P R E H IS T O R E C DINOSAURS OF THE JURASSIC by David West Smart Apple Media
A UR ASIA Equators THYS SEA SEA India WVANA Antarcti 200 mya 170 mya 175 200 Millions of years ago mya EARLY JURASSIC MIDDLE 200 mya Earth is recovering 190 mya Hot dry weather from Triassic Jurassic dominates the land Dinosaurs start to diversify into many varieties extinction event The Jurassic Period The start of the period is marked by the major Triassic Jurassic extinction event During the early Jurassic period the supercontinent Pangaea broke up into the northern continent Laurasia and the Southern continent Gondwana Climates were warm and no land was near either pole The climate changed from dry to humid and many of the arid deserts of the Triassic were replaced by rainforests Conifers dominated the flora and made up the majority of large trees Cycads ginkgos and tree ferns were also common in the
AURASTA sia TER Equator CONDWA SEA STE ONDwAD Antarctica 150 mya 120 miya 161 145 JURASSIC LATE JURASSIC Massive climate change resulting in heavy rains that create tropical lush rainforests Giant plant eating sauropods such as Brachiosaurus and Diplodocus rapidly increased in numbers Cryolophosaurus lived in what is today Antarctica LIFE DURING THE JURASSIC After the Triassic Jurassic extinction event the dinosaurs took over from the dinosauromorph and crocodilomorph archosaurs as the dominant animal group The first birds evolved from a branch of theropod dinosaurs The seas and oceans were inhabited by marine reptiles such as ichthyosaurs and plesiosaurs The pterosaurs dominated the
