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Sentinal Butte Formation Fossils
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Angiosperm samara, "Acer", Sentinel Butte Fm., Morton Co., length 41 mm. |
Horse chestnut leaf, Aesculus hickeyi, Sentinel Butte Fm., Williams Co., height 195 mm. |
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Bivalves (mussels) and snail (Campeloma), Sentinel Butte Fm., Billings Co., width 63 mm. TRNP |
Flower, Sentinel Butte Fm., Morton Co., width 11 mm. |
| Page Modified October 10, 2006 |