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
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