Isochron/West

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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.

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Issue: 57, 1991

K-Ar age of silicic volcanic rocks within the lower Columbia River basalt group at Timber Butte, Boise and Gem counties, west-central Idaho (786 KB PDF), pp. 3-7.
— D.M. Clemens and S.H. Wood

New K-Ar ages of mafic lavas from the basin and range- cascade transition zone in northeastern Califronia and southern Oregon (740 KB PDF), pp. 8-11.
— K. Mallin and W.K. Hart

New K-Ar ages for Pliocene mafic to intermediate volcanic rocks in the Reveille Range, Nevada (780 KB PDF), pp. 12-16.
— T.R. Naumann, E.I. Smith, M. Shafiqullah, and P.E. Damon

New K-Ar dates for late Miocene to early Pliocene mafic volcanic rocks in the Lake Mead area, Nevada and Arizona (707 KB PDF), pp. 17-20.
— D.L. Feuerbach, E.I. Smith, M. Shafiqullah, and P.E. Damon

K-Ar and fission-track ages (dates) of volcanic intrusive, altered, and metamorphic rocks in the Mohave Mountains area, west- central Arizona (2.64 MB PDF), pp. 21-32.
— J.K. Nakata, M.A. Pernokas, K.A. Howard, J.E. Nielson, and J.R. Shannon

Isochron/West, A Bulletin of Isotopic Geochronology, pp. 1-32.
— John H. Schilling, Rayetta Buckley, and Carol A. Hjellming, [eds.]