The Mesozoic Era. Dinosaurs By: Mr. Litaker. The Age of The Dinosaurs. Millions of years ago , Great beasts called " dinosaurs " thundered over the earth. Yet, up until the last century, when the first dinosaur fossils were discovered, no
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The Mesozoic Era
By: Mr. Litaker
The Age of
Great beasts called
over the earth.
Yet, up until the last
century, when the
first dinosaur fossils
were discovered, no
one even imagined
such animals existed.
The Coelophysis (below), a small meat eater that also walked on three toes and possessed hollow bones much like those found in birds.
The Dilophosaurus (above), a large carnivore that walked on three toes.
Brachiosaurus is one of the better known sauropods
Do you know
The Utah State Fossil:The Allosaurus
The allosaurus was
the State Fossil in 1988. More allosaurus specimens have been found in two of Utah's quarries than any other dinosaur. Sixty individuals, from
juveniles to adults, were found
at one site inUtah.
is a scientist
the forms of life
that existed in
periods, chiefly by
Fossils are the reason we have most of this information. For almost 200 years, paleontologists have been discovering fossils all over the world. They’ve identified more than 330 different kinds of dinosaur fossils. And every year, they find new fossils. These fossils can tell us how big an animal grew, what it ate, even how it died.
Dinosaur National Monument
A stony frieze at one of the continent’s largest
and richest dinosaur quarries holds the bones of
beasts that ruled the Jurassic: stegosaurs,
allosaurs, apatosaurs and many more.
The first dinosaur to be described
scientifically was Megalosaurus
in 1824, by William Buckland.
Buckland (1784-1856) was a
British fossil hunter and
clergyman who discovered
some Megalosaurus fossils in
1819 and named the reptile
in 1824. It was the first dinosaur
ever described scientifically and
first theropod dinosaur discovered
(this is all in hindsight, because the dinosaurs had not yet been recognized as a separate taxonomic group - the word dinosaur hadn't even been invented yet).
Meat-eating animals (carnivores like Tyrannosaurus rex)
get their energy by eating other animals, mostly plant-eating
animals (herbivores like Triceratops). The herbivores
get their energy by eating plants (like cycads).
Where Did Everybody Go?
You may have
noticed that there
are no dinosaurs
around these days.
In fact, there haven't
been any around for
about 66 million