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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

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The mesozoic era

The Mesozoic Era


By: Mr. Litaker

The mesozoic era

The Age of

The Dinosaurs

The mesozoic era

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

one even imagined

such animals existed.



  • Before there were any people there were dinosaurs.

  • Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era the “Age of the Reptiles”

The mesozoic era

Mesozoic Era

  • The Mesozoic Era began about 245 mya and ended 66 mya

  • The were 3 Periods including

    • - Triassic Jurassic Cretaceous

  • At the beginning of the Mesozoic, Pangaea had formed

  • Breakup of Pangaea, a major geologic event, began in the late TRIASSIC and continued thru the CRETACEOUS.

  • Tethys Sea was a shallow embayment that separated India and Asia.

The mesozoic era

  • The name dinosaur comes from the term Dinosauria, which means terrible lizards.

The mesozoic era

  • Dinosaur is the name of a group of prehistoric reptiles that ruled the earth about 160 million years ago.

  • These animals died out millions of years ago, but they have fascinated people ever since they were first described in the early 1800’s.

The mesozoic era

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.

The mesozoic era

The mesozoic era

Brachiosaurus is one of the better known sauropods

The mesozoic era

The mesozoic era

Kinds of dinosaurs

Kinds of Dinosaurs



Do you know

what the

Utah State

Fossil is?

Big al

Big Al

  • Nickname: Different Lizard

  • Age: 160-145 million years ago during the late Jurassic Period

  • Size: 35-40 feet long (as long as two big Python snakes!)

  • Weight: Anywhere from 2 tons to over 5 tons

  • Characteristics: Sharp claws up to 6 inches long. Teeth up to almost 4 inches long

  • Special Talents: Super smart compared to other dinosaurs. Extremely fierce. Known to attack other dinos twice his size.

The mesozoic era

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.

Where dinosaurs lived

Where Dinosaurs Lived

  • See the world as it looked during

  • the Jurassic Period!

The mesozoic era

  • The Jurassic climate was warm

  • The Air was damp, like a tropical forest



  • Paleontology (PAY lee ahn TAHL uh jee), is the study of animals, plants, and other organisms that lived in prehistoric times (more than 5,500 years ago). Fossil remains of organisms occur in layers of sedimentary rocks (rocks formed when mineral matter settled out of air, ice, or water). The organisms that are now fossils were alive when the rocks were being formed. They were buried and preserved as the layers of rock piled up.

So what do you think a paleontologist is

So what do you thinka Paleontologist is?

A paleontologist

is a scientist

who studies


learning about

the forms of life

that existed in

former geologic

periods, chiefly by

studying fossils.

The mesozoic era

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.

The mesozoic era

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 mesozoic era

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).



Did they have colors

Did They Have Colors?

  • It is very difficult to figure out how the dinosaurs sounded, how they behaved, or what color they were.

Plant eaters


  • Most dinosaurs were plant-eaters like:

  • Triceratops

  • What do we call plant-eaters?

  • Herbivores

Meat eaters


  • Some were meat-eaters like:

  • T-Rex

  • What do we call meat-eaters?

  • Carnivores

The food chain

The Food Chain

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).

The mesozoic era

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


What is the most likely held theory as to the demise disappearance of the dinosaurs

What is the most likely held theory as to the Demise (Disappearance of) the Dinosaurs?

Well we don t know the real absolute theory of how they became extinct but

Well, we don’t know the real absolute theory of how they became extinct, but----

  • One thing for sure is……….

  • We will have an incredible time going back in time to learn about these marvelous creatures.

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