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D2 Synorogenic Strata-Dawson Arkose
This layer contains several hundred feet of coarse gravel and sandstone
layers derived from the uplifted Rocky Mountains. Environments resembled
debris fans east of the modern Andes Mountains in South America. These
sediments were deposited in the Eocene Epoch (55-50 m.y.a). Typical
fossils include petrified wood, leaves, and rare mammal teeth.
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