A long time before human beings walked the Earth, Dinosaurs were already out of existence. However, human knows much about these animals through the study of their fossils and remains. Every continent of the planet earth has recorded fossils of dinosaurs that lived in different periods. Most species have been found in China, Argentina, and the badlands and deserts of North America. These dinosaur fossils from North America, China, and Argentina are from Triassic, Jurassic and Cretaceous periods of existence.
In the Middle-Late Triassic Pekin Formation of North Carolina, unidentified theropod is the earliest recorded dinosaur to roan north America. However, this dinosaur has no recorded fossil remains but only left footprints and teeth. During the Triassic period, more dinosaur remains were gone, and they were more recognizable compared to the earliest. The fossils during this period include those of genera Gojirasaurus, Chindesaurus and Tawa like dinosaurs. The first Jurassic period saw fossils of dinosaurs like Anchisaurus and Dilophosaurus lived in North America. The middle Jurassic period did not see many recorded fossils in North America, although several dinosaur fossils were located in Mexico during this period. Fragments of bones, footprints, teeth. And eggshells of sauropods and theropods have been found in the North Part of America in the past.
During the late Jurassic period, the most abundant source of dinosaur fossils in the world, known as the Morrison formation, was during this period. The Morrison formation is found in Utah, Colorado, Montana, New Mexico, Texas, South Dakota, Oklahoma, and Wyoming. Dinosaur fossils in Morrison Formation are those of Allosaurus, Stokesosaurus, Marshosaurus, Coelurus, Tanycolagreus, Ceratosaurus, Torvosaurus, and Saurophaganax. Sauropods fossils of Barosaurus, Brachiosaurus, Diplodocus, Camarasaurus, and Apatosaurus are also found in Morrison Formation. Moreover, fossils of genera Stegosaurs and ornithopods are found there.
The early Cretaceous period had new species of dinosaurs, although sauropods were still around in North America. Theropods such as Utahraptoh and sauropods like Astrodon and Sauroposeidon existed during this period. The late Cretaceous period saw fossils of dinosaurs like titanosaur sauropod Alamosaurus, triceratops, torosaurus, and Nedoceratops, which were herbivorous dinosaurs in North America.
China is one of the most important centers of Paleontology due to a rich dinosaur fossils site in this region. Inner Mongolia Autonomous Region, there was the discovery of fossils of dinosaurs of the Late Cretaceous period. Mostly these fossils are mainly of Ankylosaurus and Ceratopsian from infant to adult dinosaurs. In Lufeng, a county in Yunnan Province, there has been a discovery of more than 110 dinosaur fossils with more than twenty families and species been discovered. Moreover, Zigong, a county in Sichuan Province in China, is a location of dinosaur fossils of the Jurassic period between 195 million to 137 million years ago. There have been more than hundreds of tons of dinosaur fossils unearthed from this location. Zigong Dinosaur Museum is one of the most prominent dinosaur museums in the world. In Henan province, a city called Nanyang is one of the earliest cites where dinosaur eggs were known to be discovered in China. Most of these thousands of fossilized eggs have been preserved for historical purposes. Finally, the Western Liaoning district in China has abundant dinosaur fossils of the early stages of the Cretaceous period. Among the fossils are those of Beipiaosaurus, caudipteryx, archaeopteryx, and Sinasauropteryx dinosaurs. These fossils in Liaoning District show that the dinosaurs were probably suddenly buried by deadly rains of volcano ash.
In recent years, a considerable amount of dinosaur fossils have been unearthed in Argentina. This region has become the powerhouse of paleontologists with more and more discoveries, narrowing the disparity in the Earth’s history. Being discovered in deserts make it easy to find and unearth these fossils. They are fossils of dinosaurs like Saltasaurus, which is a small sauropod of the Late Cretaceous Period, which was discovered in 1980. This is among the most significant discoveries since it marked the first discovery of the hard bone plates on the back dinosaur. The dinosaur was about 12 meters long, which was a herbivore. Another finding was that of Noasaurus in 1977. This dinosaur was between 1 to 3 meters long, and it lived during the Late Cretaceous Period, precisely the Maastrichtian stage. Noasaurus resembled a small velociraptor possessing sickle-like claw. The discovery consisted of a partial skeleton with a skull. The dinosaur was a carnivore that was named in 1980. Riojasaurus still was founded in Argentina. A most bird-like dinosaur was also discovered in Argentina, known as Unenlagia, in 1996. It lived during the Mid-Cretaceous Period, and its second skeleton was found in 2002.
The most massive herbivorous discovered Argentinosaurus fossils were found in Argentina. It lived during the Mid-Cretaceous Period. Some dorsal vertebras of Argentinosaurus are the most significant recorded ever. It was between 98 to 130 ft long. More so, the most massive carnivorous dinosaur fossils in the world were discovered here in July 1993. This dinosaur was known as Giganotosaurus that lived during the Late Cretaceous Period, specifically Cenomanian age. 80% of the fossils of Giganotosaurus has been preserved in optimum conditions. Many of the fossils discovered in Argentina are of the dinosaurs that lived during the Cretaceous Period.
Some fossils of the Triassic Period dinosaurs were still discovered in Argentina. These included Riojasaurus, one of the giant herbivore dinosaurs during that period. Although during the discovery, no skull was found with the first skeleton, later, a skull attributed to Riojasurus was found.
Furthermore, Argentina is the home to the fossils of both the most abundant carnivore and herbivore dinosaur. The fossils above are just a few of those found in Argentina. Ischigualasto Formation is a prominent place where most of these fossils have been preserved. Indeed, visitors can see these fossils in the ground still. Moreover, a museum setting of dinosaurs' experience has been provided by Argentinians, an example being ErnestoBachmann Dinosaur Museum. The museum offers a replica of dinosaur fossils resembling the way found on the ground. Some other parks and museums educate visitors more about the fossils discovered in Argentina. Thus, Argentina is one of the places where most of the dinosaur fossils have been found.