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Mammoths, mastodons, and other proboscideans are among the most familiar fossil organisms. An inventory complied by Jim Mead and others documents the occurrences of these animals in 63 National Park Service units.
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John Day Fossil Beds National Monument in Oregon and the 29-million-year-old Turtle Cove Member animals chosen for the 2025 National Fossil Day art: a late primate, early horses and rhinos, false cats and a small dog.















