West Castleton Formation

Dark-gray to black, fine-grained slate and phyllite, interbedded with thinly laminated bluish-black fine-grained limestone, limestone conglomerate. Unit is interbedded near the base with green phyllite and sooty-punky-weathering calcitic quartz wacke and limestone of the Browns Pond Formation, which is shown separately where mapped. Rocks of the Giddings Brook, Sunset Lake, and Bird Mountain slices. Part of the Taconic Allochthon.
State Vermont
Name West Castleton Formation
Geologic age Middle and Lower Cambrian
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhylliteDark-gray to black, fine-grained slate and phyllite.
Metamorphic > Metasedimentary > Metaclastic > SlateDark-gray to black, fine-grained slate and phyllite.
Minor
Sedimentary > Clastic > ConglomerateLimestone conglomerate.
Sedimentary > Carbonate > Limestone (Bed)Interbedded with thinly laminated bluish-black fine-grained limestone, limestone conglomerate.
References
NGMDB product
Counties Addison - Bennington - Rutland