Mineral Resources On-Line Spatial Data
|Geologic age||Lower Ordovician and Cambrian|
|Original map label||OEr|
|Comments||Part of Rowe-Hawley Zone (Ordovician and Older Rocks) Despite uncertainties, age of Rowe is probably only slightly, if at all, older than earliest Cambrian and almost certainly no younger than Early or possibly Middle Ordovician (Stanley and Hatch, 1988) per MA014.|
|Primary rock type||schist|
|Secondary rock type|
|Other rock types|
Metamorphic > SchistLight-green to light-bluish-gray schist having thin granular quartz lenses and lamellae. Kyanite and staurolite typical at higher grades.
Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.
|Counties||Berkshire - Franklin - Hampden - Hampshire|
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