Harmony Group - Absalona Formation (RIZha;0)

Harmony Group - Absalona Formation

Gray, medium- to coarse-grained biotite granite gneiss characterized by alkali feldspar porphyroblasts. Consists of biotite, hornblende, quartz, microcline, microperthite, albite, epidote, garnet, and chlorite. Subordinate amounts of quartz-biotite schist, amphibolite, and quartzite occur as layers and isolated bodies.

State	Rhode Island
Name	Harmony Group - Absalona Formation
Geologic age	Late Proterozoic? or older?
Lithologic constituents	Major Metamorphic > GneissGray, medium- to coarse-grained biotite granite gneiss characterized by alkali feldspar porphyroblasts. Consists of biotite, hornblende, quartz, microcline, microperthite, albite, epidote, garnet, and chlorite. Minor Metamorphic > Schist > Mica-schist > Biotite-schistquartz-biotite schist Metamorphic > Metasedimentary > Metaclastic > Quartzite Metamorphic > Amphibolite
Comments	Part of Esmond-Dedham Subterrane (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	NGMDB product page for 19719
Counties	Providence

Harmony Group - Absalona Formation

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.