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: 7, 1973

Late Cretaceous age for molybdenite mineralization in Custer County Idaho (260 KB PDF), p. 1.
— R.F. Marvin, C.M. Tschanz, H.H. Mehnert, and Mangum

K-Ar ages on post Early Jurassic granodiorite from the southern Pine Nut Range, western Nevada (325 KB PDF), p. 3.
— D.C. Noble, E. H. McKee, and R.A. Schweickert

K-Ar age of ore deposition, Talapoosa mining district, Lyon County, Nevada (168 KB PDF), p. 5.
— Larry J. Garside and Miles L. Silberman

K-Ar dates on a basalt flow and a vent plug in north- east Harding County, northeastern New Mexico (209 KB PDF), p. 7.
— Federick D. Trauger

K-Ar dates for biotite from two paleontologically significant localities: Duchesne River Formation, Utah and Chadron Formation, South Dakota (180 KB PDF), p. 11.
— Fred W. McDowell, John A. Wilson, and John Clark

K-Ar dates for sills from the Neahkahnie Mountain and Tillamook Head areas of the northwestern Oregon coas (191 KB PDF), pp. 13-16.
— Alan R. Niem and Frank B. Cressy

K-Ar dates from the Valley Copper and Lornex deposits, Guichon Creek Batholith, Highland Valley district, British Columbia (230 KB PDF), pp. 17-20.
— Michael B. Jones, Robert A. Schmuck, and Cyrus W. Field

Geochronology of the Maclaren metamorphic belt, south-central Alaska (305 KB PDF), pp. 21-25.
— Thomas E. Smith and Donald L. Turner

Isochron/West, A Bulletin of Isotopic Geochronology (260 KB PDF), pp. 1-25.
— John H. Schilling, [ed.]