- Mineral Resources
- Online Spatial Data
- Geology
- by state
- Vermont
Somerset Reservoir Granite - aplitic to pegmatitic granite
White to pinkish-gray, medium-grained plagioclase-microcline-perthite aplitic to pegmatitic granite forms dikes in country rocks and irregular border facies. U-Pb zircon upper-intercept age of 965±4 Ma, no. 19 (Karabinos and Aleinikoff, 1990). Cardinal Brook Intrusive Suite (965±4 Ma to 945±7 Ma). Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.
State |
Vermont |
Name |
Somerset Reservoir Granite - aplitic to pegmatitic granite |
Geologic age |
Neoproterozoic |
Lithologic constituents |
Major
Igneous > Plutonic > Granitic > Leucocratic-granitic (Dike or sill)White to pinkish-gray, medium-grained plagioclase-microcline-perthite aplitic to pegmatitic granite forms dikes in country rocks and irregular border facies.
|
Comments |
Original unit label is Y3Cbsa, but age listed as Neoproterozoic. Changed label to ZCbsa. |
References |
Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.
https://pubs.er.usgs.gov/publication/sim3184 |
NGMDB product |
|
Counties |
Windham |