleistocene fan or terrace deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qom
Enumerated_Domain_Value_Definition: Early to middle Pleistocene marine terrace 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

Attribute:

Attribute_Label: LIQ
Attribute_Definition: Liquefaction susceptibility
Attribute_Definition_Source: OFR-98-460
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: H
Enumerated_Domain_Value_Definition: High susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: L
Enumerated_Domain_Value_Definition: Low susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: L-H
Enumerated_Domain_Value_Definition: low to high susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: L-M
Enumerated_Domain_Value_Definition: Low to Moderate susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: M
Enumerated_Domain_Value_Definition: Moderate susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: M-H
Enumerated_Domain_Value_Definition: Moderate to High susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: VH
Enumerated_Domain_Value_Definition: Very High susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: VL
Enumerated_Domain_Value_Definition: Very Low Susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: w
Enumerated_Domain_Value_Definition: water (not susceptible)

Detailed_Description:

Entity_Type:

Entity_Type_Label: NA-GEOL.AAT
Entity_Type_Definition: Linear features on geologic map
Entity_Type_Definition_Source: OFR-98-460

Attribute:

Attribute_Label: LTYPE
Attribute_Definition: Line type
Attribute_Definition_Source: OFR-98-460
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: contact, certain
Enumerated_Domain_Value_Definition: Observed contact

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: map boundary, certain
Enumerated_Domain_Value_Definition: Extent of mapped area

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: water boundary, certain
Enumerated_Domain_Value_Definition: Body of water boundary

Detailed_Description:

Entity_Type:

Entity_Type_Label: NA-GEOL.PAT
Entity_Type_Definition:

Surficial deposits at specific points (same attributes as polygon coverage NA-GEOL.PAT)

Entity_Type_Definition_Source: OFR-98-460

Detailed_Description:

Entity_Type:

Entity_Type_Label: NA-HIST.PAT
Entity_Type_Definition: Historical liquefaction events
Entity_Type_Definition_Source: OFR-98-460

Attribute:

Attribute_Label: PROBABLE_UNIT
Attribute_Definition:

probable geologic unit of the historical liquefaction event (same as geologic units of polygon coverage NA-GEOL.PAT)

Attribute_Definition_Source: OFR-98-460

Attribute:

Attribute_Label: PTTYPE
Attribute_Definition: Type of event
Attribute_Definition_Source: OFR-98-460
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Ground cracks
Enumerated_Domain_Value_Definition: Ground cracks were created during event

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Lateral spreading
Enumerated_Domain_Value_Definition: Deposits spread laterally during event

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ground settlement
Enumerated_Domain_Value_Definition: Ground settled during event

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: sand boil
Enumerated_Domain_Value_Definition: Sand boil was created during event

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Absence of cracks
Enumerated_Domain_Value_Definition: No cracks were created during event

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Miscellaneous effects
Enumerated_Domain_Value_Definition: Not categorized effects of event

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: USGS Open-File Report 98-460
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, Napa, 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:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE
Format_Version_Number: 7.x
Format_Information_Content:

ARC/INFO export file	Description of coverage

na-geol.e00    Depositional contacts, unit labels, and liquefaction susceptibility
na-hist.e00    Historical liquefaction events
na-index.e00   Topographic contours base map (from 1:100,000 scale originals)
na-drain.e00   Drainage base map (from 1:100,000 scale originals)
na-cult.e00    Cultural and map boundary base map

File_Decompression_Technique: gzip and tar
Transfer_Size: 14.8

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/of/1998/of98-460/na_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

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/98-460/metadata.html>