petrofacies

The paper has summarized systematically evolutionary law in time and space on petrofacies and paleogeography of Late Paleozoic era in Northern China and distributive law of depositional systems.

根据华北晚古生代沉岩系的环境标志,识别出29个相,归并为、河流、三角洲、潮汐砂滩、碳酸盐地等6个沉体系。