中国石炭纪海域较之晚泥盆世已有扩大,此时中国北方塔里木-华北大陆已不再连接一起,而为其间的祁连海湾相隔。塔里木地台周围也有海泛。华北地台虽在早石炭世仍为陆地,继续剥蚀,但地形已逐渐过渡为准平原状态,至晚石炭世则沦为近海沼泽沉积环 The Carboniferous sea area in China has been expanded later than that of the Late Devonian. At this time, the northern Tarim-North China continent is no longer connected with each other, but separated by the Qilian Bay. There is also sea pan around the Tarim platform. Although the North China platform was still terrestrial in the early Carboniferous, it continued to be denuded, but the terrain gradually transitioned to the plains state, and the late Carboniferous became the sedimentary ring of the offshore marsh