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本文是对吉林榆树周家油坊二级阶地沉积进行孢粉分析的总结。从孢粉资料可以说明,沉积物堆积时期的古植被属森林草原类型,气候寒冷较湿。通过孢粉组合对比,二级阶地形成的时代为晚更新世晚期。 周家油坊在吉林省榆树县西南18公里,因该处二级阶地盛产第四纪哺乳动物化石,所以该地不仅成为东北地区第四纪的“标准”地层之一,也尝有“榆树动物群”之称。但因化石层位欠清,所以在地质时代等问题上仍存争议。为了探讨“榆树动物群”的生活环境及阶地沉积的地质时代,建立该区第四纪孢粉地层层序,在二级阶地采集了一些样品进行孢粉分析。
This paper summarizes the sporopollen analysis of the sediments from the second terrace of Zhoujia Youfang in Jilin Province. From the palynological data, it can be shown that the ancient vegetation during the deposition of sediments belongs to the forest grassland type, and the climate is cold and wet. By the combination of sporopollen assemblages, the era of secondary terrace formation was late Late Pleistocene. Zhoujiayefang is located 18 kilometers southwest of Yushu County in Jilin Province. Because the Quaternary mammals fossils are abundant in the second terrace of the area, the site not only becomes one of the “standard” strata of Quaternary in Northeast China, but also has “Elm animals Group ”. However, due to the lack of fossil layers, so in the geological era and other issues are still controversial. In order to investigate the living environment of Ulmus fauna and the geologic age of terrace deposition, the sequence of Quaternary Sporopollen stratigraphy in this area was established, and some samples were collected for pollen analysis in the second terrace.