论文部分内容阅读
我国北方地区广泛发育有第四纪黄土沉积物.黄土的复盖面积约为50—60万平方公里.黄土沉积物的研究工作与国民经济的发展具有极其密切的关系.
Quaternary loess sediments are widely developed in northern China, covering an area of 500,000 to 600,000 square kilometers. The study of loess sediments is closely related to the development of the national economy.