PROBLEMS OF QUATERNARY ENVIRONMENTAL EVOLUTION AND GEOMORPHOLOGICAL DEVELOPMENT IN THE LUSHAN

The major Quaternary climatic deterioration of the Lushan area occurred mainly in LatePleistocene when a periglacial environment prevailed on the high summits above 1000 m a.s.l.with resulting frost shattering and gelifluction. The data from sporo-pollen analysis, fossilfauna, paleosols and the elevation of the snowline in the ice ages prove that conditions for thedevelopment of the glaciers did not exist in the Lushan during early and middle Quaternaryperiod. Evidence of former glaciation has not been found in the study on the type sedimen-tary sections in Yejialong and Dajiaochang gully. There are many relict landforms belong-ing to hot and humid tropical climate rather than to glacial one. The problems of the land-form development of the Lushan are also discussed.     

庐山第四纪环境演变和地貌发育问题

庐山地区第四纪气候变冷主要发生在晚更新世,当时1,000米以上的山地有过冰缘环境,发生寒冻风化及融冻泥流作用。孢粉、古动物群、古土壤及古雪线资料说明庐山在第四纪早、中期没有发育冰川的条件。叶家垄和大校场冲沟的典型沉积剖面的分析未发现冰川信息。在庐山大量存在的是湿热地区的地貌遗迹,不存在冰川遗迹,并讨论了庐山地貌发育史问题。