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WWRC 94-26
Karstic Groundwater Circulation in the Fault-Severed Madison Aquifer in the Casper Mountain Area of Natrona County, Wyoming

Abstract

Aquifer-severing displacements along thrust faults adjacent to local structural highs of the Casper Formation have disrupted the hydraulic continuity of the Madison aquifer in the Casper Mountain area and segmented the aquifer into five discrete groundwater compartments. The large permeability of the Madison aquifer in the Casper Mountain groundwater compartment is attributed to the dissolution of interstitial cements and matrix materials within the aquifer that has resulted in the development of a madison karst. Consequently, the storage capacity of the Madison aquifer is sufficient to damp out recharge pulses. The implication for groundwater prospecting is that large quantities of groundwater can be withdrawn from storage in the Madison aquifer throughout the entire southwestern homoclinal flank of Casper Mountain.

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