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mods: Oliverian domes, related plutonic rocks, and mantling Ammonoosuc volcanics of the Bronson Hill anticlinorium, New England Appalachians Leo, Gerhard W. creator author. Geological Survey (U.S.) issuing body. text bibliography dcu 1991 monographic eng remote 1 online resource (v, 92 pages) : illustrations, maps + 1 plate. by Gerhard W. Leo. "Major- and trace-element geochemistry of the Oliverian Plutonic Suite (Middle Ordovician to Early Silurian?), associated volcanogenic gneisses, and mantling but chemically distinct Ammonoosuc Volcanics and related trondhjemite is interpreted to indicate a transitional oceanic-continental volcanic arc in west-central New England." Includes bibliographical references (pages 80-84). n-usn-- Intrusions (Geology) New England Geology, Stratigraphic Ordovician Geology, Stratigraphic Silurian Geology New England Geology Geology, Stratigraphic Intrusions (Geology) Ordovician Geologic Period Silurian Geologic Period New England From 405 to 500 million years ago fast I 19.16:1516 I 19.16:1516 Oliverian domes, related plutonic rocks, and mantling Ammonoosuc volcanics of the Bronson Hill anticlinorium, New England Appalachians Leo, Gerhard W. (DLC) 90004951 (OCoLC)21973563 U.S. Geological Survey professional paper ; 1516 https://purl.fdlp.gov/GPO/gpo93389 COP 141123 20181023093841.0 in00004022257 eng