Usage:
Jackpile Sandstone Member of Morrison Formation (NM*)
[?] Jackpile Bed of Brushy Basin Member of Morrison Formation (NM)
Geologic age:
Late Jurassic or Early Cretaceous*
Type section, locality, area and/or origin of name:
Type section: in sec. 10, T. 10 N., R. 5 W., Cibola Co., NM. Named from Jackpile Mine, Valencia Co., NM (Owen and others, 1984).
Traced from Laguna section, in sec. 28, T. 10 N., R. 5 W., in nearly continuous exposures, into ore-bearing sandstone at Jackpile mine of Anaconda Copper Mining Company, Valencia Co., northwestern NM (Freeman and Hilpert, 1956).
AAPG geologic province:
San Juan basin*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).