Earth Science Talk
Dr. Rebecca Flowers of the University of Colorado will present an informal talk about her research: "Apatite 4He/3He and (U-Th)/He Evidence for An Ancient Grand Canyon." Flowers has proposed that the Grand Canyon is 65 million to 70 million years old, which is contrary to the prevailing hypothesis that the canyon is ~6 million years old. http://nyti.ms/Ws3sTu . Noon in MSEC 101.