理学
;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积岩系
环境标志,识别出29个相,归并为冲积扇、河流、三角洲、
滩、碳酸盐台
等6个沉积体系。
