GEOLEX database Geologic Unit: Tecovas Usage: Tecovas Formation of Dockum Group (NM?,TX*) Tecovas Member of Dockum Formation (TX) [Discrepancy concerning the areal extent. See remarks under "Publication History".] Age: Triassic, Late* Carnian, late Geologic Province: Anadarko basin* Palo Duro basin* Permian basin Areal Extent: NM? TX(n)* Type Locality: Not designated. Named from exposures on Tecovas Creek, Potter Co., panhandle of TX (Gould, 1907). [From US geologic names lexicons, USGS Bull. 896, 1200] Unit Name History: Name proposed for the lower formation (of 2) of Dockum Group (Gould, 1907). Areal limits; Mapped 1:250k in Quay Co., NM, and Oldham, Hartley, Potter, and Moore Cos., TX (Barnes, 1983). Biostratigraphic dating, based on ostracodes (Kietzke and Lucas 1991). [Discrepancy in GNU records (USGS DDS-6) concerning the areal extent of this unit. Denver GNULEX indicates this unit extends into NM as the Tecovas Formation of the Dockum Group (see Barnes, 1983). The GNU comprehensive file GEONAMES does not. Uncertain if Tecovas Formation of Dockum Group is used by the New Mexico Geol. Survey. --unresolved.] Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov). Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys. "No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses (). Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]). U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html Database project personnel Last modified: 7-Jan-2007