Usage:
Lykins Formation (CO*)
Subunits:
(alphabetical) --all in CO: Bergen Shale Member, Blaine Gypsum Member, Chaquaqua Member, Falcon Limestone Member, Forelle Limestone Member*, Freezeout Member*, Glennon Limestone Member, Harriman Shale Member, Park Creek Limestone Member, [†?]Red Canyon member (informal), Strain Shale Member.
Geologic age:
Permian to Early Triassic*
Type section, locality, area and/or origin of name:
Named from Lykins Gulch, in T. 2 N., R. 71 W., Boulder Co., CO (Fenneman, 1905).
AAPG geologic province:
Denver basin*
Las Animas arch*
Las Vegas-Raton 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 ([ ]).