title: An extraterrestrial impact at the Permian-Triassic boundary?
authors.affiliation: Division of Geological and, Planetary Sciences, MS 170-25, California Institute of Technology, Pasadena, CA 91125, USA. farley@gps.caltech.edu
authors.forename: K A
authors.initials: KA
authors.lastname: Farley
authors.forename: S
authors.initials: S
authors.lastname: Mukhopadhyay
mesh_terms: D001128:Argon / Q000032:analysis; D002244:Carbon / Q000032:analysis*; D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D006371:Helium / Q000032:analysis*; D007554:Isotopes; D019110:Meteoroids; D010163:Paleontology
chemical_list: D007554:Isotopes; D006371:Helium; D001128:Argon; D002244:Carbon