- Usage in publication:
-
- Outer Conglomerate*
- Modifications:
-
- Not used
Summary:
Not used in Keweenawan Peninsula and adjacent areas of upper MI in the Lake Superior region. Formerly a named conglomerate unit above upper, mafic lava member--or Lake Shore Trap (not used) of Copper Harbor Conglomerate. Author feels name is inappropriate both as formal stratigraphic name and as unit defining base of upper Keweenawan. Is of only local significance because base cannot be traced west from Keweenaw Peninsula. Stratigraphic chart. Is middle Precambrian in age.
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 ([ ]).