Fossils are the remains of ancient organisms, relics or relics that remain in rocks. The most common are bones and shells.
Fossils, remains or remains of ancient organisms buried underground and turned into stone-like objects. Studying fossils can help us understand the evolution of animals and determine the age of strata. The remains of ancient animals or plants preserved in rocks of the crust or evidence of their existence are called fossils. Fossils appeared from Archean (3.4 billion years ago) to Holocene (10,000 years ago).
Crocodiles have attracted special attention because of their evolutionary status: crocodiles are the last link between existing organisms and prehistoric dinosaur-like reptiles; at the same time, a large number of various crocodile fossils have been found; and three of the four suborders have been extinct. Based on these extensive fossil records, it is possible to establish clear relationships between crocodiles and other vertebrates.
Late Cretaceous is an important period in the evolutionary history of mammals, during which many populations began to differentiate to survive in different small environments. "Crocodiles are becoming more diverse from the late Cretaceous, up to 5 meters long and less than 1 meter small, to meet the needs of different living environments," said David Klaus.
Dinosaur fossils and dinosaur egg fossils are formed through long-term changes in the natural environment, which have high economic value, collection value and historical value.The length of this skeleton fossil is fourteen centimeters. Both heads are skeletons. The skeleton of the big head is nine centimeters. The skeleton of the small head is seven centimeters. The width of the drum stick in the middle bone. The bone rod in the middle is five centimeters thick.