- Usage in publication:
-
- Paint River group*
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Slate
- Iron-formation
- Graywacke
- AAPG geologic province:
-
- Lake Superior region
Summary:
Pg. 30 (table 1), 37. Paint River group, uppermost of four groups in the Animikie series; younger than Baraga group. Comprises (ascending) Dunn Creek slate, Riverton iron-formation, Hiawatha graywacke, Stambaugh formation, and Fortune Lakes slate (all new). In previous reports, these strata were considered part of the Michigamme slate. Iron River-Crystal Falls district is a deep tightly folded major synclinal structure incompletely bounded by Badwater greenstone; east of Crystal Falls, greenstone is absent and strata of the district proper rest directly on Michigamme slate. Recognition of stratigraphic position of Badwater greenstone formed basis for definition of Paint River group. Age is middle Precambrian (Animikie Series). Report includes stratigraphic sequence chart.
Named from exposures near Paint River, which drains the northern and eastern part of the Iron River-Crystal Falls district, eastern Iron and western Dickinson Cos., Northern Peninsula, northwestern MI (Lake Superior region).
Source: US geologic names lexicon (USGS Bull. 1200, p. 2898-2899).
- Usage in publication:
-
- Paint River Group*
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Lake Superior region
Summary:
Pg. 2845 (fig. 2, stratigraphic chart compiled from Leith and others, 1935; James, 1958; Gair and Thaden, 1968). Paint River Group of James (1958) reassigned to newly named Marquette Range Supergroup (replaces †Animikie series of James, 1958, south of Lake Superior, in Michigan and Wisconsin). Present in Iron River-Crystal Falls district. Includes (ascending) Dunn Creek Slate, Riverton Iron-Formation, Hiawatha Graywacke, Stambaugh Formation, and Fortune Lakes Slate. Overlies Baraga Group. Age is middle Precambrian.
Source: Publication.
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 ([ ]).