Paint River Group; Lower part

Includes Stambaugh Formation, Hiawatha Graywacke, Riverton Iron-formation, and Dunn Creek Slate (James and others, 1968). Correlated with lower part of Baraga Group
State Michigan
Name Paint River Group; Lower part
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > SlateIncludes Stambaugh Formation, Hiawatha Graywacke, Riverton Iron-formation, and Dunn Creek Slate (James and others, 1968).
Sedimentary > Chemical > Banded-iron-formationIncludes Stambaugh Formation, Hiawatha Graywacke, Riverton Iron-formation, and Dunn Creek Slate (James and others, 1968).
Sedimentary > Clastic > Sandstone > GraywackeIncludes Stambaugh Formation, Hiawatha Graywacke, Riverton Iron-formation, and Dunn Creek Slate (James and others, 1968).
Comments Continental margin assemblage (north of Niagara Fault). This unit is labeled "Xpl" on paper map of Sims (1992) but was changed to "Xpi" in digital file of Cannon et al. (1997). Description here is the same description as used for "Xpl" on paper map. Reference: James and others, 1968, Geology and ore deposits of the Iron River-Crystal Falls district, Iron County, Michigan: U.S. Geological Survey Professional Paper 570, 134 p.
References
NGMDB product
Counties Iron