liquefaction

Theme keywords: geoscientificInformation, Quaternary, Liquefaction, Surficial, Deposits, Earthquake, Soil, Geology

Abstract: Approximately 1700 polygons that show the Quaternary deposits and liquefaction susceptibility for Napa County. Liquefaction is a natural phenomenon in which saturated, sandy soils lose their strength and behave as liquid. Liquefaction is a caused by severe ground shaking during earthquake events. This data set identifies the liquefaction potential for soil in Napa County

FGDC and ESRI Metadata:

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: Carl M. Wentworth, Robert S. Nicholson, Heather M. Wright, Katherine M. Brown


Title:
liquefaction


Publication date: 20000101
Edition: Version 1.0
Geospatial data presentation form: vector digital data


Other citation details:
For in depth information see USGS website listed below:


Description:
Abstract:
Approximately 1700 polygons that show the  Quaternary deposits and liquefaction susceptibility for Napa County. Liquefaction is a natural phenomenon in which saturated, sandy soils lose their strength and behave as liquid. Liquefaction is a caused by severe ground shaking during earthquake events. This data set identifies the liquefaction potential for soil in Napa County

Purpose:
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. 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:
The Quaternary deposits database was compiled digitally in vector form in ARC/INFO as individual 7.5-minute (126) and 0.5x1.0-degree (2) quadrangles at scales of 1:24,000 and 1:100,000, respectively. The 1:100,000 materials were modified from previously released spatial databases for the San Francisco and Napa 0.5x1.0-degree quadrangles (Knudsen and others, 1997, and Sowers and others, 1998, respectively), and the 1:24,000 materials were variously modified from previous work or newly digitized, depending on the degree of remapping involved (see part 3, Description of Mapping). These many individual pieces were converted to UTM projection and assembled into a single regional layer. Remaining quadrangle boundary problems were resolved where possible, although some remain where the status of mapping differs across the boundary. The resulting spatial database retains the resolution of the input parts, some at 1:24,000, some at 1:100,000. Much of the fine detail in the spatial database is too small for legible portrayal at the regional scale of the colored maps (1:275,000).

The ground-effects database was compiled digitally in vector form from 1:100,000 and 1:24,000 materials, including relocation at 1:24,000 of 1:250,000-scale map features based on text descriptions of historic effects (see Appendix C of part 3, Description of Mapping). 

The Loma Prieta dataset was digitized directly in ARC/INFO, whereas the historic dataset was digitized in MapInfo and subsequently converted to ARC/INFO. Points and lines for the historic and Loma Prieta datasets were combined into a single vector layer, but the polygons could not be (some polygons overlap), and these remain separate.  

The vector lines in the quadrangle database were generated automatically with high precision in ARC/INFO as a latitude/longitude grid, densified to a vertex spacing of 0.005 degrees along all the lines, and reprojected to UTM .

                              SPATIAL RESOLUTION
The digital database should not be used in ways that violate the spatial resolution of the data.  Although the digital form of the data removes the physical constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. Use of the database at scales larger than 1:100,000 (or where appropriate, 1:24,000) may not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database.  Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of this data.

The fact that the Quaternary deposits and ground effects datasets were assembled from maps of different scale, some at 1:24,00 and some at 1:100,000, means that information of resolution greater than 1:100,000 cannot be ensured in any 
particular part of the database. The resolution of the Quaternary deposits database by 1:24,000 quadrangle is described in part 3 and shown on Figure 3 of part 3 and on the index map of map sheet 1, and is encoded in the quadrangle 
index database in the COMPIL field and directly in the SCALE field. The quality of the original location of contacts is distinguished by line type. The ground effects locations have varying original quality, as described in the database, and were digitized from the published 1:100,000 and 1:24,000 (San Francisco) maps for the Loma Prieta earthquake and from 1:24,000 relocations of earlier historic localities. The quadrangle boundaries in the quadrangle index are 
accurate at 1:24,000.
Meanings of liquefaction susceptibility codes in the LIQ field 
                 (SF-QUAT.PAT)
	     This table lists the contents of the LIQ definition table 
             SF-QUAT.QDEF.

	    LIQ CODE (LIQ)    DEFINITION (QDEF)
		VH       	VERY HIGH
		H		HIGH
		M		MODERATE
		L   		LOW
		VL           	VERY LOW
		W       	WATER
		NM       	AREA NOT MAPPED

This table lists in stratigraphic order the combined contents of the 
          PTYPE definition table (SF-QUAT.UN) and the PTYPE/LIQ correlation 
          table SF-QUAT.LIQ.

	    	PTYPE    	  LIQ    	        NAME

		          MODERN

		af	L	Artificial fill
		afbm	VH	Artificial fill over San Francisco Bay Mud
		alf	H	Artificial levee fill
		ads	VH	Dredge spoils
		gq	H	gravel quarry	
		ac	L	Artificial stream channel
		Qhc	VH	Modern stream channel deposits

		          LATEST HOLOCENE

		Qhfy	VH	Latest Holocene alluvial fan deposits
 		Qhly	VH	Latest Holocene alluvial fan levee deposits
		Qhty	VH	Latest Holocene stream terrace deposits
 		Qhty1	VH	Younger latest Holocene stream terrace deposits
 		Qhty2	VH	Older latest Holocene stream terrace deposits
		Qhay	VH	Latest Holocene alluvial deposits, 
				  undifferentiated
		Qhfp	VH	Late Holocene alluvial floodplain deposits, 
				  undifferentiated
		Qhfb	H	Late Holocene flood basin deposits

		          HOLOCENE

		Qhbs	VH	Holocene beach sand
		Qhds	H	Holocene dune sand
		Qhbm	H	Holocene San Francisco Bay Mud
		Qhdm	H	Holocene San Joaquin/Sacramento Delta mud and 
				  peat
		Qhb	H	Holocene basin deposits
		Qhfe	H	Holocene alluvial fan-estuarine complex deposits
		Qhff	H	Holocene alluvial fan deposits, fine facies	
  		Qhf	M	Holocene alluvial fan deposits
		Qhf1	M	Younger Holocene alluvial fan deposits
 		Qhf2	M	Older Holocene alluvial fan deposits
 		Qhl	M	Holocene alluvial fan levee deposits
		Qhl1	M	Younger Holocene alluvial fan levee deposits
		Qhl2	M	Older Holocene alluvial fan levee deposits
		Qht	H	Holocene stream terrace deposits
 		Qht1	H	Younger Holocene stream terrace deposits
 		Qht2	H	Older Holocene stream terrace deposits
		Qha	H	Holocene alluvium, undifferentiated

		          LATEST PLEISTOCENE TO HOLOCENE

		Qds	M	Latest Pleistocene to Holocene dune sand
 		Qb	L	Latest Pleistocene to Holocene basin deposits
 		Qf	L	Latest Pleistocene to Holocene alluvial fan 
				  deposits
 		Ql	L	Latest Pleistocene to Holocene alluvial fan 
				  levee deposits
 		Qt	M	Latest Pleistocene to Holocene stream terrace 
				  deposits
		Qa	M	Latest Pleistocene to Holocene alluvium, 
				  undifferentiated

		          LATEST PLEISTOCENE

		Qpb	L	Latest Pleistocene basin deposits
 		Qpf	L	Latest Pleistocene alluvial fan deposits
 		Qpt	L	Latest Pleistocene stream terrace deposits
		Qpa	L	Latest Pleistocene alluvium, undifferentiated

		          EARLY TO LATE PLEISTOCENE

		Qmt	L	Pleistocene marine terrace deposits
		Qmt1	L	Youngest (of 4) Pleistocene marine terrace 
				  deposits
		Qmt2 	L	Second youngest (of 4) Pleistocene marine 
				  terrace deposits
		Qmt3 	L	Second oldest (of 4) Pleistocene marine terrace 
				  deposits
		Qmt4 	L	Oldest (of 4) Pleistocene marine terrace 
				  deposits
 		Qop	VL	Early to late Pleistocene pediment deposits
		Qof	VL	Early to late Pleistocene alluvial fan deposits
		Qof1	VL	Younger early to late Pleistocene alluvial fan 
				  deposits
 		Qof2	VL	Older early to late Pleistocene alluvial fan 
				  deposits
		Qot	VL	Early to late Pleistocene stream terrace 
				  deposits
		Qoa	VL	Early to late Pleistocene alluvial deposits, 
				  undifferentiated
 		Qoa1	VL	Younger early to late Pleistocene alluvial 
				  deposits, undifferentiated
 		Qoa2	VL	Older early to late Pleistocene alluvial 
				  deposits, undifferentiated

		          PRE-PLEISTOCENE

		br	VL	bedrock

Time period of content:
Time period information:
Single date/time:
Calendar date: 20000101
Time of day: unknown

Currentness reference:
publication date

Status:
Progress: Complete
Maintenance and update frequency: As needed

Spatial domain:
Bounding coordinates:
West bounding coordinate: -122.648943
East bounding coordinate: -122.061226
North bounding coordinate: 38.864946
South bounding coordinate: 38.153319

Keywords:
Theme:
Theme keywords: geoscientificInformation
Theme keyword thesaurus: ISO 19115 Topic Category

Theme:
Theme keywords: Quaternary, Liquefaction, Surficial, Deposits, Earthquake, Soil, Geology
Theme keyword thesaurus: none

Place:
Place keywords: Napa, Napa County, California
Place keyword thesaurus: Geographic Names Information System

Access constraints: Access to this data is limited to County of Napa, partner agencies, government agencies or non-profits. Please contact County GIS staff for more information.
Use constraints:
Disclaimer: This GIS data is intended to provide a visual display of data for the user's convenience. Users of this data are hereby notified that the appropriate public primary information sources should be consulted for verification of the information.  Although every reasonable effort has been made to assure the accuracy of this data, the County of Napa makes no warranty, representation or guaranty as to the content, sequence, accuracy, timeliness or completeness of any of the data provided herein and explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. The County of Napa assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused and assumes no liability for any decisions made or actions taken or not taken by the user of the data in reliance upon any information or data furnished hereunder. Because the GIS data provided is not warranted to be up-to-date, the user should check with the County staff for updated information.

Point of contact:
Contact information:
Contact organization primary:
Contact person: Patrick Lowe
Contact organization: County of Napa: Conservation, Development & Planning
Contact position: Deputy Planning Director


Contact address:
Address type: physical address
Address:
1195 Third St Room 210
City: Napa
State or province: CA
Postal code: 94559
Country: United States

Contact voice telephone: (707) 253-4417
Contact facsimile telephone: (707) 253-4336


Contact electronic mail address: rlowe@co.napa.ca.us


Data set credit:
geology by Keith L. Knudsen(1,2), Janet M. Sowers(1), Robert C. Witter(1), Carl M. Wentworth(3) and Edward J. Helley(1) digital database by Carl M. Wentworth(3), Robert S. Nicholson(3), Heather M. Wright(3), and Katherine M. Brown(3)

Security information:
Security classification: Unclassified

Native data set environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000


Cross reference:
Citation information:
Originators: Keith L. Knudsen, Janet M. Sowers, Robert C. Witter, Carl M. Wentworth, Edward J. Helley, Robert S. Nicholson, Heather M. Wright, Katherine M. Brown


Title:
liquefaction and surficial deposits


Publication date: 2000
Publication time: Unknown
Edition: ver 1.0
Geospatial data presentation form: vector digital data


Online linkage: http://geopubs.wr.usgs.gov/open-file/of00-444/


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Data Quality Information:


Logical consistency report:
database has been subjected to rigorous review by the USGS and is substantially complete, the 
USGS reserves the right to revise the data pursuant to further analysis and review.

Completeness report:
complete

Lineage:
Source information:
Source citation:
Citation information:
Originators: Napa County Conservation, Development & Planning


Title:
planning


Publication date: Unknown


Source scale denominator: 24,000
Type of source media: online
Source citation abbreviation:
USGS
Source contribution:
All data in this layer was contributed by U.S. Department of the interior U.S. Geological Survey

Source time period of content:
Time period information:
Single date/time:
Calendar date: 1998

Source currentness reference:
publication date

Process step:
Process description:
Data loaded to ArcSDE.

Process date: 20040127


Process step:
Process description:
Dataset copied.

Process date: 20040127


Source used citation abbreviation:


Process step:
Process description:
Dataset copied.

Process date: 20110114
Process time: 10521300


Source used citation abbreviation:
server=gisdata_test; service=sde:sqlserver:gisdata_test; database=planning; user=gis; version=sde.default


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Spatial Data Organization Information:


Direct spatial Rreference method: Vector


Point and vector object information:
ESRI terms description:
*Name: liquefaction
*ESRI feature type: Simple
*ESRI feature geometry:
*ESRI topology: FALSE
*ESRI feature count: 1746
*Spatial index: TRUE
*Linear referencing: FALSE


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Spatial Reference Information:


Horizontal coordinate system definition:
Planar:
Planar coordinate information:
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000625
Ordinate resolution: 0.000625
Planar distance units: survey feet

Geodetic model:
Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222

Vertical coordinate system definition:
Altitude system definition:
Altitude resolution: 1.000000
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

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Entity and Attribute Information:


Detailed description:
*Name: liquefaction


Entity type:
Entity type label: liquefaction
*Entity type type: Feature Class
*Entity type count: 1746
Entity type definition:
Liquefaction
Entity type definition source:
Dataset developer

Attribute:
Attribute label: OBJECTID
*Attribute alias: OBJECTID
Attribute definition:
Internal feature number.
Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
Attribute label: PTYPE
*Attribute alias: PTYPE
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: String
*Attribute width: 35
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: LIQ
*Attribute alias: LIQ
Attribute definition:
Area of feature in internal units
Attribute definition source:
ESRI

*Attribute type: String
*Attribute width: 8
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: LIQ_SOURCE
*Attribute alias: LIQ_SOURCE
Attribute definition:
length of Feature
Attribute definition source:
ESRI

*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute:
Attribute label: Shape
*Attribute alias: Shape
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: Shape.STLength()
*Attribute alias: Shape.STArea()
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: SHAPE
*Attribute alias: Shape.STLength()
Attribute definition:
For the Quaternary symbolization & definitions
Attribute definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Enumerated domain:
Enumerated domain value: af
Enumerated domain value definition:
Artificial Fill - Liquefaction L (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: afbm
Enumerated domain value definition:
Artificial fill over SF Bay Mud - Liquefaction VH (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: alf
Enumerated domain value definition:
Artificial levee fill - Liquefaction H (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: ads
Enumerated domain value definition:
Dredge spoils - Liquefaction VH (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: gq
Enumerated domain value definition:
gravel quarry - Liquefaction H (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: ac
Enumerated domain value definition:
Artificial stream channel - Liquefaction L (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhc
Enumerated domain value definition:
Modern stream channel deposits - Liquefaction VH (Modern)
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhgy
Enumerated domain value definition:
Latest Holocene alluvial fan deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhly
Enumerated domain value definition:
Latest Holocene alluvial fan levee deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhty
Enumerated domain value definition:
Latest Holocene stream terrace deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhty1
Enumerated domain value definition:
Younger latest Holocene stream terrace deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhty2
Enumerated domain value definition:
Older latest Holocene stream terrace deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhay
Enumerated domain value definition:
Latest Holocene alluvial deposits, undifferentiated - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhfp
Enumerated domain value definition:
Late Holocene alluvial floodplain deposits, undifferentiated - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhfb
Enumerated domain value definition:
Late Holocene flood basin deposits - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhbs
Enumerated domain value definition:
Holocene beach sand - Liquefaction VH
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhds
Enumerated domain value definition:
Holocene dune sand - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhbm
Enumerated domain value definition:
Holocene SF Bay Mud - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhdm
Enumerated domain value definition:
Holocene San Joaquin/Sacramento Delta mud and peat - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhb
Enumerated domain value definition:
Holocene basin deposits - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhfe
Enumerated domain value definition:
Holocene alluvial fan-estuarine complex deposits - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhff
Enumerated domain value definition:
Holocene alluvial fan deposits, fine facies - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhf
Enumerated domain value definition:
Holocene alluvial fan deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhf1
Enumerated domain value definition:
Younger Holocene alluvial fan deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhf2
Enumerated domain value definition:
Older Holocene alluvial fan deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhl
Enumerated domain value definition:
Holocene alluvial fan levee deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhl1
Enumerated domain value definition:
Younger Holocene alluvial fan levee deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qhl2
Enumerated domain value definition:
Older Holocene alluvial fan levee deposits- Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qht
Enumerated domain value definition:
Holocene stream terrace deposit - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qht1
Enumerated domain value definition:
Younger Holocene stream terrace deposits - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qht2
Enumerated domain value definition:
Older Holocene stream terrace deposits - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qha
Enumerated domain value definition:
Holocene alluvium, undifferentiated - Liquefaction H
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qds
Enumerated domain value definition:
Latest Pleistocene to Holocene dune sand - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qb
Enumerated domain value definition:
Latest Pleistocene to Holocene basin deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qf
Enumerated domain value definition:
Latest Pleistocene to Holocene alluvial fan deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Ql
Enumerated domain value definition:
Latest Pleistocene to Holocene alluvial fan levee deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qt
Enumerated domain value definition:
Latest Pleistocene to Holocene stream terrace deposits - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qa
Enumerated domain value definition:
Latest Pleistocene to Holocene alluvium, undifferentiated - Liquefaction M
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qpb
Enumerated domain value definition:
Latest Pleistocene basin deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qpf
Enumerated domain value definition:
Latest Pleistocene alluvial fan deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qpt
Enumerated domain value definition:
Latest Pleistocene stream terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qpa
Enumerated domain value definition:
Latest Pleistocene alluvium, undifferentiated - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qmt
Enumerated domain value definition:
Pleistocene marine terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qmt1
Enumerated domain value definition:
Youngest (of 4) Pleistocene marine terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qmt2
Enumerated domain value definition:
Second youngest (of 4) Pleistocene marine terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qmt3
Enumerated domain value definition:
Second oldest (of 4) Pleistocene marine terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qmt4
Enumerated domain value definition:
Oldest (of 4) Pleistocene marine terrace deposits - Liquefaction L
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qop
Enumerated domain value definition:
Early to late Pleistocene pediment deposits - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qof
Enumerated domain value definition:
Early to late Pleistocene alluvial fan deposits - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qof1
Enumerated domain value definition:
Younger early to late Pleistocene alluvial fan deposits - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qof2
Enumerated domain value definition:
Older early to late Pleistocene alluvial fan deposits - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qot
Enumerated domain value definition:
Early to late Pleistocene stream terrace deposits - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qoa
Enumerated domain value definition:
Early to late Pleistocene alluvial deposits, undifferentiated - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qoa1
Enumerated domain value definition:
Younger early to late Pleistocene alluvial deposits, undifferentiated - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: Qoa2
Enumerated domain value definition:
Older early to late Pleistocene alluvial deposits, undifferentiated - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Enumerated domain:
Enumerated domain value: br
Enumerated domain value definition:
Bedrock - Liquefaction VL
Enumerated domain value definition source:
http://geopubs.wr.usgs.gov/open-file/of00-444/

Unrepresentable domain:
Coordinates defining the features.


Overview description:
Entity and attribute detail citation:
U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact organization: County of Napa ITS Department
Contact position: GIS Coordinator


Contact address:
Address type: mailing and physical address
Address:
650 Imperial Way #201
City: Napa
State or province: CA
Postal code: 94559
Country: USA

Contact voice telephone: (707) 259-8141
Contact facsimile telephone: (707) 253-4824


Contact electronic mail address: gisstaff@co.napa.ca.us


Hours of service: M-F 8:00 am - 5:00 pm



Resource description: downloadable data


Distribution liability:
Disclaimer: This GIS data is intended to provide a visual display of data for the user's convenience. Users of this data are hereby notified that the appropriate public primary information sources should be consulted for verification of the information.  Although every reasonable effort has been made to assure the accuracy of this data, the County of Napa makes no warranty, representation or guaranty as to the content, sequence, accuracy, timeliness or completeness of any of the data provided herein and explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. The County of Napa assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused and assumes no liability for any decisions made or actions taken or not taken by the user of the data in reliance upon any information or data furnished hereunder. Because the GIS data provided is not warranted to be up-to-date, the user should check with the County staff for updated information.

Standard order process:
Fees: none for digital form
Ordering instructions:
All available layers are located in the Data Catalog on the website http://gis.napa.ca.gov/gisdata.asp.
You can download the available layers by Registering, then returning to the site to download.


Custom order process:
Go to website http://gis.napa.ca.gov/gisdata.asp to request CD by mail for an additional fee.


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Metadata Reference Information:


Metadata date: 20110322
Metadata review date: 20040728


Metadata contact:
Contact information:
Contact organization primary:
Contact organization: County of Napa ITS Department
Contact position: GIS Coordinator


Contact address:
Address type: mailing and physical address
Address:
650 Imperial Way #201
City: Napa
State or province: CA
Postal code: 94559
Country: USA

Contact voice telephone: (707) 259-8141
Contact facsimile telephone: (707) 253-4824


Contact electronic mail address: gisstaff@co.napa.ca.us


Hours of service: M-F 8:00 am - 5:00 pm



Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata
Metadata standard version: FGDC-STD-001-1998
Metadata time convention: local time


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Metadata stylesheets are provided courtesy of ESRI. Copyright (c) 2000-2002, Environmental Systems Research Institute, Inc. All rights reserved.