Washburn Brook Formation - metamorphosed sedimentary breccia

Metamorphosed sedimentary breccia interlayered with dark-gray slate and micaceous siltstone. Clasts include light-colored, fine-grained metasandstone and metasiltstone of the Albee Formation, dark-gray or greenish-gray slate, and coticule-bearing metasiltstone and chert as well as sparse quartz pebbles. Matrix consists of fine-grained metasandstone, metasiltstone, or dark-gray or greenish-gray slate. Stratified rocks of the Bronson Hill arch and Sawyer Mountain belt.
State Vermont
Name Washburn Brook Formation - metamorphosed sedimentary breccia
Geologic age Upper and Middle Ordovician
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > MetaconglomerateMetamorphosed sedimentary breccia; Clasts include light-colored, fine-grained metasandstone and metasiltstone of the Albee Formation, dark-gray or greenish-gray slate, and coticule-bearing metasiltstone and chert as well as sparse quartz pebbles. Matrix consists of fine-grained metasandstone, metasiltstone, or dark-gray or greenish-gray slate.
Sedimentary > Clastic > Siltstone (Bed)Interlayered with micaceous siltstone.
Metamorphic > Metasedimentary > Metaclastic > SlateInterlayered with dark-gray slate.
References
NGMDB product
Counties Essex