Glauconite from the Precambrian belt series, Montana

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Abstract

Glauconite from the upper part of the Missoula Group of the Belt Series, Flathead County, Montana, has been dated at 1070 million years by potassium-argon and rubidium-strontium analyses. This is the first glauconite of Precambrian age reported in North America.

Suggested Citation

Gulbrandsen, R.A., Goldich, S., and Thomas, H., 1963, Glauconite from the precambrian belt series, Montana: Science, v. 140, no. 3565, p. 390-391.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Glauconite from the Precambrian belt series, Montana
Series title Science
DOI 10.1126/science.140.3565.390
Volume 140
Issue 3565
Year Published 1963
Language English
Publisher American Association for the Advancement of Science
Description 2 p.
First page 390
Last page 391
Country United States
State Montana
County Flathead County
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