Where are they?
(PUSH ENTER)
Click on a star to
find information
about fossils
found in this
area.
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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Allosaurus
Of the bones taken out of
Cleveland-Lloyd Dinosaur
Quarry, about threequarters belong to the
meat-eater Allosaurus.
This predator has sharp
claws, strong jaws and
sharp teeth.
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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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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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Allosaurus
This predator has sharp claws, strong jaws and
sharp teeth. It is from the late Jurassic period.
The ALLOSAURUS is Utah’s 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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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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Utahraptor
Claw
Claw
UTAHRAPTOR was discovered in 1991 by Dr.
Jim Kirkland in a desert near Moab, Utah. It
was a meat-eater and used its large, razorsharp 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.
Utahraptor
Skull
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SABER TOOTHED CAT
The SABER-TOOTHED CAT fossil
was found near Park City. It is an
extinct ice age animal.
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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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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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Crinoid
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.
Crinoid Stems
Brachiopod
Horn Coral
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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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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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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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