The “Historical Records” of the Earth

  A few kilometers south of Kanab town in Utah, USA, a huge monster came into view. It climbed from south to north and consisted of five large staircases of different colors. This is a large escalator. Picking up the stairs, you can climb the natural wonder.
  The Grand Lift is located above the Colorado Plateau, where the tributary of the Colorado River passes, scouring the surface. Under the combined action of wind and water, the layers of rock are stripped, revealing their hidden potential for thousands of years, and the history of those hidden in the rock is gradually unfolding.
  Colored history
  5 liter large step ladder layer each have their own color, each have their own history.
  At the bottom is a deep chocolate color, like a giant chocolate, seems to want to seduce a bite. However, if you really take a bite, it is good to say goodbye to your teeth. This chocolate-like step is mainly composed of limestone, formed between 225 million and 200 million years ago, that is, the Triassic period, which is 5 steps. The oldest qualification. At that time, North America was not North America. There was only one continent on the earth—the Pangu continent. In addition to the coast and river valleys, most of the inland areas were vast deserts. At that time, the North American continent was closely connected to the African continent and Eurasia, and its west was vast ocean. During this period, dinosaurs began to appear, and oviparous mammals began to thrive on the earth.
  To the upper level is a vermilion step, formed between 200 million and 165 million years ago, consisting of red sandstone. At this time, the earth has entered the Jurassic period, frequent volcanic activities pushed North America to the northwest, the crustal structure caused dramatic changes due to plate movement, and a series of orogenic movements began, such as the Nevada orogeny, Seville. The orogeny, the Laramie orogeny, and the Colorado Plateau gradually formed during this process. The species of this period has also been enriched, and mammals, birds, and angiosperms have emerged.
  The third layer is white, seeing the white sandstone, you may guess that this is the legacy of the Cretaceous, but it is not. This white ladder is still formed in the Jurassic, with a time span from mid to late Jurassic, and the youngest part was formed 150 million years ago. This step is the largest of the five steps, and the largest of the five steps, and the position is centered, so at first glance, it will probably be first attracted by the white ladder.
  Further up is a layer of gray steps. The color of the gray steps is not very contrasting with the color of the white steps. The two are separated by a limestone platform. The grey ladder was formed 130 million years ago and consists mainly of Cretaceous shale and sandstone. At this stage, dinosaurs went from prosperity to extinction, and mammals with placenta appeared.
  The last layer is the pink step, the youngest of the five steps, composed of sandstone and calcareous clay, formed between 6 million and 5 million years ago. At this time, the Earth has entered the Third Age, and most mammals have risen and become the new hegemon of the Earth.
  These five large steps, which record almost all of the history of the earth, are the geological archives of the earth, and are also a huge treasure house for geologists and archaeologists to trace the traces of earth creatures.
  The
  five treasures of the bio-remains from the bottom up, almost formed a complete timeline of the development of the earth’s biology, scientists in these well-defined rocks to search for fossils of different geological ages, to piece together the history of the development of biology.
  A large number of shells, sponges and other biological fossils are embedded in the rock, faithfully recording the history of the earth. Among them, most people are most interested in dinosaur fossils. Here, archaeologists have discovered a large number of dinosaur fossils that lived 75 million years ago. In 2002, a near-complete dinosaur fossil was discovered. This is a Griffin dragon, which is about 9 meters long and about 3 meters high. The powerful and powerful mouth contains more than 800 teeth. Later, scientists also discovered a new type of dinosaur, which has a prestige name – the southwest wind and blood dragon. This dinosaur lives on the North American continent about 95 million years ago. It is a branch of the Tyrannosaurus dinosaur. However, it is about 13 million years old than the well-known Tyrannosaurus Rex. It is considered to be the overlord. The oldest member of the Dragon Branch.
  Of course, human beings are also interested in ancient humans, and scientists are also here to explore the remains of ancient human settlements. Looking for traces of ancient humans, the scope of search is relatively small. After all, humans appear much later than other animals and plants. For example, in chocolate-colored rock formations, it is impossible to find human fossils.
  From all kinds of traces, the scientists found that in the ascending ladder, ancient humans chased traces of large animals such as mammoths, bison, and wild horses. It was determined by research that this chase occurred about 11,500 years ago. These animals are very It may be the main food of human beings at the time. By 9000 years ago, many large mammals had become extinct, when ancient humans turned hunting objects to small animals. Later, the lifestyle of collecting and farming gradually gained the upper hand. 1200 years ago, corn and pumpkin had become the main source of food for people at that time.
  The geological research on the large ascending ladder continues, and the large ascending ladder standing on the plateau seems to be quiet, but it is quietly telling the history of different geologic ages of the earth.