Bull Formation - Mettawee slate facies

Predominantly greenish-gray to pale-lustrous-green chlorite-muscovite-quartz phyllite; and green and purple, bedded and mottled phyllite. Locally contains boudins and thin beds of limestone and pods of pinkish-gray to cream-white dolostone, and minor quartzite. Unit interfingers with the West Castleton Formation above and laterally grades into the Bomoseen Graywacke Member. Also shown as CZnm (Mettawee Member of the Nassau Formation of Potter, 1972). Rocks of the Giddings Brook, Sunset Lake, and Bird Mountain slices. Part of the Taconic Allochthon.
State Vermont
Name Bull Formation - Mettawee slate facies
Geologic age Neoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhyllitePredominantly greenish-gray to pale-lustrous-green chlorite-muscovite-quartz phyllite; and green and purple, bedded and mottled phyllite.
Minor
Sedimentary > Carbonate > Dolostone (Lens)Pods of pinkish-gray to cream-white dolostone.
Sedimentary > Carbonate > Limestone (Bed)Locally contains boudins and thin beds of limestone.
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Comments Unit is labeled CZbm on printed map, but has an age of Neoproterozoic only. Changed symbol to Zbm.
References
NGMDB product
Counties Addison - Bennington - Rutland