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The Triassic Period

The Triassic Period. Elizabeth L. A. Deschner Monique P. V. Viens. Time Period . The Triassic period is the first period in the Mesozoic Era followed by the Permian and then the Jurassic period It is a time that occurred from about 251 to 199 million years ago

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The Triassic Period

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  1. The Triassic Period Elizabeth L. A. Deschner Monique P. V. Viens

  2. Time Period • The Triassic period is the first period in the Mesozoic Era followed by the Permian and then the Jurassic period • It is a time that occurred from about 251 to 199 million years ago • Both the start and the end of the Triassic period are marked by major extinction events • The first flying vertebrates made their appearance in this period along with corals from the hexacorallia

  3. Landforms &Continental Position • During Triassic period, Earth’s landmass was concentrated into a supercontinent called Pangea • Remaining shores were surrounded by a world-ocean known as Panthalassa • All the deep-ocean sediments laid down during the Triassic have disappeared through subduction of oceanic plates

  4. Climate + Atmosphere • Generally hot, dry climate • Forms typical red bed sandstones and evaporites • No evidence of glaciations near north or south poles • Highly seasonal: very hot summers and very cold winters

  5. Plants ON LAND PLANTS (dominant) • Lycophytes, cycads,ginkgophyta, and glossopterids • Spermatophytes (seed plants) • In northern hemisphere, conifers flourished • In southern hemisphere, Glossopteris (seed fern) MARINE PLANTS (dominant) • Corals • Reefs

  6. Animals MARINE REPTILES • Sauropterygia • Nauthosaurs • Placodonts • Thalattosauria CARNIVORES • Prestosuchidae • Ornithosuchidae • Poposauridae • Raiusuchidae • HERBIVORES • Aardonyx • Dryosaurus • Gastonia • Jobaria • Minmi

  7. Animal & Plant Extinctions • The largest extinction occurred in this time period -About 95% of all species and about 60% of the genera died out, including many marine animals (like the trilobite) • Possible causes of Permian extinction: -global cooling, volcanic eruptions, or a decrease in the continental shelf area during the formation of Pangea

  8. Major Distinctive Events • There were 2 flood basalt volcanoes • The flood basalt eruptions which produced the Siberian Traps constituted one of the largest known volcanic events on Earth • The Emeishan and Siberian Traps eruptions may have caused dust clouds which would have blocked out sunlight and disrupted photosynthesis both on land and in the upper layers of the seas, causing food chains to collapse

  9. Bibliography • http://en.wikipedia.org/wiki/Triassic • http://www.nature.com/nature/journal/v283/n5750/abs/283823a0.html • http://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event BOOM!!!!

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