Dapingian

Dapingian
470.0 ± 1.4 – 467.3 ± 1.1 Ma
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionFAD of the Conodont Baltoniodus triangularis
Lower boundary GSSPHuanghuachang section, Huanghuachang, Yichang, China
30°51′38″N 110°22′26″E / 30.8605°N 110.3740°E / 30.8605; 110.3740
Lower GSSP ratified2007[5]
Upper boundary definitionFAD of the Graptolite Undulograptus austrodentatus
Upper boundary GSSPHuangnitang Section, Huangnitang Village, Changshan, Zhejiang, China
28°51′14″N 118°29′23″E / 28.8539°N 118.4897°E / 28.8539; 118.4897
Upper GSSP ratified1997[6]

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 470 million years ago. The Dapingian lasted for about 2.7 million years until about 467.3 million years ago.[7]

  1. ^ Wellman, C.H.; Gray, J. (2000). "The microfossil record of early land plants". Phil. Trans. R. Soc. B. 355 (1398): 717–732. doi:10.1098/rstb.2000.0612. PMC 1692785. PMID 10905606.
  2. ^ Korochantseva, Ekaterina; Trieloff, Mario; Lorenz, Cyrill; Buykin, Alexey; Ivanova, Marina; Schwarz, Winfried; Hopp, Jens; Jessberger, Elmar (2007). "L-chondrite asteroid breakup tied to Ordovician meteorite shower by multiple isochron 40 Ar- 39 Ar dating". Meteoritics & Planetary Science. 42 (1): 113–130. Bibcode:2007M&PS...42..113K. doi:10.1111/j.1945-5100.2007.tb00221.x.
  3. ^ Lindskog, A.; Costa, M. M.; Rasmussen, C.M.Ø.; Connelly, J. N.; Eriksson, M. E. (2017-01-24). "Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification". Nature Communications. 8: 14066. doi:10.1038/ncomms14066. ISSN 2041-1723. PMC 5286199. PMID 28117834. It has been suggested that the Middle Ordovician meteorite bombardment played a crucial role in the Great Ordovician Biodiversification Event, but this study shows that the two phenomena were unrelated
  4. ^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
  5. ^ Chen, Xu; Bergström, Stig; Zhang, Yuan-Dong; Fan, Jun-Xuan (2009). "The base of the Middle Ordovician in China with special reference to the succession at Hengtang near Jiangshan, Zhejiang Province, southern China" (PDF). Lethaia. 42 (2): 218–231. doi:10.1111/j.1502-3931.2008.00148.x. Archived (PDF) from the original on 2024-06-04. Retrieved 2024-06-30.
  6. ^ Mitchell, C.; Xu, Chen; Yuan-dong, Zhang; ZhI-hao, Wang; Webby, B.; Finney, S. (September 1997). "Definition of a global boundary stratotype for the Darriwilian Stage of the Ordovician System" (PDF). Episodes. 20 (3): 158–166. doi:10.18814/epiiugs/1997/v20i3/003. Archived (PDF) from the original on 2023-06-27. Retrieved 2024-06-30.
  7. ^ "GSSP Table - Paleozoic Era". Geologic TimeScale Foundation. Retrieved 2024-06-30.