This presentation give a brief overview of mesozoic era; its dominant and extincted animals, its plantation and climate.

1. The Mesozoic Era
When dinosaurs ruled the earth
Presented by: Sana Ahmed
Roll no. 22

2. • Began approximately 245 million years
ago
• Subdivided into 3 periods
• Ended about 66 million years ago with a
major mass extinction

3. Mesozoic Reptiles
Alligator
Lizard

4. rs
rosau
Pte
Ichthyosau
Dinosaurs
Crocodile
rus

5. Triassic Period
245 - 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

6. Triassic Fauna
• Earliest dinosaurs
Eoraptor

7. Lesothosaurus
Pisanosaurus

8. Triassic Flora
• Mosses, scale trees, ginkgo trees etc
Mosses

9. Scale trees (palm trees etc)
Ginkgo trees

10. The Jurassic Period
206 - 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

11. Jurassic Fauna

12. Ankylosaurus

13. Triceratops
Pterosaurs
Ichthyosaurus

14. Jurassic Flora
• Lush forest developed
• Conifers dominated

15. The Cretaceous Period
144 - 66 million years ago
• The last period when Dinosaurs lived
• Ends with a mass extinction around 66
million years ago
• First flowering plant appeared

16. Cretaceous Flora

17. Cretaceous fauna
Survived
Became extinct
•
•
•
•
Marine animals
Dinosaurs
Pterosaurs
Ichthyosaurus
•
•
•
•
Many birds
Fish, squid, sharks
Many reptiles
Some mammals

18. 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