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An intrusive complex consisting of hornblende metadiorite, hornblende metatonalite, granodiorite, and granite cropping out around the perimeter of Peavy Pond (a large impoundment) within the Lake Mary quadrangle. The surrounding Hemlock Volcanics and Michagamme Slate formations have been metamorphosed to high grade at the contacts with this intrusive body.
4 entries listed. 3 valid minerals.
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Bayley, R. W. (1959) "Geology of the Lake Mary Quadrangle, Iron County, Michigan." U. S. Geological Survey Bulletin 1077, U. S. Government Printing Office, Washington, pl. 1, pp. 75 - 94.