GEOLEX database Geologic Unit: Trujillo Usage: Trujillo Formation of Dockum Group (NM,TX*) Trujillo Member of Dockum Formation (TX-recognized locally in Garza and Crosby Cos.) [?] Trujillo Sandstone of Dockum Group (NM,TX) [Discrepancy concerning usage. See remarks under "Publication History".] Age: Triassic, Late* Carnian* Geologic Province: Anadarko basin* Palo Duro basin* Permian basin Las Vegas-Raton basin Areal Extent: NM(ec) TX(n)* Type Locality: Not designated. Named from a creek in Oldham Co., TX (Gould, 1907). Unit Name History: Name proposed for the upper formation (of 2) of Dockum Group (Gould, 1907). Mapped 1:250k in Quay Co., NM and Oldham, Hartley, Potter, and Moore Cos., TX (Barnes, 1983). Revised to member of Dockum Formation (Chatterjee, 1986). Revised, rests on newly named Garita Creek Formation; Areal limits (Lucas and Hunt, 1989). Areal limits (Lucas and others, 1990). [Discrepancy in GNU records (USGS DDS-6) concerning the usage of this unit. The GNU comprehensive file GEONAMES lists Trujillo Sandstone of Dockum Group (NM,TX) (reference not given). Denver GNULEX does not. Uncertain if Trujillo Sandstone of Dockum Group is an accepted usage of the Texas and New Mexico Geol. Surveys. --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