|Geologic age||Lower Ordovician|
|Comments||Part of Taconic-Berkshire Zone (Ordovician and Older Rocks) Units Osg and Osf descriptions are combined on printed map; separated them into two descriptions here.|
|Primary rock type||limestone|
|Secondary rock type|
|Other rock types|
Sedimentary > Carbonate > Limestone (Bed)Local layers of punky weathering crossbedded quartzose limestone near base.
Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.
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.