Abstract Ammonites are listed from 25 beds of limestone and calcareous shale in the Upper Cretaceous Bridge Creek Member. Brief descriptions and faunal content are given for 14 distinctive beds of limestone. The lowest fourth of the member is late Cenomanian in age, the highest fourth is middle Turonian in age, and the rest is early Turonian. The greatest diversity of ammonites (9 species) occurs in one of the limestone beds of early Turonian age.