Bull Formation - Mettawee slate facies (VTZbm;0)

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	Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000. https://pubs.er.usgs.gov/publication/sim3184
NGMDB product	NGMDB product page for 96860
Counties	Addison - Bennington - Rutland

Bull Formation - Mettawee slate facies

Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.