[collection name]: Biologic fossils
Paleontology fossils have the most species, the most exquisite fossil preservation, and the highest scientific research value. Almost every new discovery amazes paleontologists. It should be said that the most beautiful and vivid language is the widely distributed paleontological fossils in the strata. The various geological events of gradual change and mutation recorded in the late Jurassic Early Cretaceous period in western Liaoning provide precious physical evidence for our scientific research today.
When an animal dies, the bacteria break down the tissues on the body. But if the body is left in the right place at the right time, some hard tissues such as bones, shells, teeth, etc. can be preserved. If they're lucky, paleontologists can dig out 3 million years old animal teeth from the rubble. They call these living specimens from ancient times to the present fossils. Some fossils are teeth, skeletons or shells of animals that have been buried for centuries, some are impressions of ancient animals and plants, such as the skeletons of marine creatures stretched on rocks. A replica of the animal's bone tissue formed by minerals on earth can also be called a fossil.
People have seen creatures from a long time ago through fossils. However, the formation of fossils is very demanding on the environment, and the most important thing is to avoid wind and rain. Only when the remains of animals and plants are buried under some kind of sediment, such as rock debris, soil, gravel or dust, can they form the environmental conditions for fossilization.
Sometimes bodies are buried in sediments in lakes, swamps or caves, which are also good places to bury fossils. But the most suitable place for breeding fossils is usually (or once was) the place with active geology, such as volcanic area or mountain area in growing period. The Himalayas are the growing mountains. The South Asian subcontinent and Eurasia are squeezing each other, raising the terrain here. In the process of mountain growth, many rocks will roll off the mountain, fall into the river, and then the river will send these rocks to the ocean. Bacteria are found all over the dry land environment, which can rapidly decompose the dead animals and plants. However, in the river bed soil, the tissues of animals and plants can be far away from the invasion of bacteria. So most of the fossils are found in water covered (or river flowing) soil.
How can people know where they come from without the evidence of primitive human fossils. In addition to human beings, we can find the answer from the fossils for all the biological evolution. According to the fossils, we will find many animals that are now extinct. But according to the fossils, scientists can also construct their glory at that time, such as dinosaurs. Besides these, fossils are also very important for geologists to study. According to fossils, geologists can infer the age of fossils from us, and the movement of the earth's crust and geologists can determine the distribution of a certain geological formation in a specific region. Some microbial fossils in the fossils can also be used as indicative fossils for the discovery of oil. Through the study of these small remains of paleontology, we can obtain the age and oil storage information of underground strata.
In Botany, flowers are the reproductive organs of angiosperms. Now there are about 250000 kinds of angiosperms on the earth. That is to say, there are more than 200000 kinds of different flowers blooming beautifully, embellishing our planet home. The knowledge of ancient life mainly comes from fossils. In the past hundred years, Chinese paleobotanists have found important fossils that show the mystery of plant evolution one after another through their efforts. These precious specimens show many key links in the long history of plant evolution, from the spores of ferns to the flowers of angiosperms. These specimens are called "model specimens" and are very rare at home and abroad.
Fossils are very important to uncover the past of the earth. They are the silent history left over from various periods. They incarnate themselves as stone like beings to tell the people who have them in those years and what happened in those years.
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