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
的环境标志,识别出29个相,归并为冲积扇、河流、三角洲、潮汐砂滩、碳酸盐台地等6个沉积
。


过鼻内镜对额窦开口及周围解剖

梦境

行为会留下明
痕,这些
像素模式


