Introduction to paleontological crawling traces: Paleontological crawling traces. Ancient dinosaur fossils were discovered at the southwest foothills of Bagong Mountain, and ancient elephant megatooth fossils were discovered at the eastern foothills. Chinese geologists discovered this in northern Jiangsu and Anhui, especially in the Bagong Mountain area. Many paleontological and ancient animal fossils were discovered and named "Huainan Biota". Their development time was about 600 million to one billion years, and the most prosperous period was the Liulaobei Period.