Miocene Sand Dollar Fossil
Millard H Sharp
Biologist With Miocene Fossils
Inga Spence
Miocene Fossils
Inga Spence
Miocene Sand Dollar Fossil #3
Millard H. Sharp
Fossilized Shark Tooth #1
Scott Camazine
Prehistoric, Miocene Landscape #1
Science Source
Prehistoric, Miocene Landscape
Science Source
Three Toed Transitional Horse
Millard H. Sharp
Late Tertiary Landscape
Chase Studio
Platybelodon Skull
Millard H. Sharp
False Saber Tooth Cat #2
Millard H. Sharp
False Saber Tooth Cat #3
Millard H. Sharp
Camel Llama Jaw And Teeth Fossil
Millard H. Sharp
Saber-toothed Cats
Photo Researchers
Fossil Poplar Leaf
Theodore Clutter
Three Toed Horse Fossil
Millard H. Sharp
Fossil Site In Kenya
Gregory G. Dimijian, M.D.
Fossilized Shark Tooth
Scott Camazine
American Mastodon
Millard H. Sharp
Three Toed Transitional Horse #1
Millard H. Sharp
Petrified Wood #2
Mark Windom
Fossil Maple Leaf
Theodore Clutter
Fossil Scallops
Earl Scott
Megatherium, Extinct Ground Sloth
Science Source
Megatherium, Extinct Ground Sloth #3
Science Source
Fossilized Shark Tooth #3
Scott Camazine
Terror Bird Fossil
Millard H. Sharp
Prehistoric Rhinoceros Skull Fossil
Millard H. Sharp
Fossil Beech Leaf
Theodore Clutter
Megatherium, Extinct Ground Sloth #2
Science Source
Welded Tuff
William H. Mullins
Prehistoric Primate Skull
Harry Taylor / Dorling Kindersley / Natural History Museum, London
Jeffersons Ground Sloth
Roger Hall
Sunfish Fossil
Theodore Clutter
Fossil Heather Flowers
Theodore Clutter
Fossil Sweetgum Leaf
Theodore Clutter
Petrified Wood, Close #10
Mark Windom
Titanotherium, Cenozoic Mammal
Science Source
Balanced Rock, Idaho
William H. Mullins
Balanced Rock, Idaho #1
William H. Mullins
Beaked Dolphin
Millard H. Sharp
Megatherium Extinct Ground Sloth #4
Science Source
Table Of Stratified Rocks, 1888
Science Source
Natural Jetty Formed By Igneous Rock
G. R. Roberts
Tertiary Period, Illustration
Spencer Sutton
Fossilized Shark Tooth #2
Scott Camazine
Ants In Amber
Gary Retherford
Florida Oreodont
Millard H. Sharp
Petrified Wood #3
Mark Windom
Miocene Sand Dollar Fossil #2
Millard H. Sharp