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Green River fossil plants

Nearly all of these 50-million-year old plant fossils, from the Green River Formation, belong to a group of flowering plants (angiosperms) called dicots.

Some of these plants may look familiar to varieties living today, but their leaf shape relates more so to the climate in which they grew rather than their evolutionary grouping.  

These and other fossils provide evidence that Utah, Wyoming, and Colorado were much warmer and wetter in the Eocene then today.

Canyon Wall
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Green River fossil plants
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