Green River Fossils
Discover why Green River fossils are so special, and check out amazing specimens of extinct species that reveal what Wyoming looked like 52 million years ago!
Courtesy of Lance Grande, Illustration by M. Donnelly
Green River Lake System
© The Field Museum, GEO86416_127d, J. Weinstein
Green River Fossils
Courtesy of Lance Grande
Lake and Land Life
Courtesy of Lance Grande
States of Decay
© The Field Museum, GEO86452_08d, J. Weinstein
Fan Palm & Fish
© The Field Museum, GEO86416_045d, D. Scher
Fossilized Flower
© The Field Museum, GEO86416_063d, J. Weinstein
Lotus Leaf
© The Field Museum, GEO86697_02d, J. Weinstein
Leaf with Infestation
© The Field Museum, GEO86416_023d, D. Scher
Damselfly
Courtesy of Lance Grande
Crab Spider
© The Field Museum, GEO86416_051d, D. Scher
Frog
© The Field Museum, GEO86416_094d, D. Scher
Iguana Lizard
© The Field Museum, geo85506c, J. Weinstein
Primitive Crocodile
© The Field Museum, GEO86416_109d, D. Scher
Food Chain
Courtesy of Lance Grande
Pregnant Stingray
Courtesy of Lance Grande
Mass Mortality
© The Field Museum, GEO86416_072d, D. Scher
Perching Songbird
Courtesy of Lance Grande
Primitive Parrot
© The Field Museum, GEO86416_106d, D. Scher
Early Bat
© The Field Museum, GEO86416_123d, D. Scher
Carnivorous Mammal
