澳大利亚南部科沼泽地区强壮人类的末次盛冰期年龄。

Last Glacial Maximum ages for robust humans at Kow Swamp, southern Australia.

作者信息

Stone Tim, Cupper Matthew L

机构信息

School of Earth Sciences, The University of Melbourne, 3010, Victoria, Australia.

出版信息

J Hum Evol. 2003 Aug;45(2):99-111. doi: 10.1016/s0047-2484(03)00087-3.

DOI:10.1016/s0047-2484(03)00087-3

PMID:14529647

Abstract

The Kow Swamp people are a fossil population of robust modern humans. We report optically stimulated luminescence (OSL) ages on sediments from Kow Swamp that are at odds with radiocarbon ages obtained previously for the site. The calibrated 14C ages place the Kow Swamp people in the period 15-9 ka. Our single aliquot OSL ages suggest that they lived around the time of the Last Glacial Maximum (LGM) between 22 and 19 ka. An LGM age for the Kow Swamp people is supported by palaeoenvironmental reconstruction. The shoreline silt, in which most of them were interred, was deposited by high lake levels between 26 and 19 ka. Few robust people were left after 19 ka when a sand lunette formed. Climate change may explain the demise of this unusual genetic population.

摘要

科澳沼泽人是强壮的现代人类化石群体。我们报告了科澳沼泽沉积物的光释光（OSL）年龄，这些年龄与该地点之前获得的放射性碳年龄不一致。经校准的14C年龄表明科澳沼泽人生活在15至9千年前。我们的单份 aliquots OSL年龄表明，他们生活在末次盛冰期（LGM）前后，即22至19千年前。古环境重建支持了科澳沼泽人的LGM年龄。埋葬他们大多数人的海岸线淤泥是在26至19千年前的高湖水位时沉积的。19千年后形成沙质新月形沙丘时，几乎没有强壮的人留存下来。气候变化可能解释了这个不寻常基因群体的消亡。