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Dapingian

Subdivision of the Ordovician according to the ICS, as of 2024.Vertical axis scale: Millions of years agoEtymologyName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of the ConodontBaltoniodus triangularisLower boundary GSSPHuanghuachang section, Huanghuachang, Yichang, China30°51′38″N110°22′26″E / 30.8605°N 110.3740°E / 30.8605; 110.3740Lower GSSP ratified2007Upper boundary definitionFAD of the GraptoliteUpper boundary GSSPHuangnitang Section, Huangnitang Village, Changshan, Zhejiang, China28°51′14″N118°29′23″E / 28.8539°N 118.4897°E / 28.8539; 118.4897Upper GSSP ratified1997The Dapingian is the third stage of the Ordovician system and the first stage of the Middle Ordovician series.

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