The Arizona Meteor Crater is the best preserved and also the most studied impact event on the earth. For many years there was lively debate over the origin mechanism, whether volcanic or impact. Other still-lingering questions concern the location and size of the actual meteorite, assuming an impact origin, and the time of the event. Date-of-origin evidence includes dendrochronology, rock erosion, radioactivity, and thermoluminescence. Published results have varied drastically between 800-2,000 years ago for the time of the crater’s formation. This study critiques the various chronology estimates, illustrating the inherent uncertainty of dating techniques.