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Sentinal Butte Formation Fossils
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Maidenhair tree leaf, Ginkgo, Sentinel Butte Fm., Morton Co., width 81 mm. |
Petrified tree, ?Metasequoia, Sentinel Butte Fm., Mercer Co., length 6 m. |
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Soft-shelled turtle, Plastomenus, Sentinel Butte Fm., Billings Co., length 535 mm. USFS, North Dakota Heritage Center |
Sycamore leaf, Platanus, Sentinel Butte Fm., Williams Co., width 150 mm. North Dakota Heritage Center |
| Page Modified October 10, 2006 |