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Abstract
Paleodepositional Facies, Lower Cretaceous Cow Creek Member, Texas Hill Country
ABSTRACT
This study addresses the fresh water aquifer characteristics of the Cow Creek Member of the Pearsall Formation within the Texas Hill Country focusing on the paleodepositional elements of the unit. The varied facies of the Cow Creek Member are described and mapped based upon the examination of samples from recently drilled water wells across the study area. This study represents the first of several ongoing mapping programs to define the various aquifer units within the Cretaceous System across the Texas Hill Country. Paleodepositional environments have been found to be closely associated with the aquifer characteristics and well yields. The underlying, deeply buried, structural elements are believed to have controlled the subtle facies changes found in the Cow Creek Member and subsequently controlled the water yields found today.
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