There are 5 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 26172 | S. Holland | Lake Simcoe Area, Ontario, Gull River Formation Lower Member Blackriveran - Ordovician 4-5 - Canada | Liberty (1969) |
| 27216 | S. Holland | Ottawa Valley Region, Ontario, Ottawa Formation Blackriveran - Ordovician 4-5 - Canada | Bolton (1988) |
| 27218 | S. Holland | Ottawa Valley Region, Ontario, Ottawa Formation, Braeside beds Ordovician - Ordovician 1-5 - Canada | Bolton (1988) |
| 27219 | S. Holland | Ottawa Valley, Ontario, Ottawa Formation, Pamelia beds Chazyan/Blackriveran - Ordovician 2-4-4-5 - Canada | Bolton (1988) |
| 27220 | S. Holland | West of Lake Simcoe, Ontario, Gull River Formation lower member Chazyan/Blackriveran - Ordovician 2-4-4-5 - Canada | Bolton (1988) |