- Usage in publication:
-
- Barren Ridge Limestone*
- Modifications:
-
- Named
- Dominant lithology:
-
- Limestone
- Siltstone
- AAPG geologic province:
-
- Alaska West-Central region
Summary:
Unit is named the Barren Ridge Limestone for Barren Ridge located in the southeastern part of the McGrath 1:250,000 quad, AK. Consists of relatively pure limestone, calcareous siltstone, and sandy limestone. Lower contact with the Terra Cotta Mountains Sandstone in Graptolite Canyon may be thrust fault, while contact elsewhere is covered; upper contact of unit is unknown. Thickness is 300 m. Age is here considered to be Devonian(?) as unit is unfossiliferous.
Source: GNU records (USGS DDS-6; Menlo 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 ([ ]).