State | Rhode Island |
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Name | Granites of southeastern Rhode Island - granite |
Geologic age | Late Proterozoic |
Lithologic constituents | Major
Igneous > Plutonic > Granitic > GranitePink to gray, coarse-grained, equigranular rock composed of microcline, perthite, plagioclase, quartz, and accessory biotite, sphene, zircon, and opaque minerals; secondary chlorite and muscovite. Generally massive, but locally foliated and lineated.
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Comments | Part of Esmond-Dedham Subterrane (East Bay Area). Granites of southeastern Rhode Island - may be correlative with varieties of the Esmond Igneous Suite, from the West Bay Area. |
References | Hermes, O.D. (comp.), Gromet, L.P. (comp.), Murray, D.P. (comp.), Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock geologic map of Rhode Island: Rhode Island Map Series No. 1, Kingston, Rhode Island, scale 1:100,000. |
NGMDB product | |
Counties | Bristol - Newport |