Biddie Knob Formation

Predominantly green, purple and purplish-red, chloritic hematitic slate and phyllite, massive to thinly bedded. Has rare thin beds of white vitreous quartzite and contains abundant chloritoid. Underlies the Bird Mountain Grit (of Dale, 1900) and grades into the green slate of the Mettawee slate facies in the Bull Formation, probably in part correlative with the green phyllite member of the Netop Formation (CZngs) of the Dorset Mountain slice. Rocks of the Giddings Brook, Sunset Lake, and Bird Mountain slices. Part of the Taconic Allochthon.
State Vermont
Name Biddie Knob Formation
Geologic age Lower Cambrian and Neoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhyllitePredominantly green, purple and purplish-red, chloritic hematitic slate and phyllite.
Metamorphic > Metasedimentary > Metaclastic > SlatePredominantly green, purple and purplish-red, chloritic hematitic slate and phyllite.
Incidental
Metamorphic > Metasedimentary > Metaclastic > QuartziteHas rare thin beds of white vitreous quartzite and contains abundant chloritoid.
References
NGMDB product
Counties Rutland