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Isochron/West
![Isochron West logo](/publications/periodicals/isochronwest/IW_Cover_logo-380.png)
Isochron/West was published at irregular intervals from 1971 to 1996. The journal was patterned after the journal Radiocarbon and covered isotopic age-dating (except carbon-14) on rocks and minerals from the Western Hemisphere. Initially, the geographic scope of papers was restricted to the western half of the United States, but was later expanded. The journal was sponsored and staffed by the New Mexico Bureau of Mines (now Geology) & Mineral Resources and the Nevada Bureau of Mines & Geology.
Papers from all back-issues are accessible for free in PDF format.
Should you wish to publish a geoscience paper of regional interest on any topic please consider our journal New Mexico Geology.
Issue: 32, 1981
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K-Ar ages of plutonism and mineralization, western Cascades, Oregon and southern Washington: Additional information (207 KB PDF), p. 3.— S.G. Power, C.W. Field, R.L. Armstrong, and J.E. Harakal
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K-Ar ages of the Riolita Tilzapotia volcanic activity, Guerrero State, Mexico and its stratigraphic implications (357 KB PDF), p. 5.— E. Linares and J. Urrutia-Fucugauchi
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K-Ar ages for igneous rocks and vein minerals from the Christmas Mine area, Arizona (951 KB PDF), p. 7.— E.H. McKee and R.A. Koski
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Fission-track ages of air-fall tuffs in Pliocene basin-fill sediments near 111 Ranch, Graham County, Arizona (654 KB PDF), pp. 13-16.— J.J. Dickson and G.A. Izett
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New K-Ar ages from the Eldora-Bryan stock and Idaho Springs Formation, Front Range, Colorado (321 KB PDF), pp. 17-18.— D.G. Brookins and Mark S. Abashian
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Markedly discordant K-Ar ages for coexisting biotite and muscovite from a two-mica granite in the Toana Range, EIko County, Nevada (332 KB PDF), pp. 19-20.— D.E. Lee and R.F. Marvin
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Rb-Sr isochron ages of two Precambrian igneous rock units, Colfax County, New Mexico (329 KB PDF), pp. 21-24.— D.G. Brookins and T.L. Leyenberger
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New K-Ar dates from the Wild Rogue southwestern Oregon (543 KB PDF), pp. 27-30.— F. Gray and E.H. McKee
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Miocene K-Ar age determined for Precambrian quartzite in extreme northwest Utah (322 KB PDF), p. 31.— D.E. Lee and R.F. Marvin
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Isochron/West, A Bulletin of Isotopic Geochronology, pp. 1-32.— John H. Schilling, Mati A. Stephens, Bridgett Boulton, and Janet Amesbury, [eds.]