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The Jurassic Period
208-146 Million Years Ago
Many Dinosaurs, & the First Birds
Jurassic Period
At the beginning of this Period the Earth's continets were still jammed together, forming the "supercontinent Pangaea, but they were starting to drift apart. The climate was hot & dry at the beginning of this period, strongly seasonal.
During this time Birds were starting to appear along with Giant plant-eating Dinosaurs, Sauropods which walked on four legs. The Theropods also started to appear.
There was no polar ice during the last 2/3rd of the Jurassic Period. The climate was warm & moist & the sea levels high. There were vast flooded areas, temperate & subtropical forests & coral reefs. During the middle of the Period, the supercontinent Pangaea started to drift apart and form two continents.
Dinosaurs of the Jurassic Period
Theropods
Theropods were fast, two-legged carnivores with short arms.
- Sharp, slicing teeth & well-developed jaw muscles
- Carnivorous diet (animal eaters)
- Bipedal walk - (walk on two legs)
- Speed & Agility
- Hollow bons (like birds)
- Strong legs with bird-like, three-toed, clawed feet
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| Sauropods | These were the large hebivourous Dinosaurs. They were to include the largest dinosaurs known. Some were well over 100 feet long. |
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