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Boylston Schist

Boylston Schist - Carbonaceous phyllite and schist, locally sulfidic; quartzite; calc-silicate beds.
StateMassachusetts
NameBoylston Schist
Geologic ageSilurian or Ordovician
Original map labelSObo
CommentsPart of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks)
Primary rock typephyllite
Secondary rock typeschist
Other rock typesquartzite; calc-silicate rock
Lithologic constituents
Major
Metamorphic > Schistcarbonaceous phyllite and schist, locally sulfidic
Metamorphic > Metasedimentary > Metaclastic > Phyllitecarbonaceous phyllite and schist, locally sulfidic
Minor
Metamorphic > Metasedimentary > Calc-silicate-rockcalc-silicate beds
Metamorphic > Metasedimentary > Metaclastic > Quartzite
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Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.
Geographic coverageWorcester

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