【摘要】 东北三江平原的抚远、同江地区发现430多个大小和形状非常规则的泥炭地,经孢粉、残体、¹⁴C年代测定和粘土矿物分析,证明它是晚更新世晚期永冻区的冰丘演化而成。更多还原

【Abstract】 154 fossil-pingo lake peatlands were found in the first time during the investigation of the peatlands in the Sanjiang plain from 1983 to 1984. They are distributed in the area of 47°20’-48°38’ N and 133°-135°E. Their shapes and sizes are very similar to the fossil pingos. The peat layers lie on top of the clayey soils of the late Pleistocene, with an age of about 10,000 years B.P.. Therefore, it is believed that the peatlands were formed from fossil pingos existing during 21000-12000 years B.P.. Fossil pingos became fossil-pingo lakes due to their thaw settlement when the climate become worm in the early Holocene, The fossil-pingo lake peatlands resulted from the swamping of fossil-pingo lakes.更多还原