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第四纪自然界的最大特点是具有轮回现象的变化,即冰期和间冰期,海侵和海退,剥蚀作用和堆积作用等交替现象,有机界也是适用于这种自然环境韵律变化而变化的。我国处于欧亚大陆的东南部,一方面受到世界共性第四纪气候变化的影响,而另方面也受到地区性的季风环流和寒暖海流变迁的控制,所以形成了我国自然界特有的个性,而有别于同纬位置的中欧和北美。我国第四纪气候变化和波动,在各种沉积类型中,地貌发育过程中,水系和水体变动中以及重大生物生态转变中,都有相当的反映。
Quaternary natural world is characterized by changes in the reincarnation phenomenon, that is, ice and interglacials, transgression and regression, erosion and accumulation of alternative phenomena, the organic community is also suitable for such changes in the rhythm of the natural environment changes. China is in the southeastern part of Eurasia, which is influenced by the common Quaternary climate change in the world on the one hand, and controlled by the changes of the regional monsoon circulation and the cold and warm currents in other aspects. Therefore, China has formed its unique personality in nature, Different from Central Europe and North America at the same latitude. The Quaternary climate change and fluctuations in China have been fairly reflected in various sedimentary types, geomorphologic development, changes in water systems and water bodies, and major biological and ecological changes.