K. Nishizumi, C.P. Kohl, J.R. Arnold, University of California, San Diego

E.M. Shoemaker, USGS, Flagstaff, AZ

J. Klein, D. Fink, R. Middleton, University of Pennsylvania

Geochimica et Cosmochimica Acta 55 (1991) 2699-2703

A new method of dating the surface exposure of rocks from in situ production of 10Be and 26A1 has been applied to determine the age of Meteor Crater, Arizona. A lower bound on the crater age of 49,200 +- 1,700 years has been obtained by this method.