The Daohugou Beds are a series of fossil-bearing rock deposits located in northeastern China, south of Chifeng, Inner Mongolia, around Daohugou village of Ningcheng county. The rocks are grey, finely bedded, lacustrine, sandy mudstones mixed with tuffaceous mudstones. The beds probably date from between the late Middle Jurassic (168 million years ago) and early Late Jurassic Period (164-152 million years ago).