Page 1 JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 89, NO. B10 ...

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Trip 4, 22 pp., Rocky Mt. Sec. , Geol. Soc. Am..., 1975. Armstrong, R. L. W. P. Leeman, and H. E. Malde,. K-Ar dating, Quaternary and Neogene volcanic rocks of ...