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

采用地层断代推算出的时间范围几十，而不几。

Just published in geology by Aaron matching a geocrinologist at Melbourne University suggests.

刚刚由墨尔本大的地层家Aaron Matching发表在地质上的研究建议。

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

而地层采用的方法对已发现古代文物的土壤层进行探测分析，从而判断土壤代的远近。

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地质当局、第四纪地层小组委员会、国际地层委员会和国际地质科联合会的三次投票。