The Mesozoic EraWhen dinosaurs ruled the earth

Presented by: Sana Ahmed Roll no. 22

• Began approximately 245 million years ago

• Subdivided into 3 periods

• Ended about 66 million years ago with a major mass extinction

Mesozoic Reptiles Alligator

Lizard

Pterosaurs

Ichthyosaurus

Dinosaurs

Crocodile

Triassic Period245 - 206 million years ago

• Immediately after the Permian Mass Extinction

• Lots of new area is open for animals to live

• Reptiles are really successful here

• Triassic climate is relatively cool

Triassic Fauna

• Earliest dinosaurs

Eoraptor

Pisanosaurus

Lesothosaurus

Triassic Flora

• Mosses, scale trees, ginkgo trees etc

Mosses

Ginkgo trees

Scale trees (palm trees etc)

The Jurassic Period206 - 144 Million Years Ago

• Continents were still together forming Pangaea but they were starting to drift apart.

• The minor extinction at the end of the Triassic Period made dinosaurs abundant during this time.

• The climate here was very hot and dry

Jurassic Fauna

Ankylosaurus

Triceratops

Ichthyosaurus

Pterosaurs

Jurassic Flora

• Lush forest developed

• Conifers dominated

The Cretaceous Period144 - 66 million years ago

• The last period when Dinosaurs lived

• Ends with a mass extinction around 66 million years ago

• First flowering plant appeared

Cretaceous Flora

Cretaceous fauna

Became extinct

• Marine animals• Dinosaurs• Pterosaurs• Ichthyosaurus

Survived

• Many birds• Fish, squid, sharks• Many reptiles• Some mammals

Summary

Mesozoic era

• Witnesses gradual rifting of Pangaea

• Climate varied from hot and humid to cold one

• Evolution, dominance and extinction of non-avian dinosaurs

• Appearance of first bird

• Appearance of mammals