大家知道,中國黄土的研究在整个黄土問題上具有多么重要的意义。可以說,当我們初次認識这些岩層時,就發生黄土的問題,並燃超了第一次的、熱烈的关于这些沉積物的成因的爭論。这些爭論一直延续到现在。目前在中國黄土的研究上巳進入完全新的时期,即使它不能完全解决中國黄土的問題,那末無論如何出可以在这个問题上提出非常重要的補充和闡明。在B.A.奥勃魯切夫院士著名的著作發表之 We all know how important the study of Chinese loess is on the entire issue of loess. It can be said that the problem of loess occurred when we first recognized these rock formations and led to the first and most heated debate over the causes of these sediments. These debates have continued until now. At present, the study of loess in China has entered a completely new period. Even if it can not completely solve the problem of loess in China, it can at any rate put forward a very important supplement and clarification on this issue. In the famous book by B.A. O’Brushchev published