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一、黄土之定义与其研究历史“黄土”这个名词是个地质名词,与一般的“土的名称,如粘土、砂土等名称的概念不同。黄土是第四纪的特殊沉积物,它具有一定的外部与内部的特性,而且在地层学上与古地理上有一定的意义. 在野外所见到的黄土有下面几个特征: (1)颜色多为灰黄、黄或弱黄色; (2)含有多量的石灰质(CaCO_3)结核,结核形状不一,有的成粒状,有的成条状;
I. THE DEFINITION OF LOESS AND ITS RESEARCH History The term “loess” is a term of geology that is different from the general notion of "names of soils, such as clay, sand, etc. Loess is a special Quaternary sediment that has a certain External and internal characteristics, but also has certain significance in terms of stratigraphy and palaeogeography.The loess seen in the field has the following characteristics: (1) the color is mostly gray-yellow, yellow or weak yellow; (2) Containing a large amount of calcareous (CaCO_3) tuberculosis, tuberculosis in different shapes, and some granular, and some into a strip;