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Dapingian Stage
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Ordovician System
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Ordovician System
Ordovician System The Ordovician Period began 485.4 million years ago and ended 443.8 million years ago.

Dapingian Stage

geology and stratigraphy
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Written by
John P. Rafferty
John P. Rafferty writes about Earth processes and the environment. He serves currently as the editor of Earth and life sciences, covering climatology, geology, zoology, and other topics that relate to...
John P. Rafferty
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Article History

Dapingian Stage, first of two internationally defined stages of the Middle Ordovician Series, encompassing all rocks deposited during the Dapingian Age (470 million to 467.3 million years ago) of the Ordovician Period.

In 2007 the International Commission on Stratigraphy established the Global Stratotype Section and Point (GSSP) defining the base of this unit in the shale of the Dawan Formation at the centre of the Ordovician Geopark near Huanghuachang, Hubei, China. The GSSP marks the first appearance of the conodont Baltoniodus triangularis in the fossil record. In addition, the first appearance of the chitinozoan (a type of marine plankton) believed to be Belonechitina henryi is nearly coincident with the GSSP. The Dapingian Stage follows the Floian Stage of the Lower Ordovician Series and precedes the Darriwilian Stage.

John P. Rafferty