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Upper Dockum Group strata, as defined by McGowen et al. (1977) and in common usage by TWDB contractors. Dominantly sandstones and mudstones, generally fining upwards.
Included geologic units: Cooper Canyon and Trujillo Formations of the upper portion of the Dockum Group. Cf., McGowen et al. (1977), Ewing et al. (2008), and Deeds et al. (2015). Primary input data: Well data from the BRACS database and Broadhead and Ulmer-Scholle (2012); structure contours from Blandford et al. (2008). |