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General: Lower Dockum Group strata, as defined by McGowen et al. (1977) and in common usage by TWDB contractors. Dominantly sandstones and mudstones, generally fining upwards. Lower Dockum NW: Lower Dockum Group strata occuring around the Sierra Blanca basin. Separated from the remaining Dockum by a preservation gap, and modeled separately. Combined with the remaining Lower Dockum in final model.
Included geologic units:
- Lower Dockum: Tecovas and Santa Rosa Formations of the lower portion of the Dockum Group. Cf. McGowen et al. (1977), Ewing et al. (2008), and Deeds et al. (2015). - Lower Dockum NW: Principally Santa Rosa Formation.
Primary input data: - Lower Dockum: Well data from the BRACS database, Broadhead and Ulmer-Scholle (2012), and NM OCD (2018); structure contours from Ewing et al. (2012); geologic map from NMBGMR (2003).
- Lower Dockum NW: Cross-sections by NMBGMR geologists and affiliates; geologic map from NMBGMR (2003). |