Metagraywacke

Gray, fine-grained, thin- to thick-bedded, commonly graded graywacke and slate in Marenisco, Mich. area
State Michigan
Name Metagraywacke
Geologic age Late Archean
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Metasandstone > Metagraywacke
Metamorphic > Metasedimentary > Metaclastic > Slate
Comments Continental margin assemblage (north of Niagara Fault)
References
NGMDB product
Counties Gogebic - Ontonagon