Ammonite (Asteroceras stellare)
Bob Campbell Geology Museum 200 million years old; Formation: Frodingham Ironstone; Donated: H. Abercrombie.
Ammonite (Trilacinoceras humanese)
Bob Campbell Geology Museum 450 million years old; Formation: La et Tsi; Donated: H. Abercrombie.
Ammonite (Mortaniceras equidistans)
Bob Campbell Geology Museum 100 million years old; Formation: Duck Creek Limestone; Donated: Mr. and Mrs. Alvin Gosnell.
Nautiloid (Eutrephoceras dekayi)
Bob Campbell Geology Museum 70 million years old; Formation: Pierre Shale.
Ammonite (Rhaeboceras sp.)
Bob Campbell Geology Museum 69 million years old; Formation: Bearpaw Shale.
Cardioceras sp., frags. of two steinkerns and partial impression
Bob Campbell Geology Museum Formation: Sundance.
Ammonite (Desmoceras sp.)
Bob Campbell Geology Museum 110 million years old; Donated: H. Abercrombie.
Ammonite (Eopachydiscus marcianus)
Bob Campbell Geology Museum 100 million years old; Formation: Duck Creek Limestone; Donated: Mr. and Mrs. Alvin Gosnell.
Ammonite (Alligaticeras sp.)
Bob Campbell Geology Museum 180 million years old; Donated: H. Abercrombie.
Ammonite (Placenticeras sp.)
Bob Campbell Geology Museum 70 million years old; Formation: Bearpaw Shale.
Ammonite (Didymoceras sp.)
Bob Campbell Geology Museum 73 million years old; Formation: Pierre Shale.