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地质,即地壳的成分和结构。根据生物的发展和地层形成的顺序,按地壳的发展历史划分为若干自然阶段,叫做地质年代。“宙”、“代”、“纪”、“世”分指地质年代分期的第一级、第二级、第三级、第四级。地质年代分期的第一级是宙。分为隐生宙(现已改称太古宙和元古宙)和显生宙。本刊将按照太古宙——元古宙——显生宙(古生代、中生代、新生代)的顺序进行连载解释。
Geology, the composition and structure of the crust. According to the development of biology and the formation of stratigraphic order, according to the history of the crust is divided into a number of natural stages, called the geological era. “Universe ”, “generation ”, “discipline ”, “world ” refers to the first stage, second stage, third stage, fourth stage of geologic age staging. The first stage of geological age is the universe. Divided into the hidden universe (now renamed Archean and Proterozoic) and Phanerozoic. This publication will follow the Archaean - Proterozoic - Phanerozoic (Paleozoic, Mesozoic, Cenozoic) in the order of serial interpretation.