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Nature 392, 218-219 (19 March 1998) | doi:10.1038/32505

Dating in doubt as researcher is probed

Rex Dalton

A prominent geographer at Arizona State University (ASU), whose rock-surface dating method has been used internationally to age petroglyphs, as well as landforms at a nuclear waste dump site, is under scrutiny for possible scientific misconduct, according to officials.Authorities are trying to determine whether Ronald I.