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: 33, 1982

K-Ar age bracket on the initiation of Basin and Range faulting in southeastern California (740 KB PDF), pp. 3-8.
— K.S. Murray

Eocene Mineralization at Mount Tolman (Keller) Washington, and Silver Dyke, Montana (357 KB PDF), pp. 9-10.
— R.L. Armstrong, J.E. Harakal, and V.F. Hollister

Tertiary volcanics along the eastern flank of the Pioneer Mountains, southwestern Montana (723 KB PDF), pp. 11-14.
— R.F. Marvin, E-An Zen, and H.H. Mehnert

Sr isotope initial ratios from hydrothermal vein deposits of fluorite and carbonates II: Deposits in the Zuni Moun tains, New Mexico (489 KB PDF), pp. 15-16.
— D.G. Brookins and K.T. Emanuel

New K-Ar dates from the Kirtland Formation (Cretaceous), San Juan Basin, New Mexico (386 KB PDF), pp. 17-18.
— D.G. Brookins and J.K. Rigby

The Sandia Granite, New Mexico - biotite metamorphic and whole rock Rb-Sr ages (308 KB PDF), pp. 19-20.
— D.G. Brookins and A. Majumdar

K-Ar Dates for volcanic rocks associated with Neogene sedimentary deposits in north-central and northeastern Oregon (397 KB PDF), pp. 21-22.
— R.C. Bunker, S.M. Farooqui, and R.E. Thoms

K-Ar ages of basalts from southcentral and southeastern Oregon (692 KB PDF), pp. 23-26.
— W.K. Hart and S.A. Mertzman

K-Ar and ⁴⁰Ar-³⁹Ar ages of mid-Tertiary volcanic rocks from the Western Cascade Range, Oregon (1.72 MB PDF), pp. 27-32.
— D.R. Lux

Isochron/West, A Bulletin of Isotopic Geochronology, pp. 1-32.
— John H. Schilling, Maria Adkins, Janet Amesbury, Bridgett Boulton, and Mati A. Stephens, [eds.]