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: 16, 1976

K-Ar dates from Arizona, Montana, Nevada, Utah, and Wyoming (990 KB PDF), p. 1.
— R.L. Armstrong, R.C. Speed, W.C. Graustein, and A.Y. Young

K-Ar age bracket on a Late Jurassic thrust fault in southeastern California (501 KB PDF), p. 7.
— S.C. Moore and J.E. Harakal

Late Cretaceous and Eocene ages for hydrothermal alteration and mineralization, Bayhorse district and vicinity, Custer County, Idaho (477 KB PDF), p. 11.
— D.H. McIntyre, S.W. Hobbs, R.F. Marvin, and H.H. Mehnert

K-Ar age of mineralization. Silver Peak (Red Mountain) mining district, Esmeralda County, Nevada (411 KB PDF), pp. 13-14.
— W.J. Keith, M.L. Silberman, and R.C. Erd

Summary of radiometric ages of Tertiary volcanic and selected plutonic rocks in Nevada. Part V: northeastern Nevada (2.11 MB PDF), pp. 15-28.
— E.H. McKee, A.L. Tarshis, and R.F. Marvin

K-Ar age determinations on Pliocene basalts from the Espanola Basin, New Mexico (332 KB PDF), pp. 29-30.
— Kim Manley

K-Ar dates from the Stevens Ridge Formation, Cascade Range, central Washingto (285 KB PDF), pp. 31-32.
— J.F. Fischer

Rb-Sr whole rock age of gneisses from the Horse Creek area, Tobacco Root Mountains, Montana (462 KB PDF), pp. 33-36.
— P.A. Mueller and W.S. Cordua

Isochron/West, A Bulletin of Isotopic Geochronology (990 KB PDF), pp. 1-36.
— John H. Schilling and Judy R. Burlbaw, [eds.]