There are 4 matches

Collection Authorizer Collection name Reference
23791S. Holland Sardeson Collection, Grand Detour Formation, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Catalani (1987)
23792S. Holland Sardeson Collection, Nachusa Formation, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Catalani (1987)
23794S. Holland Sardeson Collection, Quimbys Mill Formation, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Catalani (1987)
23795S. Holland Sardeson Collection, Spechts Ferry Formation, Illinois and Iowa Blackriveran/Rocklandian - Ordovician 4 - Illinois, Iowa Catalani (1987)

Do another search