Coal Mine Brook Formation

Fossiliferous, carbonaceous slate and garnet phyllite with a lens of meta-anthracite; conglomerate and arkose.
State Massachusetts
Name Coal Mine Brook Formation
Geologic age Middle Pennsylvanian
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Slatefossiliferous, carbonaceous slate
Metamorphic > Metasedimentary > Metaclastic > Phyllitegarnet phyllite
Minor
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Sandstone > Arkose
Incidental
Metamorphic > Metasedimentarywith a lens of meta-anthracite
Comments Part of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks)
References
NGMDB product
Counties Worcester