St. Catherine Formation (VTCAsc;0)

St. Catherine Formation - Purple, gray-green, and variegated slate and phyllite containing minor interbeds of white to green quartzite; locally albitic. Purple and green chloritoid-bearing slate and phyllite is within dashed line in northern Taconic Range, but not separated farther south.

State	Vermont
Name	St. Catherine Formation
Geologic age	Cambrian
Original map label	Csc
Comments	Part of Taconic Range
Primary rock type	slate
Secondary rock type	phyllite
Other rock types	quartzite
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Phyllitepurple and green chloritoid-bearing slate and phyllite Metamorphic > Metasedimentary > Metaclastic > Slatepurple and green chloritoid-bearing slate and phyllite Minor Metamorphic > Metasedimentary > Metaclastic > Quartziteminor interbeds of white to green quartzite; locally albitic
Map references	Nicholson, S.W., Dicken, C.L., Horton, J.D., Foose, M.P., Mueller, J.A.L., and Hon, Rudi, 2006, Preliminary integrated geologic map databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, and Vermont: U.S. Geological Survey Open-File Report 2006-1272. [http://pubs.er.usgs.gov/publication/ofr20061272]
Unit references	Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial Geologic Map of Vermont: Vermont Geological Survey, Miscellaneous Map MISCMAP-01, scale 1:250,000.
Geographic coverage	Addison - Bennington - Rutland