Abstract
LeCompte et al. (1) reported abundant magnetic microspherules from three Younger Dryas Boundary (YDB) sites, which they concluded are consistent with those interpreted by Firestone et al. (2) as markers of extraterrestrial impacts or airbursts. LeCompte et al. argued that the negative results of Surovell et al. (3)—who did not observe microspherules—must have been because of a deviation from an analytical protocol of A. West that is required to observe them. A. West developed and refined various protocols that enabled him to prepare samples in which putative impact markers have been reported. Samples collected by others have failed to reproduce his findings.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
