The Chopawamsic Formation A New Stratigraphic Unit in the Piedmont of Northeastern Virginia
By D. L. SOUTHWICK, JOHN C. REED, JR., and R. B. MIXON
CONTRIBUTIONS TO STRATIGRAPHY
GEOLOGICAL SURVEY BULLETIN 1324-D
Description of a sequence of felsic, intermediate, and mafic metavolcanic and metasedimentary rocks UNITED STATES DEPARTMENT OF THE INTERIOR
ROGERS C. B. MORTON, Secretary
GEOLOGICAL SURVEY
William T. Pecora, Director
Library of Congress catalog card No. 74-610531
UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON: 1971 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 10 cents (paper cover) CONTENTS