Dinosaurs of the Jurassic Period
DINOSAURS OF THE
JURASSIC PERIOD
I am writing this paper on the Jurassic Period. I will be talking about the different periods of dinosaurs. What dinosaur life was like during the Jurassic Period. I will also be going more in depth with several dinosaurs that lived during the early, middle, and late Jurassic Period. The history of the Jurassic Period in North America as well as Mexico also caught my interest.
The three ages of Dinosaurs were in the Triassic, Jurassic, and Cretaceous periods. First I would like to explain all 3 periods before getting into the Jurassic period more specifically. The start of the Triassic period followed the Permian Extinction, an event of unknown cause that wiped out over two-thirds of land-dwelling vertebrates and 95 percent of ocean-dwelling species. It was during the late Triassic period that the mammal-like reptiles evolved into the first mammals. During the Triassic period, all of the earth's continents were joined together into a vast landmass called Pangaea. There were as yet no polar ice caps, and the climate was hot and dry, punctuated by violent monsoons. Except for insects, the skies of the early Triassic period were relatively quiet. The Triassic period wasn't nearly as lush and green as the later Jurassic and Cretaceous periods, but it did see an explosion of various land-dwelling plants, including cycads, ferns, and Gingko-like trees. Part of the reason there were no enormous dinosaurs during the Triassic (along the lines of Brachiosaurus) is that there simply wasn’t enough vegetation to nourish them!
During the Jurassic period, relatives of the small, quadrupedal, plant-eating prosauropods of the Triassic period gradually evolved into gigantic sauropods like Brachiosaurus and Diplodocus. This period also saw the rise of medium- to large-sized theropod dinosaurs like Allosaurus and Megalosaurus, which helps explain the evolution of the earliest ankylosaurs (armored herbivorous dinosaurs). The
JURASSIC PERIOD
I am writing this paper on the Jurassic Period. I will be talking about the different periods of dinosaurs. What dinosaur life was like during the Jurassic Period. I will also be going more in depth with several dinosaurs that lived during the early, middle, and late Jurassic Period. The history of the Jurassic Period in North America as well as Mexico also caught my interest.
The three ages of Dinosaurs were in the Triassic, Jurassic, and Cretaceous periods. First I would like to explain all 3 periods before getting into the Jurassic period more specifically. The start of the Triassic period followed the Permian Extinction, an event of unknown cause that wiped out over two-thirds of land-dwelling vertebrates and 95 percent of ocean-dwelling species. It was during the late Triassic period that the mammal-like reptiles evolved into the first mammals. During the Triassic period, all of the earth's continents were joined together into a vast landmass called Pangaea. There were as yet no polar ice caps, and the climate was hot and dry, punctuated by violent monsoons. Except for insects, the skies of the early Triassic period were relatively quiet. The Triassic period wasn't nearly as lush and green as the later Jurassic and Cretaceous periods, but it did see an explosion of various land-dwelling plants, including cycads, ferns, and Gingko-like trees. Part of the reason there were no enormous dinosaurs during the Triassic (along the lines of Brachiosaurus) is that there simply wasn’t enough vegetation to nourish them!
During the Jurassic period, relatives of the small, quadrupedal, plant-eating prosauropods of the Triassic period gradually evolved into gigantic sauropods like Brachiosaurus and Diplodocus. This period also saw the rise of medium- to large-sized theropod dinosaurs like Allosaurus and Megalosaurus, which helps explain the evolution of the earliest ankylosaurs (armored herbivorous dinosaurs). The