Dapingian

EtymologyName 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, China
30°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, China
28°51′14″N118°29′23″E / 28.8539°N 118.4897°E / 28.8539; 118.4897Upper GSSP ratified1997

The Dapingian is the third stage of the Ordovician system and the first stage of the Middle Ordovician series. It is preceded by the Floian and succeeded by the Darriwilian. The base of the Dapingian (and the top of the Floian) is defined as the first appearance of the conodont species Baltoniodus triangularis which happened about 471.3 million years ago. The Dapingian lasted for about 1.9 million years until about 469.4 million years ago.