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Three-dimensional geologic model of the Arbuckle-Simpson aquifer, south-central Oklahoma

July 17, 2010

The Arbuckle-Simpson aquifer of south-central Oklahoma encompasses more than 850 square kilometers and is the principal water resource for south-central Oklahoma. Rock units comprising the aquifer are characterized by limestone, dolomite, and sandstones assigned to two lower Paleozoic units: the Arbuckle and Simpson Groups. Also considered to be part of the aquifer is the underlying Cambrian-age Timbered Hills Group that contains limestone and sandstone. The highly faulted and fractured nature of the Arbuckle-Simpson units and the variable thickness (600 to 2,750 meters) increases the complexity in determining the subsurface geologic framework of this aquifer.

A three-dimensional EarthVision (Trademark) geologic framework model was constructed to quantify the geometric relationships of the rock units of the Arbuckle-Simpson aquifer in the Hunton anticline area. This 3-D EarthVision (Trademark) geologic framework model incorporates 54 faults and four modeled units: basement, Arbuckle-Timbered Hills Group, Simpson Group, and post-Simpson. Primary data used to define the model's 54 faults and four modeled surfaces were obtained from geophysical logs, cores, and cuttings from 126 water and petroleum wells. The 3-D framework model both depicts the volumetric extent of the aquifer and provides the stratigraphic layer thickness and elevation data used to construct a MODFLOW version 2000 regional groundwater-flow model.

Publication Year 2010
Title Three-dimensional geologic model of the Arbuckle-Simpson aquifer, south-central Oklahoma
DOI 10.3133/ofr20101123
Authors Jason R. Faith, Charles D. Blome, Michael P. Pantea, James O. Puckette, Todd Halihan, Noel Osborn, Scott Christenson, Skip Pack
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2010-1123
Index ID ofr20101123
Record Source USGS Publications Warehouse
USGS Organization Environmental Change Science Center