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Newbury Volcanic Complex

Newbury Volcanic Complex - Micrographic rhyolite, intrudes DSnu, DSna, DSnl.
State Massachusetts
Name Newbury Volcanic Complex
Geologic age Lower Devonian and Upper Silurian
Comments Part of Milford-Dedham Zone (Tertiary and Older Rocks)
Primary rock type rhyolite
Secondary rock type
Other rock types
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > Rhyolitemicrographic rhyolite
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Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.
Counties Essex