The controlled roles of coal－ accumulation by paleostructure and paleogeography and sedimentary environment have been explained, through analysis and study of Late Paleozoic coal－ bearing strata in Ningxia Region.
通过对宁夏晚古生代含煤岩系的分析研究，阐述了古构造、古地理、沉积环境对煤层聚积的控制作用。