Digital water-level elevation contours for the alluvial and terrace deposits along the Cimarron River from Freedom to Guthrie in northwestern Oklahoma

This data set was created for a project to develop data sets to support
ground-water vulnerability analysis. The objective was to create and document a
digital geospatial data set from a published report or map, or existing digital
geospatial data set that could be used in ground-water vulnerability analysis.

This data set consists of digital water-level elevation contours for the
alluvial and terrace deposits along the Cimarron River in northwestern Oklahoma
during 1985-86. Ground water in 1,305 square miles of Quaternary-age alluvial
and terrace deposits along the the Cimarron River from Freedom to Guthrie is an
important source of water for irrigation, industrial, municipal, stock, and
domestic supplies. Alluvial and terrace deposits are composed of interfingering
lenses of clay, sandy clay, and cross-bedded poorly sorted sand and gravel. The
aquifer is composed of hydraulically connected alluvial and terrace deposits
that unconformably overlie the Permian-age Formations.

Water-level elevations measured in 1985 and 1986 ranged from 1,650 feet to 950
feet above sea level. Regional ground-water flow is generally southeast to
southwest towards the Cimarron River, except where the flow direction is
affected by perennial tributaries. The water-level elevation contours were
digitized from a mylar map at a scale of 1:250,000. The maps were published at
a scale of 1:900,000.