- Usage in publication:
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- Harmony Complex, Group
- Modifications:
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- Overview
- AAPG geologic province:
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- New England province
Summary:
Harmony Group (elsewhere in this report called Complex) subdivided into Peeptoad and Acote Members [of Abasalona Formation?] and Woonasquatucket Formation following nomenclature of Kemp (1985: Univ. of KY M.S. thesis). Authors state the Harmony is the presumed oldest unit in northwestern RI and underlies the Blackstone Group. [According to table 2, Nipsachuck Formation underlies the Harmony, which would appear to contradict this statement. However, these same authors in another report (Skehan and Rast, this vol.) have included the Nipsachuck in the Harmony as the basal unit.] Authors agree with Quinn (1971) who proposed that the Ponaganset Gneiss intrudes the Harmony.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Harmony Complex
- Modifications:
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- Named
- Revised
- Dominant lithology:
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- Gneiss
- Volcanics
- Volcaniclastics
- AAPG geologic province:
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- New England province
Summary:
Harmony gneisses of Skehan (1983) is here revised as Harmony Complex. Includes the Nipsachuck Gneiss, the Absalona Formation, and the Woonasquatucket Formation as defined by Quinn (1971). Consists felsic volcanic and volcaniclastic rocks with highly deformed plutonic rocks. Complex underlies Blackstone Group in the Esmond-Dedham terrane, northern RI. Approximately 2500-3000 m thick. Age is Late Proterozoic. [Intent to formalize not stated.]
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
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