Oliverian Domes, Related Plutonic Rocks, and Mantling Ammonoosu;C Volcanics of the Bronson Hill Anticlinorium, New England Appalachians
Oliverian Domes, Related Plutonic Rocks, and Mantling AmmonoosU;c Volcanics of the Bronson Hill Anticlinorium, New England Appalachians U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1516 Oliverian Domes, Related Plutonic Rocks, and Mantling Ammonoosuc Volcanics of the Bronson Hill Anticlinorium, New England Appalachians By GERHARD W. LEO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1516 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 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON: 1991 U.S. DEPARTMENT OF THE INTERIOR MANUEL LUJAN, JR., Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Library of Congress Cataloging in Publication Data Leo, Gerhard W. Oliverian domes, related plutonic rocks, and mantling Ammonoosuc Volcanics of the Bronson Hill Anticlinorium, New England Appalachians I by Gerhard W. Leo p. em. - (U.S. Geological Survey professional paper; 1516) Includes bibliographical references. Supt. of Docs. no.: I 19.19:1516 1. Intrusions (Geology)-New England Region. 2. Geology, Stratigraphic-Ordovician. 3. Geology, Stratigraphic-Silurian. 4. Geology-New England Region. I. Title. II. Series. QE611.5.N49L46 1991 551. 7'3'0974-dc20 90-4951 CIP For sale by the Books and Open-File Reports Section, U.S. Geological Survey, Federal Center, Box 25425, Denver, CO 80225 CONTENTS Page Abstract ........................................................................... 1 Oliverian Plutonic Suite and Other Rocks in Cores of Introduction......................................................................
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