Partridge Formation

Dark-gray to grayish-black, rusty-weathering sulfidic slate and phyllite interlayered with felsic volcanic rocks and tuffs, and amphibolite (Opa). Stratified rocks of the Bronson Hill arch and Sawyer Mountain belt.
State Vermont
Name Partridge Formation
Geologic age Upper Ordovician
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhylliteDark-gray to grayish-black, rusty-weathering sulfidic slate and phyllite.
Metamorphic > Metasedimentary > Metaclastic > SlateDark-gray to grayish-black, rusty-weathering sulfidic slate and phyllite.
Minor
Igneous > Volcanic > Felsic-volcanic (Pyroclastic-tuff)
References
NGMDB product
Counties Caledonia - Essex - Orange - Windham - Windsor