Baraga Group; Michigamme Formation; Gray to black slate

Strongly cleaved. Represents lower stratigraphic part of formation
State Michigan
Name Baraga Group; Michigamme Formation; Gray to black slate
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Slategray to black slate of Michigamme Formation
Comments Continental margin assemblage (north of Niagara Fault)
References
NGMDB product
Counties Baraga - Marquette