title: Inconsistent redefining of the carbon spherule "impact" proxy.
authors: Mark
authors: M
authors: Hardiman
authors: Andrew C
authors: AC
authors: Scott
authors: Margaret E
authors: ME
authors: Collinson
authors: R Scott
authors: RS
authors: Anderson
mesh_terms: D019015:Geologic Sediments / Q000737:chemistry*; D005844:Geology; D019110:Meteoroids; D008962:Models, Theoretical