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0200096942 20080227100326.0 s1989 dcuab frb |000|||eng | NGL n-us-co a科罗拉多州查菲县和冈尼森县芒特埃特纳火山中心的地质. ychi Toulmin, Priestley. Geology of the Mount Aetna volcanic center, Chaffee and Gunnison Counties, Colorado : a description of a deeply eroded mid-Tertiary volcano on the southern fringes of the Mount Princeton batholith in the Sawatch Range / by Priestley Toulmin, III and Jane M. Hammarstrom. Washington : ; Denver, CO : U.S. G.P.O. ; ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, [1989] v, 44 p. : ill., maps ; 28 cm. U.S. Geological Survey bulletin ; 1864 One col. map on folded leaf in pocket. Includes bibliographical references (p.39-42). Volcanic ash, tuff, etc. ; Volcanic ash, tuff, etc. ; Volcanism ; Volcanism ; Geology ; Geology Colorado ; Chaffee County. ; Colorado ; Gunnison County. ; Colorado ; Chaffee County. ; Colorado ; Gunnison County. ; Colorado ; Chaffee County. ; Colorado ; Gunnison County. aHammarstrom, Jane Marie. NGL 448639 P 254.2 B87 v1864 akaz b1 ekaz070g