Name: Elevation of the Base of the Hennessey Formation (ft)

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Description: The structure-contour map of the altitude of the base of the Hennessey Group was created from the correlation of geologic logs across the study area and was originally published in Christenson and others (1992). The Permian-age Hennessey Group overlies the western part of the Central Oklahoma aquifer and consists of interbedded red shale, clay, and some siltstone or fine-grained sandstone. The Hennessey Group is composed of the Bison Formation, Salt Plain Formation, Kingman Formation, and the Fairmont Shale. Although not considered part of the Central Oklahoma aquifer, the Hennessey Group outcrops in the western one-third of teh aquifer area and acts as a confining layer. Total Thickness of the Hennessey Group ranges from 600 to 650 feet.

Definition Expression: N/A

Copyright Text: Modified by the OWRB from the 2013 USGS publication Hydrogeology and simulation of groundwater flow in the Central Oklahoma (Garber-Wellington) aquifer, Oklahoma, 1987 to 2009, and simulation of available water in storage, 2010-2059. Scientific Investigation Report 2013 - 5219. Authors: Shana L. Mashburn, Derek Ryter, Christopher R. Neel, S. Jerrod Smith, and Jessica S. Magers

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XMin: -150423.78490000032
YMin: 1322643.1101000002
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YMax: 1422753.6999999993
Spatial Reference: 102039  (102039)

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