| Lopingian | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
.png) A map of Earth as it appeared 255 million years ago during the Lopingian Epoch, Wuchiapingian Age | |||||||||||||
| Chronology | |||||||||||||
| |||||||||||||
| Etymology | |||||||||||||
| Name formality | Formal | ||||||||||||
| Synonym(s) | Late/Upper Permian | ||||||||||||
| Usage information | |||||||||||||
| Celestial body | Earth | ||||||||||||
| Regional usage | Global (ICS) | ||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||
| Definition | |||||||||||||
| Chronological unit | Epoch | ||||||||||||
| Stratigraphic unit | Series | ||||||||||||
| Time span formality | Formal | ||||||||||||
| Lower boundary definition | FAD of the Conodont Clarkina postbitteri postbitteri | ||||||||||||
| Lower boundary GSSP | Penglaitan Section, Laibin, Guangxi, China 23°41′43″N 109°19′16″E / 23.6953°N 109.3211°E | ||||||||||||
| Lower GSSP ratified | 2004[2] | ||||||||||||
| Upper boundary definition | FAD of the Conodont Hindeodus parvus. | ||||||||||||
| Upper boundary GSSP | Meishan, Zhejiang, China 31°04′47″N 119°42′21″E / 31.0798°N 119.7058°E | ||||||||||||
| Upper GSSP ratified | 2001[3] | ||||||||||||
The Lopingian is the uppermost series/last epoch of the Permian.[4] It is the last epoch of the Paleozoic. The Lopingian was preceded by the Guadalupian and followed by the Early Triassic.
The Lopingian is often synonymous with the informal terms late Permian or upper Permian.
The name was introduced by Amadeus William Grabau in 1931 and derives from Leping, Jiangxi in China.[5] It consists of two stages/ages. The earlier is the Wuchiapingian and the later is the Changhsingian.[6]
The International Chronostratigraphic Chart (v2018/07)[4] provides a numerical age of 259.1 ±0.5 Ma. If a Global Boundary Stratotype Section and Point (GSSP) has been approved, the lower boundary of the earliest stage determines numerical age of an epoch. The GSSP for the Wuchiapingian has a numerical age of 259.8 ± 0.4 Ma.[7][8]
Evidence from Milankovitch cycles suggests that the length of an Earth day during this epoch was approximately 22 hours.[9]
- ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved 10 November 2024.
- ^ Jin, Yugan; Shen, Shuzhong; Henderson, Charles; Wang, Xiangdong; Wang, Wei; Wang, Yue; Cao, Changqun; Shang, Qinghua (December 2006). "The Global Stratotype Section and Point (GSSP) for the boundary between the Capitanian and Wuchiapingian Stage (Permian)" (PDF). Episodes. 29 (4): 253–262. doi:10.18814/epiiugs/2006/v29i4/003. Retrieved 13 December 2020.
- ^ Hongfu, Yin; Kexin, Zhang; Jinnan, Tong; Zunyi, Yang; Shunbao, Wu (June 2001). "The Global Stratotype Section and Point (GSSP) of the Permian-Triassic Boundary" (PDF). Episodes. 24 (2): 102–114. doi:10.18814/epiiugs/2001/v24i2/004. Retrieved 8 December 2020.
- ^ a b International Commission on Stratigraphy. "Chart". Retrieved 10 July 2018.
- ^ Zhang, Shouxin (2009). Geological Formation Names of China (1866–2000). Beijing/Dordrecht: Higher Education Press/Springer. p. 681. ISBN 978-7-040-25475-4.
- ^ Allaby, Michael (2015). A Dictionary of Geology and Earth Sciences (4th ed.). Oxford University Press. doi:10.1093/acref/9780199653065.001.0001. ISBN 9780199653065.
- ^ International Commission on Stratigraphy. "GSSPs". Retrieved 10 July 2018.
- ^ Gradstein, Felix M.; Ogg, James G.; Smith, Alan G. (2004). A Geologic Time Scale 2004. Cambridge University Press. ISBN 9780521786737.
- ^ Wu, Huaichun; Zhang, Shihong; Hinnov, Linda A.; Jiang, Ganqing; Feng, Qinglai; Li, Haiyan; Yang, Tianshui (13 September 2013). "Time-calibrated Milankovitch cycles for the late Permian". Nature Communications. 4: 2452. Bibcode:2013NatCo...4.2452W. doi:10.1038/ncomms3452. PMC 3778519. PMID 24030138. S2CID 6477972.