【摘要】 <正>一、概述 仓房沟位于乌鲁木齐市西南郊,地处博格达复背斜的西端边缘和天山北麓山前拗陷带南侧,地貌上属前山带向冲洪积平原的过渡地带。仓房沟本身为乌鲁木齐河中游的一条支流(图1)。 由于新生代造山运动的影响,这个地区的二叠系基岩受到强烈的侵蚀,形成了一条近西南-东北向的沟谷。第四纪中期,沟谷中开始沉积了厚层沉积物。其后,由于本区更多还原

【Abstract】 This report deals with the sporo-pollen analysis on 30 samples from the area of Cangfanggou of Urumqi River. Based on the changes in the sporo-pollen assemblages,four zones can be divided,demonstrating that this area has successively undergone several climatic variations during the periods of Late Pleistocene and Holocene: namely from the cold-dry to the slightly warm-humid, then to the cold-dry and to the cool-dry.更多还原