TY  - RPRT
TI  - 40Ar/39Ar age of the Manson impact structure, Iowa, and correlative impact ejecta in the Crow Creek member of the Pierre Shale (Upper Cretaceous), South Dakota and Nebraska
AU  - G. A. Izett
AU  - W. A. Cobban
AU  - G. B. Dalrymple
AU  - J. D. Obradovich
PY  - 1998
DO  - 10.1130/0016-7606(1998)110<0361:aaaotm>2.3.co;2
UR  - https://pubs.usgs.gov/publication/70021039
ID  - 70021039
ER  -