Worcester Formation

Carbonaceous slate and phyllite and minor metagraywacke.
State Massachusetts
Name Worcester Formation
Geologic age Lower Devonian and Silurian
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Metamorphic > Metasedimentary > Metaclastic > Slatecarbonaceous slate
Minor
Metamorphic > Metasedimentary > Metaclastic > Metasandstone > Metagraywacke
Comments Part of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks)
References
NGMDB product
Counties Worcester