Geologic Map and Digital Database of Part of the Uinkaret Volcanic Field, Mohave County, Northwestern Arizona

The geologic map of the Uinkaret volcanic field area covers part of the
Colorado Plateau and several large tributary canyons that make up the western
part of Arizona's Grand Canyon. The map is part of a cooperative U.S.
Geological Survey and National Park Service project to provide geologic
information for areas within the newly established Grand Canyon/Parashant
Canyon National Monument. Most of the Grand Canyon and parts of the adjacent
plateaus have been geologically mapped; this map fills in one of the remaining
areas where uniform quality geologic mapping was needed. The geologic
information presented may be useful in future related studies as to land use
management, range management, and flood control programs for federal and state
agencies, and private concerns.

This digital map database is compiled from unpublished data and new mapping by
the authors, represents the general distribution of surficial and bedrock
geology in the mapped area. Together with the accompanying pamphlet, it
provides current information on the geologic structure and stratigraphy of the
area. The database dilineate map units that are identified by age and
lithology following the stratigraphic nomenclature of the U.S. Geological
Survey. The scale of the source maps limits the spatial resolution of the
database to 1:31,680 or smaller.

This report consists of a set of geologic map database files (ARC/ INFO
coverages) and supporting text and plot files. In addition, the report
includes two sets of plot files (Post Script and PDF format) that will generate
map sheets and pamphlets similar to a traditional USGS Miscellaneous Field
Studies Report. These files are described in the explanatory pamphlets
(uink.eps, uink.pdf, or uink.txt). The base layer used in the preparation of
the geologic map plot files was derived from four Digital Raster Graphic
versions of standard USGS 7.5' quadrangles. These raster images where
converted to Grid format in ARC/INFO, trimmed and seamed together, then
converted to a GeoTIFF image. The resultant TIFF image was combined with
geologic data to produce the final map image in Illustrator 9.0.