USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
Workman, Jeremiah B. , Menges, Christopher M. , Page, William R. , Ekren, E. B. , Rowley, Peter D. , and Dixon, Gary L. , 2002, Tectonic Map of the Death Valley Ground-Water Model Area, Nevada and California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2381-B, U. S. Geological Survey, Denver, Colorado.Online Links:
This is a vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 65
Ordinates (y-coordinates) are specified to the nearest 65
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
The individual attributes for each coverage are described as follows (*=DVRFS): --------POLYGONS-<*_GEO> UNIT: see map text for explanation of lithologic unit symbols &=Pennsylvanian @=Triassic _=Cambrian UNIT_CODE: 1=surficial Quaternary unit 2=igneous Quaternary unit 3=sedimentary Tertiary unit 4=volcanic Tertiary unit 5=intrusive Tertiary unit 6=sedimentary Mesozoic unit 7=igneous Mesozoic unit 8=sedimentary Paleozoic unit 9=igneous Paleozoic unit 10=Precambrian unit TECT_CODE: 0=no tectonic significance assigned 1=Mesozoic intrusive rocks 2=Tertiary intrusive rocks 3=Proterozoic basement rocks (base of ground-water model) SYMBOL: value from CTR269 shadeset for coloring polygons --------ARCS-<*_GEO, *_FLT, *_GPFLT, *_CALD, *_LIN, *_TLINE, *_WLANE> TECT_INDEX (*_FLT only): 0=not regionally significant structure 1=regionally significant structure LABEL (*_CALD, *_LIN, *_TLINE, and *_WLANE only): character attribute describing structure LINE_CODE, DESCRIPTION (*_GEO, *_FLT, *_GPFLT and *_CALD only): 1, "contact-certain" 2, "contact-inferred" 10, "contact-faulted" + 20, "fault-certain" 21, "fault-inferred" 22, "fault-concealed" 23, "fault-queried" 30, "thrust fault-certain" 31, "thrust fault-inferred" 32, "thrust fault-concealed" 40, "low-angle normal fault-certain" 41, "low-angle normal fault-inferred" 42, "low-angle normal fault-concealed" 60, "caldera boundary-certain" 62, "caldera boundary-concealed" 90, "geophysically inferred structure-well constrained" 91, "geophysically inferred structure-poorly constrained" 99, "map area boundary" + code=10 is used for lines which represent both fault lines and unit contacts in DVRFS_GEO. It is a cartographic designation for lines repeated in both the geology and fault coverages so that they will not be drawn twice in plotting and is not used uniformly due to inconsistent attribution of source data. SYMBOL: value from GEOSCAMP1 lineset for drawing lines --------ARC-<*_SYM> SYMBOL: 1= bar and ball symbol 2= bar and ball symbol (geophysically inferred structure) 3= right-lateral offset arrows 4= right-lateral offset arrows (geophysically inferred structure) 5= left-lateral offset arrows 6= left-lateral offset arrows (geophysically inferred structure) --------POINT-<*_SYM> SYMBOL: 1= bar and ball symbol 2= bar and ball symbol (geophysically inferred structure) 3= right-lateral offset arrows 4= right-lateral offset arrows (geophysically inferred structure) 5= left-lateral offset arrows 6= left-lateral offset arrows (geophysically inferred structure) ANGLE: angle to plot offset symbol
303-236-1257 (voice)
jworkman@usgs.gov
This map compilation was completed in support of the Death Valley Ground-Water Basin regional flow model funded by the Department of Energy in conjunction with the U. S. Geological Survey and National Park Service. The proposed model is intended to address issues concerning the availability of water in Death Valley National Park and surrounding counties of Nevada and California and the migration of contaminants off of the Nevada Test Site and Yucca Mountain high-level waste repository. The geologic compilation and tectonic interpretations contained within this database will serve as the basic framework for the flow model. The database also represents a synthesis of many sources of data compiled over many years in this geologically and tectonically significant area.
The database was compiled largely from pre-existing digital data and combined in ARC/INFO. Frequency tests were run on the arc and polygon labels to ensure that no features are unlabeled. The attributes have been checked by both the authors and the reviewers for agreement with published maps, unpublished field mapping, annotated airphotos, annotated LANSAT images, and preliminary drafted versions of the map. The attribute data in the data set should be taken as an accurate representation of the authors' geologic interpretations.
The estimated horizontal positional accuracy of the data is 65 meters. All data used from published and unpublished digital sources is limited by the accuracy of that data. Attempts were made to verify the accuracy of this data by comparison to published topographic data and overlap with other digital data. All new linework and point data were digitized at 1:100,000 and 1:250,000 scale using a CalComp digitizing tablet (model 34360) with an accuracy of 0.005 inches (~12 meters at 1:100,000 scale and ~30 meters at 1:250,000 scale) or by on screen digitizing from georeferenced digital imagery at an approximate 1:100,000 scale. This database was produced to be used at 1:250,000 scale and any problems arising from use at other scales are not the responsibilities of the authors. No vertical data are included in the database (basemap elevations are reproductions of published USGS topographic maps).
This dataset includes only the coverages pertaining to the geologic map. Any margin material on the printed map (correlation chart, explanation of map symbols) is not included. This map was produced to be used at 1:250,000 scale. Any geologic features too small to be shown at this scale have been omitted or generalized if they are of significant importance. The smallest objects are approximately 100 meters on a side. A topographic base map compiled from the published USGS DLG and DEM data is included.
The database was compiled from data mapped previously at various scales from 1:24,000 scale to 1:250,000 scale. The data was generalized to fit a consistent set of criteria. All lines were visually inspected by the authors for proper intersections, repetition, overshoots, undershoots, and overall logical consistency. The geologic features in the map area are all described, in the view of the authors, at a consistent scale of 1:250,000. All coverages were cleaned and built in ARC/INFO (version 8.2) to ensure a logical consistency which is topologically clean.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None
303-236-5486 (voice)
Although this digital spatial data has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government may be held liable for any damage resulting from its authorized or unauthorized use.
Data format: | Geologic units and structural features in format ESRI shapefile (version 1.0) Size: 82 megabytes |
---|---|
Network links: |
<http://pubs.usgs.gov/mf/2002/mf-2381/mf-2381-b/mf-2381_nobase.tar.gz> <http://pubs.usgs.gov/mf/2002/mf-2381/mf-2381-b/mf-2381nobase.zip> |
Data format: | Geologic units and structural features in format ArcInfo export (version 8.1) Size: 82 megabytes |
---|---|
Network links: |
<http://pubs.usgs.gov/mf/2002/mf-2381/mf-2381-b/mf-2381_nobase.tar.gz> <http://pubs.usgs.gov/mf/2002/mf-2381/mf-2381-b/mf-2381nobase.zip> |
1-888-ASK-USGS (voice)
MF-2381-B (Map-on-Demand)
None
Available as one printed sheet with one separate pamphlet. Order from USGS at the address listed above or see <http://rmmcweb.cr.usgs.gov/public/mod/order.html> for more ordering information.
for current prices please see <http://rmmcweb.cr.usgs.gov/public/mod/order.html>
303-236-1257 (voice)
jworkman@usgs.gov