The Jurassic Period Essay

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The Jurassic Period took place about 210 million years ago. It went on for

about 70 million years. The Jurassic Period was one of periods in the Mesozoic


The life forms that were present during the Jurassic Period were not all of

the life forms in Jurassic Park. The Tyrannosaurus rex and Tricerastops had not

evolved until after the Jurassic Period. During the Jurassic Period the largest land

animals of all were around. These giant animals were known as sauropods. The

Diplodocus, the Brachiosaurus, and the Apatosaurus were all saouropods that were

around during the Jurassic Period. There were also some rodents, no larger than

rats, that roamed in the foliage, and were a number of the early mammals. They

all were herbivorous and ate the lush vegetation that grew in their surroundings.

Other herbivorous were the stegosaurus that had plates on its back that were used

as protection from carnivores. The predators during the Jurassic Period were small

but horrifying carnosaurs, like Allosaurus, and Dilophosaurus. The fast

coelurosaurs were deadly but tiny. They traveled in packs and scavenged. The

Jurassic also had some of the first birds. The Archaeopteryx was supposedly a

coelurosaurian ancestor.

The sea was also full of life. Some of the ocean life consisted of the

ichthyosaurs, plesiosaurs, and crocodiles that were much larger than they are

today. There were also were modern looking sharks and Rays that were the same

size and had similar characteristics. Also there were larger squids, octopus, and

nautilus of the present. Ammonites with their coiled external shells were also some

of the life in the sea during the Jurassic Period. dinoflagellates and

coccolithophorids were microscopic single celled organisms that lived in the


The Jurassic Period also had an abundant source of vegetation. The floras

were different than they are today. In the Jurassic Period many plants grew that

arent around today. Ferns, ginkgoes, bennettitaleans, and the real cicadas grew in

the Jurassic Period. Some conifers were also around, including the relatives of

living redwoods, cypresses, pines, and yews. Even though dinosaurs were drawn

with palm trees or any other flowering plants. It doesnt mean that they were

around, because most of them were not around and are not the same as the ones


The life of the Jurassic Period affected us today by producing our oil we

use. Some of the organisms that died 200 million years ago during the Jurassic

Period had converted into oil, that we use to fuel our cars and machinery. When

the creatures died 200 million years ago they were decomposed and after a while

were deep in the ground where they ended up changing chemically. Under the

pressure there bones and fossils were turned into oil. We learned how to pump this

oil out of the ground and make it useful by burning it.

Burning the oil can create pollution. When we burn the oil it lets off gases

that create smog. The smog then can trap in sunlight rays that are suppose to

bounce of the Earth into outer space. It then can create the Greenhouse Effect.

Which can melt the polar ice caps and cause another Ice Age.


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