Brent Dalrymple
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G. Brent Dalrymple is an American geologist, author of The Age of the Earth and Ancient Earth, Ancient Skies, and National Medal of Science winner.
After receiving a Ph.D. from University of California, Berkeley, Dalrymple went to work at the U.S. Geological Survey (USGS) in Menlo Park, California. In 1994 he left the USGS to accept a position at Oregon State University, where he served on the faculty until retiring in 2001. He is a member of the National Academy of Sciences.