Abstract
The North China Platform was an extensive epeiric sea, formed on the tectonically stable Sino-Korean Block in the early Paleozoic. The sedimentary succession in the North China Platform comprises thick (ca. 1800m in thickness) mixed carbonate and siliciclastic sediments. Deposition was initiated in the Cambrian with ensued rise in sea level. The lower part of the succession represents initial marine flooding and stabilization of shallow marine environments. Production of carbonates kept up with the rise in sea level in the overlying Zhangxia Formation (Middle Cambrian), dominated by oolite and various microbialite facies. Bounded by a drowning unconformity, the overlying succession consists mainly of shale (Gushan Formation) and carbonate facies (Chaomidian Formation). Microbialites resurged and flourished as the platform was submerged again during the Furongian. The epeiric platform was eventually formed and maintained through the late Furongian to the Early Ordovician. There are high variabilities of sequence bounding surface.
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