Geological stratums from all eras, including the Pre-Cambrian period to the Paleozoic era, the Mesozoic era, and the Cenozoic era, are evenly distributed.

• 从年代角度看，从前寒武纪到古生代、中生代、新生代的所有地层均匀分布，岩石由各种火成岩、沉积岩及变质岩构成。