scholarly article by John A. Westgate et al published 1990 in Geology
scholarly article by Reuben Kachadoorian published in January 1955
scholarly article
scholarly article published 2002
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scholarly article published 1965
scientific article published on September 1959
article
scientific article published in 1983
scholarly article by Troy Lewis Pewe published in January 1975
scholarly article by Troy Lewis Pewe published 1975 in Geological Survey Professional Paper
scientific article published in October 1959
scholarly article by Troy L. Péwé published in July 1954
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