Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Massachusetts
|Geologic age||Upper Silurian|
|Original map label||Sfs|
|Comments||Part of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks) Secondary unit description per MA006. Conodonts indicative of earliest Devonian 'woschmidti' to 'eurekaensis' Zones recovered from regionally metamorphosed marbles of the lower amphibolite facies of the Fitch Formation at the fossil locality near Bernardston, MA, refine the age of the Fitch in this area and extend the regional upper age limit of the Fitch, and confirm the existence of the inverted limb of the Bernardston nappe per MA008.|
|Primary rock type||calc-silicate rock|
|Secondary rock type||schist|
|Other rock types|
Metamorphic > Metasedimentary > Calc-silicate-rocksulfidic calc-silicate
Metamorphic > Schistminor sulfidic schist
Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.
|Geographic coverage||Hampshire - Worcester|
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