【摘要】 本文应用花粉分析,对许家窑遗址沉积物的地质时代和古环境进行了探讨。指出:遗址沉积期间的气候比较寒冷,气温比现今低;其时的植被面貌,为森林草原类型;遗址沉积物的地质时代为晚更新世。更多还原

【Abstract】 The Xujiayao site is situated on the west bank of the Liyikou, a small tributary of the Sangan River, passing through Yangkao county, Shansi Province.There many pollen grains of arbor, shrub and herb have been found in the sediments. The arboreous pollen grains are mainly of coniferales including the genera Pinus, Picea, Abies and Betula etc. Shrub and herb pollen mainly belong to Ephedra, Artemisia Chenopodiaceae and Umbelliferae.Basing upon the results obtained it is believed that the Xujiayao site was once covered by a forest-steppe vegetation. The appearance of many cold-resistant members, such as Picea, Abies etc. in the flora implies a cold climate in the past, comparable to the wurm glacial stage in Europe and the Tali glacial stage in China with an average annual temperature of about 4° which is lower than that of today.Comparing this pollen spectrum with those of Huangshan near Harbin, Beijing plain and Peizhuangcun of Weinan. the site may be assigned, to the Late Pleistocene in age更多还原