Where are they

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Fossils in Utah

• Where are they?

(PUSH ENTER)
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Click on a star to find information about fossils
found in this area.
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Millard County
TRILOBITES
Trilobites are extinct marine (water) animals
that existed 550 million to around 300 million
years ago in the seas that once covered Utah.
They are related to crustaceans of today such as
crabs and lobsters. There are many kinds of
trilobites found all over the world. Trilobites
were easily fossilized because as they died,
their bodies settled to the sea bottom where they
were covered by layer after layer of new soil.
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Emery County
Allosaurus
Of the bones taken out of Cleveland-Lloyd
Dinosaur Quarry, about three-quarters belong to
the meat-eater Allosaurus. This predator has
sharp claws, strong jaws and sharp teeth.
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Emery County
Stegosaurus
The STEGOSAURUS was a dinosaur from the Jurassic
period (about 200 million years ago). You can
recognize it by the bony plates that run down the
neck and back. It had a small head with a
walnut-sized brain (the same as a kitten)! The
stegosaurus was a plant eater. The bones of the
Stegosaurus are found throughout the
Cleveland-Lloyd quarry, but especially in
"Stegosaurus Corner" where four skeletons were
discovered.
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Emery County
Camarasaurus
CAMARASAURUS means "chambered lizard" because of
the hollow chambers in its backbones. This made
it lighter, so the Camarasaurus could move
easily. These plant-eaters grew larger than the
quarry building.
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Uintah County
Allosaurus
This predator has sharp claws, strong jaws and
sharp teeth. It is from the late Jurassic period.
The ALLOSAURUS is Utahs State Fossil.
Marshosaurus
Marshosaurus is small, rare theropod (beast
footed). It is a carnivore that reached lengths
up to 16 feet and was named after O.C. Marsh, a
famous paleontologist from the 1800s.
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Uintah County
Camarasaurus
CAMARASAURUS means "chambered lizard" because of
the hollow chambers in its backbones. This made
it lighter, so the Camarasaurus could move
easily. These dinosaurs reached lengths of 50
feet! Camarasaurus walked on all fours, but could
rear up on its hind legs to reach high trees to
feed with its strong, spoon shaped teeth.
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Grand County
Utahraptor
UTAHRAPTOR was discovered in 1991 by Dr. Jim
Kirkland in a desert near Moab, Utah. It was a
meat-eater and used its large, razor-sharp claws
to cut into its prey. Its build shows it was a
speedy predator, and evidence suggests that it
was pack hunter. Like other meat-eating
dinosaurs, raptors walked on two legs.
Claw
Utahraptor Skull
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Claw
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Summit County
SABER TOOTHED CAT
The SABER-TOOTHED CAT fossil was found near Park
City. It is an extinct ice age animal.
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Iron County
OYSTERS
A shallow sea entered this area from the east
about 190-160 million years ago. There are
several layers of limestone here made almost
entirely of shells and shell pieces.
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Box Elder County
TRILOBITES
Trilobites are extinct marine (water) animals
that existed 550 million to around 300 million
years ago in the seas that once covered Utah.
They are related to crustaceans of today such as
crabs and lobsters. There are many different
kinds of trilobites found all over the world.
Trilobites were easily fossilized because as they
died their bodies settled to the sea bottom where
they were covered by layer after layer of new
soil deposits.
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Tooele County
Crinoid
Brachiopod
About 350 million years ago, warm shallow seas
rich with life covered most of Utah. West of Salt
Lake in Tooele County, fossils of crinoids or sea
lilies, two-valved seashells (brachiopods) and
coral are found.
Horn Coral
Crinoid Stems
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Wayne County
PETRIFIED WOOD
PETRIFIED WOOD and agate have been found by
Capitol Reef National Park. Petrified wood is a
fossil in which the organic material has been
replaced by minerals during the fossilization
process.
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Sanpete County
HUNTINGTON MAMMOTH
The HUNTINGTON MAMMOTH was found in 1988 by
people working on a dam. It is an ice age animal.
The skeleton was 90 complete. The Huntington
mammoth lived about 10,500 years ago. Tooth wear
and arthritis in its bones tells us it was a very
old mammoth. Scientists could tell what its last
meal was!
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Garfield County
Stegosaurus
The stegosaurus was a dinosaur from the Jurassic
period (about 195 million years ago) and has been
found in several places in Utah. You can
recognize it by the bony plates that run down the
neck and back. It had a small head with a
walnut-sized brain (the same as a kitten)! The
stegosaurus was a plant eater.
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