2 Million Year Old Tools Discovered in China Suggests Human Left Africa Earlier Than Previously Thought
The artefacts show that our earliest human ancestors colonized East Asia over two million years ago. They were found by a Chinese team that was led by Professor Zhaoyu Zhu of the Chinese Academy of Sciences, and included Professor Robin Dennell of Exeter University. Discovery of ancient tools in China suggests humans left Africa earlier than previously thought
Photo credit Professor Zhaoyu Zhu
Picture taken at the site of the discovery of ancient tools in China.
Prof. Zhaoyu Zhu
The artefacts include a notch, scrapers, cobble, hammer stones and pointed pieces. All show signs of use – the stone had been intentionally flaked. Most were made of quartzite and quartz that probably came from the foothills of the Qinling Mountains 5 to 10 km to the south of the site, and the streams flowing from them. Fragments of animal bones 2.12 million years old were also found.
2.1 million years old artefacts
Photo credit Professor Zhaoyu Zhu
The Chinese Loess Plateau covers about 270,000 square kilometres, and during the past 2.6m years between 100 and 300m of wind-blown dust – known as loess – has been deposited in the area.
The 80 stone artefacts were found predominantly in 11 different layers of fossil soils which developed in a warm and wet climate. A further 16 items were found in six layers of loess that developed under colder and drier conditions. These 17 different layers of loess and fossil soils were formed during a period spanning almost a million years. This shows that early types of humans occupied the Chinese Loess Plateau under different climatic conditions between 1.2 and 2.12 million years ago.
Professor Dennell said: “Our discovery means it is necessary now to reconsider the timing of when early humans left Africa”.
Hominin occupation of the Chinese Loess Plateau since about 2.1 million years ago is published in Nature on Wednesday, July 11 2018.
Contacts and sources:
Exeter University
Citation: Hominin occupation of the Chinese Loess Plateau since about 2.1 million years ago.
Zhaoyu Zhu, Robin Dennell, Weiwen Huang, Yi Wu, Shifan Qiu, Shixia Yang, Zhiguo Rao, Yamei Hou, Jiubing Xie, Jiangwei Han, Tingping Ouyang. Nature, 2018; DOI: 10.1038/s41586-018-0299-4
Source: http://www.ineffableisland.com/2018/07/2-million-year-old-tools-discovered-in.html
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