found: American mineralogist, 1987:volume 72, page 1271-1972 (Memorial of Ogden L. Tweto, 1912-1983; Ogden L. Tweto, a Life Fellow of the Mineralogical Society of America, died at his home in Lakewood, Colorado, on November 23, 1983; born of Norwegian parents in Abercrombie, North Dakota, Ogden moved with his family at an early age to Missoula, Montana; he later attended the University of Montana, completing a B.A. degree in 1934 and an M.A. in 1937; he then enrolled in a doctoral program at the University of Michigan; his pursuit of his Ph. D. degree was interrupted by work with the U.S. Geological Survey on strategic minerals during World War II, and confirmation of the degree was delayed untll 1947; after the war, Tweto continued an association with the Geological Survey that formed the basis for his career; he was chief of the Southern Rocky Mountains Branch (1961-1965), assistant chief geologist for economic geology (1965-1968), and research geologist (1968-1983); except for his tour of duty as assistanct chief geologist in Washington, D.C., he spent most of his professional life in the southern Rocky Mountains, mainly in Colorado)
