Chaoyang is one of the richest areas of the Mesozoic fossils in China. It is buried in a large forest hundreds of millions of years ago. In the wood fossil park, these are both stones and trees. They are all original stones. They are not polished and polished. They are more primitive and rougher. After polishing and polishing, the color of the tree fossils is different. Generally speaking, after polishing, the fossils will be more lustrous, and its color will be very beautiful. How many years have these wood fossils been? It is said that the minimum is 160 million years. As you can imagine, this is a product that spans the long river of time. The commentator said that the wood fossils in front of them are pasted with nodules. Because when trees form fossils, not all trees can form fossils, only one of them is only a small one. Can form fossils. Most of them form coal or oil. In comparison, the conditions for forming fossils are generally harsh. The reasons for the formation of these fossils are also worth studying. Usually, some geological disasters, such as earthquakes, volcanic eruptions, mudslides, etc., bury the tree in the ground, and the minerals and organics after the air is isolated. Wood fossils are formed when the substance undergoes a displacement reaction. wood fossils are relatively hard, with Mohs hardness of 7 to 8, which is comparable to diamonds.