- Usage in publication:
-
- Calder Creek member
- Modifications:
-
- First used
- AAPG geologic province:
-
- Great Basin province
- Snake River basin
Summary:
Wells formation divided into (ascending order): Calder Creek, Heglar Canyon, Sublett, and Indian Fork members (all new) in Sublett Mountains, ID in the Great Basin province and Snake River basin. Overlies Milligen formation; underlies Grandeur member of Park City formation. New members shown only on a chart; no definition or description included in report. [Member names should be considered invalid.]
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Calder Creek Member
- Modifications:
-
- Not used
Summary:
Rocks formerly assigned to the Wells Formation by Bissell (1960) and by Cramer (1971) in Oneida and Cassia Cos, ID, reassigned to the Oquirrh Group because of their lithologic similarity to the Oquirrh. Rocks formerly called Calder Creek Member, basal member of Wells, are designated basal Oquirrh Group, an unnamed informal unit designation. Nomenclature chart.
Source: GNU records (USGS DDS-6; Denver GNULEX).
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 ([ ]).