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Poultney Formation

Poultney Formation - White weathering, well-laminated gray slate and chert.
StateMassachusetts
NamePoultney Formation
Geologic ageMiddle and Lower Ordovician
Original map labelOpo
CommentsPart of Taconic-Berkshire Zone (Ordovician and Older Rocks); in the Taconic Allochthon
Primary rock typeslate
Secondary rock typechert
Other rock types
Lithologic constituents
Major
Sedimentary > Chemical > Chert
Metamorphic > Metasedimentary > Metaclastic > Slate
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Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MAOpo;0
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