词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的环境标志,识别出29个相,归并为冲积扇、河流、三
洲、潮汐砂滩、碳酸盐台地等6个沉积体系。
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