Usage:
Fales Sandstone Member of Mesaverde Formation (WY*)
Originally called Phayles Reef and Phayles.
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Type section: on northeast flank of Rattlesnake Hills in southwestern part of sec. 4, T. 33 N., R. 87 W., Natrona Co., central WY. At this locality basal sandstone of member forms ridge locally known as "Phayles Reef" (Barwin, 1959, 1961).
AAPG geologic province:
Wind River 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 ([ ]).