
毛沟剖面厚 90m,主要出露早渐新世他拉组地层,岩性可分为三段:下段为紫红色砂砾岩;中段为紫红色粉砂岩和泥岩互层;上段为块状紫红色泥岩。
It is 90 meters thick and mainly composed of the lower Oligocepurplish red mudstone.ne Tala formation. The section can be divided into three parts based on its lithology: the lower part is purplish red conglomerate, the middle part is the interbedding of purplish red siltstone and mudstone, and the upper section is massive