Cooperstown Pierre Shale Site
Corridor of Time Exhibit
Plioplatecarpus
A New Species of Mosasaur Discovered in North Dakota?
Mosasaur were Reptiles, but not dinosaurs
US And Canadian Fossil Sites -- Data for North Dakota
Invertebrate Fossils from the Pierre Shale
Summer Dig Planned for giant sea turtle remains
Pierre Shale
Western Interior Seaway
Lake Agassiz