There are 25 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23750 | S. Holland | St. Peter Sandstone Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23751 | S. Holland | Glenwood Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23752 | S. Holland | Pecatonica Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23753 | S. Holland | Mifflin Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23756 | S. Holland | Grand Detour Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23757 | S. Holland | Nachusa Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23758 | S. Holland | Quimbys Mill Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23761 | S. Holland | Spechts Ferry Formation Cephalopods, Illinois, Iowa, Wisconsin Blackriveran/Rocklandian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23762 | S. Holland | Guttenberg Formation Cephalopods, Illinois, Iowa, Wisconsin Rocklandian/Kirkfieldian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23766 | S. Holland | Ion Formation, Buckhorn Member Cephalopods, Illinois, Iowa, Wisconsin Kirkfieldian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23769 | S. Holland | Dunleith Formation, Eagle Point Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23770 | S. Holland | Dunleith Formation, Fairplay Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23771 | S. Holland | Dunleith Formation, Mortimer Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23773 | S. Holland | Dunleith Formation, Rivoli Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23775 | S. Holland | Dunleith Formation, Sherwood Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23776 | S. Holland | Dunleith Formation, Wall Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23777 | S. Holland | Dunleith Formation, Wyota Member Cephalopods, Illinois, Iowa, Wisconsin Shermanian - Ordovician 4-5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23778 | S. Holland | Wise Lake Formation, Sinsinawa Member Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23779 | S. Holland | Wise Lake Formation, Rifle Hill Member Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23780 | S. Holland | Dubuque Formation Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23783 | S. Holland | Scales Shale, Elgin Member Cephalopods, Illinois, Iowa, Wisconsin Edenian/Maysvillian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23784 | S. Holland | Scales Shale, Clermont Member Cephalopods, Illinois, Iowa, Wisconsin Maysvillian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23785 | S. Holland | Fort Atkinson Limestone Cephalopods, Illinois, Iowa, Wisconsin Maysvillian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 24169 | S. Holland | Stewartville Dolomite Cephalopods, Iowa and Minnesota Late Ordovician - Ordovician 4-5 - Iowa, Minnesota | Miller et al. (1954) |
| 24170 | S. Holland | Maquoketa Formation Cephalopods, Iowa Edenian - Ordovician 5 - Iowa | Miller et al. (1954) |