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The Honey Brook Upland includes a southern region of upper amphibolite facies gneisses with the assemblage of plagioclase, dark green hornblende, and minor garnet and a northern region of low-pressure granulite facies rocks including an anorthosite suite plus gneisses with the assemblage hypersthene, mesoperthite, light green augite and dark green to brown hornblende. 40Ar/39Ar dates of coexisting hornblende and biotite from granulite gneisses, about 880 and 850 m.y., respectively, may represent cooling/uplift ages following Grenville metamorphism. The chemical trends exhibited by the mafic granulite facies gneisses and all the amphibolite facies gneisses show calc-alkaline affinities and are...

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