Oviraptor eggs, late Cretaceous, Mongolia, China |
Precursor to the horse, Protorohippus venticolus, from the Fossil Butte Member of the Eocene, Green River Formation, WY |
Bass, Priscacara liops, Eocene Green River Formation, Kemmerer, WY |
Keichousauris hui, late Triassic, Guanling Fm., Xingiji, Guizhou, China |
Herring, Knightia alta, Eocene Green River Formation, Kemmerer, WY |
Fossil Sting Ray, Asterotrygon maloneyi, Fossil Butte Member of the Eocene Green River Formation, WY |
Fossil fish and palm fronds, Fossil Butte Member of the Eocene Green River Formation, Fossil, WY |
Fossilized skull of a Mosasaur, a marine reptile of the Cretaceous Period, from Morocco. |
Trilobite: Paradoxides, Cambrian, Anti-Atlas Mountains, Morocco |
Trilobites in a mating assemblage: Homotelis bromidensis, Ordovician Bromide Formation, Carter County, OK |
Trilobites: Phacops rana, Devonian Silica Shale, Sylvania, OH |
Ammonite replaced by pyrite |
Trilobite: Elrathia kingii, Cambrian Wheeler Shale, Millard County, UT |
Crinoid, Mississippian, Montgomery County, IN |
Conophyton Stromatolite structures in Precambrian Helena Formation, Glacier National Park, MT |
Ammonite, Madagascar |
Trilobite: Asaphus cornutus, Ordovician, St. Petersburg, Russia |
Ammonite assemblage, Lower Jurassic, North Yorkshire, U.K. |
Trilobites: Asphus punctata, cast and mold, middle Ordovician, St. Petersburg, Russia |
Cross section of an ammonite, Madascar |
Dragonfly, Carduluganphus tuberculatus, Crato Fm., lower Cretaceous, Ceara, Brazil |
Shrimp, Solenhoffen Limestone, Jurassic, Germany |
Ammonite |
Trilobite: Thysanopeltis speciosa, middle Devonian, Zerg, Morocco |
Opalized Ammonite, |
Devonian Trilobite, Phacops rana, Silica shale, Sylvania, Ohio |
Selenopeltis, Ordovician Trilobite |