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Maps showing distribution, composition, and age of early and middle Cenozoic volcanic centers in Oregon and Washington
Distribution, composition, and age of early and middle Cenozoic volcanic centers in OR and WA
2 maps : color ; each 78 x 67 cm., on sheets 96 x 115 cm. and 94 x 122 cm., folded in envelope 30 x 24 cm. + 1 pamphlet (12 pages ; 28 cm.)
Sheet 1. Distribution and composition map -- Sheet 2. Mode of origin and age map.
U.S. Department of the Interior, U.S. Geological Survey ; by Robert G. Luedke.
Includes 2 index maps and 7 ancillary maps.
Includes bibliographical references (pages 2-12 of pamphlet).
Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-2291-D