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about fossils found in this

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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 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 three-quarters belong to the

meat-eater Allosaurus. This predator has sharp claws, strong jaws and

sharp teeth.

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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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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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.

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

UtahraptorSkullClaw

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.

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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

Crinoid StemsHorn Coral

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.

Sea Fossils

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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.

PETRIFIED WOOD

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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!

HUNTINGTON MAMMOTH

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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.

Stegosaurus

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The Diabloceratops was discovered in Southern Utah near the Last Chance stream in 2006. It is a

dinosaur with long nose horns and short spiny frills, related to the well-known Triceratops. It lived during the Campanian Stage (about 70 - 83

million years ago).

Diabloceratops“Last Chance” Ceratops

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Lush forests and a huge freshwater lake covered part of Utah during the

early Tertiary Period (about 50 million years ago). Plant fossils can

be found throughout central and northern Utah in sedimentary rocks

of this age.

Plant Fossils