Dapingian
The Dapingian is the third stage of the Ordovician period and the first stage of the Middle Ordovician series. It is preceded by the Floian and succeeded by the Darriwilian. The top of the Floian is defined as the first appearance of the conodont species Baltoniodus triangularis which happened about 470 million years ago. The Dapingian lasted for about 2.7 million years until about 467.3 million years ago.
| Dapingian | |||||||||||
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| Chronology | |||||||||||
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| Etymology | |||||||||||
| Name formality | Formal | ||||||||||
| Usage information | |||||||||||
| Celestial body | Earth | ||||||||||
| Regional usage | Global (ICS) | ||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||
| Definition | |||||||||||
| Chronological unit | Age | ||||||||||
| Stratigraphic unit | Stage | ||||||||||
| Time span formality | Formal | ||||||||||
| Lower boundary definition | FAD of the Conodont Baltoniodus triangularis | ||||||||||
| Lower boundary GSSP | Huanghuachang section, Huanghuachang, Yichang, China 30.8605°N 111.3740°E | ||||||||||
| Lower GSSP ratified | 2007 | ||||||||||
| Upper boundary definition | FAD of the Graptolite Undulograptus austrodentatus | ||||||||||
| Upper boundary GSSP | Huangnitang Section, Huangnitang Village, Changshan, Zhejiang, China 28.8539°N 118.4897°E | ||||||||||
| Upper GSSP ratified | 1987 | ||||||||||
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