Filters: Tags: 3111 - coverage (X)26 results (37ms)
Geologic Map and Digital Database of the Cougar Buttes 7.5'Quadrangle, San Bernardino County, California
This data set maps and describes the geology of the Cougar Buttes 7.5'quadrangle, San Bernardino County, California. Created usingEnvironmental Systems Research Institute's ARC/INFO software, the database consists of the following items: (1) a map coverage showinggeologic contacts and units, (2) a separate coverage layer showingstructural data, (3) a scanned topographic base at a scale of 1:24,000,and (4) attribute tables for geologic units (polygons), contacts (arcs),and site-specific data (points). The data base is accompanied by areadme file and this metadata file. In addition, the data set includesthe following graphic and text products: (1) A portable document file(.pdf) containing a browse-graphic of the geologic...
Preliminary geologic map of the Mesquite quadrangle, Clark and Lincoln Counties, Nevada and Mohave County, Arizona
Original geologic data mapped by the author in 1995 and 1996with emphasis on structures in Miocene basin-fill deposits ofthe Muddy Creek Formation that may control availability andquality of groundwater.
Preliminary geologic map of the San Guillermo Mountain quadrangle, Ventura County, California, version 1.0
New 1:24,000-scale geologic mapping in the Cuyama 30' x 60' quadrangle, in support of the USGS Southern California Areal Mapping Project (SCAMP), is contributing to a more complete understanding of the stratigraphy, structure, and tectonic evolution of the complex junction area between the NW-striking Coast Ranges and EW-striking western Transverse Ranges. The 1:24,000-scale geologic map of the San Guillermo Mountain quadrangle is one of six contiguous 7 1/2' quadrangle geologic maps in the eastern part of the Cuyama map area being compiled for a more detailed portrayal and reevaluation of geologic structures and rock units shown on previous geologic maps of the area (e.g., Dibblee, 1979). The following observations...
Geologic map of the Hayward fault zone, Contra Costa, Alameda, and Santa Clara Counties, California: A digital database
This digital map database, compiled from previously open- filed U.S.Geological Survey reports (Graymer and others, 1994, Graymer,Jones, and Brabb, 1994) and unpublished data, represents thegeneral distribution of rocks and faults in the Hayward fault zone.As described in this report, the Hayward fault zone is a zone ofhighly deformed rocks which trends north 30 degrees west from anarea southeast of San Jose to the San Pablo Bay, and ranges inwidth from 2 to 10 kilometers. Although historic earthquakeactivity has been concentrated in the western part of the zone, thezone as a whole reflects oblique right-lateral and compressivedeformation along a significant upper crustal break over the past10 million years or more....
Preliminary geologic map emphasizing bedrock formations in Contra Costa County, California: A digital database
This digital map database, which is compiled from previouslypublished and unpublished sources combined with new mapping,represents the general distribution and identity of bedrock in ContraCosta County, California.
This is an ARC/INFO coverage of surface and Federal mineral ownership in the Powder River Basin area, Montana and Wyoming. This coverage is the combination of several ARC/INFO coverages and MOSS format files that were collected from the BLM, reformatted as needed, modified, and/or created by the USGS from hard copy BLM 1:100,000- scale surface and mineral management status maps. The Powder River Basin has the largest in-place coal resources of any field in the contiguous U.S. (Keystone, 1997), and produces over one- fourth of the Nation's total coal production (The Mining Record, 1997). In the Powder River Basin, very little of the surface is Federal land, yet almost all of the coal is Federally owned.