That results in a range that spans decades, not centuries.

采用地层学断代推算出的时间范围几十年，几百年。

Stratigraphy, which looks at the soil layers in which artefacts are found, tells you only which ones are older and which younger.

地层学采用的方法通过对已发现古代物的土壤层进行探测分析，从判断土壤年代的远近。

In fact, the geologists known as stratigraphers who determine the geologic timescale, have proposed a start date for the Anthropocene around 1950.

事实，地质时间尺度的地层学家地质学家已经提出了 1950 年左右人类世的开始日期。

Official ratification of the Crawford Lake site and the Anthropocene epoch requires passing three more votes of geological authorities, the subcommission on Quaternary Stratigraphy, the International Commission on Stratigraphy and finally the International Union of Geological Sciences.

克劳福德湖遗址和人类世时代的正式批准还需要经过地质当局、第四纪地层学小组委员会、国际地层学委员会和国际地质科学联合会的三次投票。