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Boundary of the southwestern Nevada volcanic field from Laczniak and others (1996), for the Death Valley regional ground-water flow system study, Nevada and California

Dates

Publication Date
Time Period
2006
File Modification Date
2017-05-26 16:44:48

Citation

Laczniak, Randell J., 2006, Boundary of the southwestern Nevada volcanic field from Laczniak and others (1996), for the Death Valley regional ground-water flow system study, Nevada and California: U.S. Geological Survey.

Summary

This digital data set defines the boundary of the southwestern Nevada volcanic field (SWNVF), an area of thick, regionally distributed volcanic rocks within the Death Valley regional ground-water flow system (DVRFS), a 100,000-square-kilometer region of southern Nevada and California. The SWNVF boundary encompasses an approximate 12,000 square-kilometer region and is based on a map of hydrogeologic controls on ground-water flow by Laczniak and others (1996). The SWNVF is characterized in part by a thick section of regionally distributed welded tuffs derived from a central complex of nested calderas that erupted from about 16 Ma to 5 Ma. The SWNVF boundary defines the extent of these particular volcanics and was used to distinguish [...]

Contacts

Point of Contact :
U.S. Geological Survey
Originator :
Laczniak, Randell J.
Metadata Contact :
U.S. Geological Survey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey

Attached Files

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pp1711_swnvf.xml
Original FGDC Metadata

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20.42 KB

Purpose

The extent of the SWNVF (Laczniak and others, 1996) was used to distinguish the volcanic tuffs in the DVRFS. Based on geologic studies, it is thought that the volcanic rocks within the SWNVF, particularly those within a caldera boundary, may have different properties than those outside the SWNVF. As a result, the material-property zones for a number of the volcanic rocks were partially based on the extent of the SWNVF. These material-property zones were used to develop input zone-array files for the numerical ground-water flow model of the DVRFS.

Additional Information

Identifiers

Type Scheme Key
processingUrl https://water.usgs.gov/GIS/metadata/usgswrd/XML/pp1711_swnvf.xml

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