Iron-rich garnet-pyroxene gneisses occur as layers in hornblende granulite subfacies metasediments at Bear Mountain, New York. Although these gneisses bear a superficial resemblance to both eclogites and skarns, their chemical compositions suggest that they are metamorphosed ferruginous sediments of the chert-carbonate type. Such rocks have not been noted before in the Highlands metamorphic belt.

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