Geolex — PictureGorge publications
Blue Mountains province; Publication: Watkins, N.D., and Baksi, A.K., 1974, Magnetostratigraphy and oroclinal folding of the Columbia River, Steens and Owyhee Basalts in Oregon, Washington, and Idaho: American Journal of Science, v. 274, no. 2, p. 148-189. ... basalt of Monument Mountain, and basalt of Dayville. All 3 described. Age changed ...
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