关键词: 莲塘组, 湖口组, 风成沉积物, 河流沉积物, 赣江下游

Abstract: Liantang and Hukou formations widely distribute in down stream area of Ganjiang River. The different views have been existing about their formation times and environmental significance. Some researchers thought that they are alluvial sediments of Ganjiang River that formed in middle period of Pleistocene to beginning of later period of Pleistocene. Other researchers thought that they are aeolian sediment formed in later period of Pleistocene. By using ¹⁴C data, sedimentary texture, A-axis tendency of quartz sands, micro-morphologic pattern and sedimentary structure investigation, the author thinks that Liantang and Hukou formations formed after 30 ka BP. Liantang formation can be classified into two parts: the upper one and the lower one. The upper Liantang formation and Hukou formation are aeolian sediment, the lower Liantang formation is alluvial sediment of Ganjiang River. The great differences of sedimentary texture and structure between aeolian and alluvial sediment are pointed out.

Key words: Liantang formations, Hukou formation, aeolian sediment, alluvial sediment, down-stream area of Ganjiang River