A great place to start learning about fossils is right in your "backyard", with your official state fossil. This page lists all of the designated state fossils (and some official state dinosaurs and fossiliferous gem stones) as a launching point for learning about fossils in your state and neighboring states.
Do you know your official state fossil?
Basilosaurus cetoides (Eocene age, whale)
Mammuthus primigenius (Pleistocene age, woolly mammoth)
Araucarioxylon arizonicum (Triassic age, wood)
Smilodon californicus (Pleistocene age, sabertooth cat)
Stegosaurus stenops (Jurassic age, plated dinosaur)
Eubrontes giganteus (Jurassic age, dinosaur track)
Belemnitella americana (Cretaceous age, belemnite)
Official state stone:
Proposed state fossil (unofficial)
"Sea Biscuit", Eupatagus antillarum (Eocene age, )
Equus simplicidens (Pliocene age, horse)
Tullimonstrum gregarium (Pennsylvanian age, soft-bodied animal — "Tully Monster")
brachiopod (Ordovician - Mississippian age, shellfish)
petrified palm wood (Oligocene age, palm)
Pertica quadrifaria (Devonian age, plant)
dinosaur tracks (Jurassic age, trace fossil — tracks)
Maiasaura peeblesorum (Cretaceous age, duckbilled dinosaur)
Shonisaurus popularis (Triassic age, ichthyosaur)
Hadrosaurus foulkii (Cretaceous age, duckbilled dinosaur)
Coelophysis bauri (Triassic age, theropod dinosaur)
Eurypterus remipes (Silurian age, sea scorpion)
Teredo petrified wood (Paleocene age, shipworm-bored wood)
The State Invertebrate Fossil—Isotelus (Ordovician age, trilobite)
The large trilobite genus Isotelus, occurs in rocks exposed in southwestern Ohio.
The Fossil Fish of Ohio—Dunkleosteus terrelli (Devonian age)
At an estimated length of up to 8.8 meters (29 feet), the fearsome Dunkleosteus terrelli was part of a now extinct class of armored fish called placoderms. It was an apex predator during the latter part of the Devonian Period, also known as the Age of Fish, about 360 million years ago.
To learn more about Dunkleosteus terrelli and other prominent Ohio fossils, visit the ODNR Division of Geological Survey website at Fossils in Ohio (ohiodnr.gov).
Saurophaganax maximus (Jurassic age, theropod dinosaur)
Metasequoia (Miocene age, conifer leaf)
Phacops rana (Devonian age, trilobite)
Triceratops (Cretaceous age, horned dinosaur)
Pterotrigonia thoracica (Cretaceous age, bivalve)
Allosaurus (Jurassic age, theropod dinosaur)
Delphinapterus leucas (Pleistocene age, white beluga whale)
Chesapecten jeffersonius (Miocene - Pliocene age, bivalve)
"Capitalsaurus" (Cretaceous age, undetermined theropod dinosaur)
Last updated: August 8, 2023