GEOLEX database Geologic Unit: Bull Canyon Usage: Bull Canyon Formation (NM) Age: Triassic, Late Norian Geologic Province: Palo Duro basin Las Vegas-Raton basin Areal Extent: NM(ec) Type Locality: Type section: near mouth of Bull Canyon, in sec. 10, T. 9 N., R. 20 E., Guadalupe Co., NM (Lucas and Hunt, 1989). Unit Name History: Named (Lucas and Hunt, 1989). Overview (Hunt, 1989). Areal limits (Lucas and others, 1990). 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