- Usage in publication:
-
- Brier slate member*
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Lake Superior region
Summary:
Pg. 30 (table 1), 35. Revised to Brier slate member of Vulcan iron-formation of Menominee group (reinstated) of Animikie series. Present in Iron and Dickinson Counties, northwestern Michigan (Lake Superior region). Overlies Traders iron-bearing member and underlies Curry iron-bearing member. Age is considered middle Precambrian (Animikie Series). As defined here, Vulcan iron-formation includes (ascending) Traders iron-bearing member, Brier slate member, Curry iron-bearing member, and Loretto slate member. Report includes stratigraphic sequence chart.
Source: US geologic names lexicon (USGS Bull. 1200, p. 477); supplemental information from GNU records (USGS DDS-6; Reston 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 ([ ]).