There are 28 matches

Collection Authorizer Collection name Reference
23116S. Holland Guttenberg Formation, Iowa and Wisconsin Rocklandian - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23117S. Holland Spechts Ferry Formation, Iowa and Wisconsin Rocklandian - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23118S. Holland Quimbys Mill Formation, Iowa and Wisconsin Blackriveran - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23119S. Holland Grand Detour Formation, Iowa and Wisconsin Blackriveran - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23120S. Holland Mifflin Formation, Iowa and Wisconsin Blackriveran - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23121S. Holland Pecatonica Formation, Iowa and Wisconsin Blackriveran - Ordovician 4 - Iowa/Wisconsin DeMott (1987)
23789S. Holland Sardeson Collection, Pecatonica Formation, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Catalani (1987)
23790S. Holland Sardeson Collection, Mifflin Formation, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Catalani (1987)
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)
23796S. Holland Sardeson Collection, Guttenberg Formation, Illinois and Iowa Rocklandian/Kirkfieldian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23797S. Holland Sardeson Collection, Ion Formation, Buckhorn Member, Illinois and Iowa Kirkfieldian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23798S. Holland Sardeson Collection, Ion Formation, St. James Member, Illinois and Iowa Kirkfieldian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23799S. Holland Sardeson Collection, Dunleith Formation, Beecher Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23800S. Holland Sardeson Collection, Dunleith Formation, Eagle Point Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23801S. Holland Sardeson Collection, Dunleith Formation, Fairplay Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23803S. Holland Sardeson Collection, Dunleith Formation, Rivoli Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23804S. Holland Sardeson Collection, Dunleith Formation, Sherwood Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23805S. Holland Sardeson Collection, Dunleith Formation, Wall Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23806S. Holland Sardeson Collection, Dunleith Formation, Wyota Member, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23807S. Holland Sardeson Collection, Wise Lake Formation, Sinsinawa Member, Illinois and Iowa Edenian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23808S. Holland Sardeson Collection, Wise Lake Formation, Rifle Hill Member, Illinois and Iowa Edenian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23809S. Holland Sardeson Collection, Dubuque Formation, Illinois, Iowa Edenian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23810S. Holland Sardeson Collection, Scales Shale, Elgin Member, Illinois and Iowa Edenian/Maysvillian - Ordovician 4 - Illinois, Iowa Catalani (1987)
23811S. Holland Sardeson Collection, Scales Shale, Clermont Member, Illinois and Iowa Maysvillian - Ordovician 4 - Illinois, Iowa Catalani (1987)
26683M. Foote Thaerodonta recedens-Iowacystis sagittaria Comm., Elgin Member, Maquoketa Fm. Maysvillian - Ordovician 4 - Iowa Frest et al. (1999)

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