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Ironbound Mountain Formation - amphibolite member

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Hornblende amphibolite and hornblende-plagioclase-quartz granofels; interpreted as metabasalt and mafic volcaniclastic rock. Part of the Connecticut Valley Trough.
State Vermont
Name Ironbound Mountain Formation - amphibolite member
Geologic age Lower Devonian
Lithologic constituents
Major
Metamorphic > Granoblastic > Granofels (Amphibolite)Hornblende amphibolite and hornblende-plagioclase-quartz granofels; interpreted as metabasalt and mafic volcaniclastic rock.
Metamorphic > Amphibolite (Amphibolite)Hornblende amphibolite and hornblende-plagioclase-quartz granofels; interpreted as metabasalt and mafic volcaniclastic rock.
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 Essex