Brule Formation Fossils
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| Rhinoceros jaw, Subhyracodon occidentalis, Brule Fm., Stark Co., width 256 mm. | Turtle skull, Trionyx, Brule Fm., Stark Co., width 108 mm. North Dakota Heritage Center |
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| North Dakota Geological Survey | Prehistoric Life of North Dakota |
| Page Modified September 26, 2006 |