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在凡是涉及地质学的学科中,要经常用到《地质年代表》,它就像指引方向的罗盘一样重要,指明地层的新老关系,为寻找矿产指明道路、坐标,足见其非常重要。地质工作者必须对《地质年代表》有着深刻的理解,但因其内涵深远,很难从表面认识太多的东西。怎样使人们对《地质年代表》的含义和意义理解更深,关系到他们在实际工作中使用它的自觉性和熟练程度。所以,在初识它时,不厌其详地学习《地质年代表》中的每个细节的含义,是非常必要的。地球自形成以来,至今已经过45亿至46亿年的岁月了。它上面的岩石圈以及大气圈、水圈和生物圈都经历过几个不同阶段的变化,而每一个阶段都为人类留
Geology in all disciplines, often to use the “geological year table”, which is as important as the compass direction of the compass, indicating the old and new stratigraphic relationship, in order to find minerals to specify the road, coordinates, it is very important to see. Geological workers must have a profound understanding of the “geochronology”, but because of its profound meaning, it is difficult to know too much from the surface. How to make people understand the meaning and significance of “geo-chronology” more deeply is related to their consciousness and proficiency in using it in practical work. Therefore, it is very necessary to learn the meaning of every detail in “Geological Chronicle” when we first recognize it. Since the formation of the Earth, it has passed 4.5 billion to 4.6 billion years. The lithosphere above it, as well as the atmosphere, hydrosphere and biosphere, have undergone several different stages of change, and each stage is for human beings