Usage:
Grand Castle Formation (UT*)
Geologic age:
Tertiary*
Paleocene*
Type section, locality, area and/or origin of name:
Type section (composite): base of lower and middle units on west side of Grand Castle, in NE/4 sec. 6, T. 35 S., R. 8 W.; base of upper unit on south side of Grand Castle, in NW/4 NE/4 sec. 8, T. 35 S., R. 8 W., Parowan quadrangle, Iron Co., UT. Named from Grand Castle (Goldstrand and Mullett, 1997).
AAPG geologic province:
Great Basin province*
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 ([ ]).