The Ordovician in North Dakota, US |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Paleontology and geologyNorth Dakota was dry land during the Early Ordovician, but by the middle of the period, seas had inundated the state. Sands, clays, and |
The Ordovician in North Dakota, US |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Paleontology and geologyNorth Dakota was dry land during the Early Ordovician, but by the middle of the period, seas had inundated the state. Sands, clays, and |