2000•Geology of ShandongRequires access

Conodont Associations in the Upper Part of Chaomidian Formation and Contact Line Determination of Cambrian and Ordovician in Qingzhou, Shandong Province

Hongda Zhang

Abstract

Through stratigraphic studies, Mingzu mountain profiles in Qingzhou area, Shandong province can be divided into five conodont belts. The contact line of Cambrian and Ordovician locates between Cordylodus proavus belt and Litacaonus benumadaoenis-Monocotodus severensis belt. Through contrast of regional strata, it is regarded that the contact line lies inside the Chaomidian formation, and the whole Lianghekou stage matches the upper part of Chaomidian formation.

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Key concepts: Conodont, Ordovician, Geology, Paleontology, Stage (stratigraphy), Tarim basin, Biostratigraphy