Orth

1986 EL. Discovered 1986 Mar. 7 by C. S. Shoemaker and E. M. Shoemaker at Palomar.

Named for Charles J. Orth, nuclear chemist at the Los Alamos National Laboratory, New Mexico. Renowned for his precise analyses for elements by neutron activation methods, Orth has engaged in a world-wide search for evidence of impact of extraterrestrial bodies with the earth at the times of mass extinction of species. He discovered noble metal anomalies at the Cretaceous-Tertiary boundary in continental sedimentary deposits of North America and also near the Frasnian-Fammenian boundary in the Upper Devonian and the Cenomanian-Turonian boundary in the Upper Cretaceous. (M 17658)

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