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Open-File Report 2010-1123

Prepared in cooperation with Oklahoma State University and the Oklahoma Water Resources Board

Three-Dimensional Geologic Model of the Arbuckle-Simpson Aquifer, South-Central Oklahoma

By Jason R. Faith,1 Charles D. Blome,2 Michael P. Pantea,2 James O. Puckette,3 Todd Halihan,3 Noel Osborn,4 Scott Christenson,5 and Skip Pack6

1 Oklahoma State University, Stillwater, OK
2 U.S. Geological Survey, Denver, CO
3 School of Geology, Oklahoma State University, Stillwater, OK
4 Oklahoma Water Resources Board, Oklahoma City, OK
5 U.S. Geological Survey, Albuquerque, NM
6 Dynamic Graphics, Inc., Alameda, CA

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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™ 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™ 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.

First posted July 16, 2010

For additional information contact:

USGS Geology and Environmental Change Science Center
Box 25046, Mail Stop 980
Denver, CO 80225

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Suggested citation:

Faith, J.R., Blome, C.D., Pantea, M.P., Puckette, J.D., Halihan, Todd, Osborn, Noel, Christenson, Scott, Pack, Skip, 2010, Three-dimensional geologic model of the Arbuckle–Simpson aquifer, south-central Oklahoma: U.S. Geological Survey Open-File Report 2010–1123, 29 p.



Contents

Abstract

Introduction

Purpose and Scope

Geologic Setting

Three-Dimensional Modeling

Significance of Three-Dimensional Geologic Modeling for Groundwater Modeling

References Cited


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