Canaan Mountain Formation (MACAZcm;0)

State	Massachusetts
Name	Canaan Mountain Formation
Geologic age	Lower Ordovician and Proterozoic Z
Original map label	EZcm
Comments	Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); east of Berkshire Highlands Shown as Canaan Mountain Formation of Proterozoic Z and Early Ordovician age. [GNU records indicate that this was a mistake and should have been shown as Proterozoic Z and Early Cambrian age.] per USGS Lexicon website (MA012).
Primary rock type	schist
Secondary rock type
Other rock types
Lithologic constituents	Major Metamorphic > SchistRusty-weathering, coarse garnet schist and feldspathic schist.
Map references	Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.
Unit references	Zen, E-An (ed.), Goldsmith, R. (comp.), Ratcliffe, N.M. (comp.), Robinson, P. (comp.), Stanley, R.S. (comp.), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., Wones, D.R., 1983, Bedrock Geologic Map of Massachusetts: U.S. Geological Survey, Reston, VA, scale 1: 250,000. National Cooperative Geologic Mapping Program in cooperation with the Association of American Geologists, 2004, U.S. Geological Survey, Reston, VA, URL http://ngmdb.usgs.gov/Geolex/geolex_home.html [http://ngmdb.usgs.gov/Geolex/] [http://ngmdb.usgs.gov/Geolex/geolex_home.html]
Geographic coverage	Berkshire