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National Museum of Natural History: Paleobiology: Green River Fossil Collections

Curated by ACT
This National Museum of Natural History: Paleobiology: Green River Fossil Collections graphic also includes:

Search the collection of 35,000 fossiliferous rocks found within the Green River Formation of Colorado and Utah. View some of these 50 million year old insect fossils in a linked slide show.

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Classroom Considerations
  • Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)