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From
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To
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Geolocation
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Author - title
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Year
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| details | Early Pliocene | Wyoming | Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains | 1972 | |
| details | Middle Pliocene | Wyoming | Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains | 1972 | |
| details | Quaternary | Wyoming | Santucci,V.L. The Yellowstone Paleontological Survey. | 1998 |