1973, under the organization of Yunnan Provincial Museum, a large-scale excavation work was carried out on the land where Yuanmou man's fossils were unearthed, and 17 pieces of stone tools were obtained, including scrapers and pointy tools, which were made and used by Yuanmou man.
During the excavation of Yuanmou man's fossil layer, a large number of dense carbon chips and lumps were also found, which may be burnt bones, indicating that Yuanmou man was likely to use fire.
In the mid-1970s, three units, including the Chinese Academy of Geological Sciences, made paleomagnetic measurements of Yuanmou Formation in Yuanmou Basin, and thus studied that the age of Yuanmou Man was the Early Pleistocene, about1700,000 years ago.
Extended data:
1983 it was suggested that the age of Yuanmou was not more than 730,000 years ago, that is, it might be 500,000-600,000 years ago. In order to determine the paleomagnetism of the fourth member of Yuanmou Formation more accurately, in the spring of 1984, Qian Fang and others went to Yuanmou again to take encrypted samples in the fourth member.
At the beginning of 1987, at the International Symposium on Paleoenvironment in East Asia held in Hong Kong, the academic circles demonstrated and questioned the age of Yuanmou Man. Finally, the scientific conclusion that the age of Yuanmou Man was1700,000 years ago was generally recognized by the academic circles.
19841February, Zhou Guoxing and others of the beijing museum of natural history field expedition team found another human tibia fossil 250 meters south of the Yuanmou fossil.
This series of important discoveries has formed a complete series of ancient civilizations, which shows that the Yangtze River basin is also the cradle of the Chinese nation, and once again shows that Yunnan is one of the important regions of human origin and evolution.
References:
Baidu Encyclopedia-Yuanmou Man