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“第四纪”是一个陈旧的名词,必须予以抛弃。建议广泛采用“人类纪”一词,因为这个时代是人类的时代。 确定人类纪的下界必须遵循这样一个原则,即真正的人类首次出现之时。更新世是最近一次大冰期,所以确定更新世的下界必须遵循另一条标准,也就是中纬度地区首次冰期出现的时间。目前,这两种界线是一致的,大约在3—3.4百万年前。 进一步将人类纪细分时,作者建议采用综合的原则,即将古生物(包括古人类)标准与古气候标准密切结合起来,近代年代学方法有着定量的巨大优越性。 根据现有资料,在人类纪内部有以下几条界线:1.0—1.2,0.73,0.2,0.07,0.01—0.012百万年。依据前述原则把更新世分为五期:1、古更新期,3.0～3.4——1.0——1.2百万年前,2、始更新期,1.0～1.2——0.73百万年前,3、中更新期,0.73——0.2百万年前,4、晚更新期,0.2——0.07百万年前,5、新更新期,0.07—0.012—0.01百万年前,加上全新世,人类纪就可分为六段。
Quaternary is an old term that must be abandoned. It is recommended that the term “humankind” be widely adopted because this era is a human age. The determination of the lower bound of human discipline must follow the principle that when a true human first appears. The Pleistocene was the latest of the Great Ice Age, so the lower bound of the Pleistocene must follow another criterion, the time of its first glacial onset in mid-latitudes. At present, these two kinds of boundaries are the same, about 3-3.4 million years ago. When further dividing humankind, the author suggests adopting the integrated principle that the criteria of paleontology (including ancient humans) should be closely integrated with paleoclimatic criteria, and that modern chronological methods have great quantitative superiority. According to the available information, there are several boundaries within humankind: 1.0-1.2,0.73,0.2,0.07,0.01-0.012 million years. According to the aforementioned principle, the Pleistocene is divided into five periods: 1, paleoenalysis, 3.0 ~ 3.4--1.0--1.2 million years ago, 2, initial renewal period, 1.0 ~ 1.2--0.73 million years ago, Mid-life, 0.73--0.2 million years ago, 4, late nights, 0.2--0.07 million years ago, 5, Newly updated, 0.07-0.012-0.01 million years ago, plus the Holocene, humans Ji can be divided into six sections.