1. Mineral Resources
  2. Online Spatial Data
  3. Geology
  4. by state
  5. Massachusetts

Dalton Formation

XML
JSON
Shapefile
Orangish-gray, gray, and light-greenish-gray muscovite-quartz schist and interlayered feldspathic quartzite and quartz conglomerate; minor beds of rusty albitic schist.
State Massachusetts
Name Dalton Formation
Geologic age Lower Cambrian and Proterozoic Z
Lithologic constituents
Major
Metamorphic > Schist > Mica-schist > Muscovite-schistmuscovite-quartz schist; minor beds of rusty albitic schist.
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartziteinterlayered feldspathic quartzite
Incidental
Sedimentary > Clastic > Conglomerateinterlayered quartz conglomerate
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks)
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., and Wones, D.R., 1983, Bedrock Geologic Map of Massachusetts: U.S. Geological Survey, Reston, VA, scale 1: 250,000.

https://pubs.er.usgs.gov/publication/70046713
NGMDB product
Counties Berkshire