The Daye Formation is a geologic formation in South China, dating from the Induan up to the early Olenekian (early Triassic).^[1][2] It is of interest as it spans the period immediately after the Permian-Triassic extinction event, the most severe mass extinction known in Earth history.

Key Information

Daye Formation
Stratigraphic range: Induan - early Olenekian, 252.3–250.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Thickness	~10 meters
Lithology
Primary	Shale, limestone
Location
Region	south China
Country	China
Daye Formation (China)
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The Daye Formation hosts the Guiyang biota, as of 2023 the earliest known Mesozoic lagerstätte.^[3]

1. ^ Gao, M., Mei, M. (November 2012). "Giant Induan oolite: A case study from the Lower Triassic Daye Formation in the western Hubei Province, South China". Geoscience Frontiers. 3 (6): 843–851. Bibcode:2012GeoFr...3..843M. doi:10.1016/j.gsf.2011.11.017.{{cite journal}}: CS1 maint: multiple names: authors list (link)
2. ^ Yang, T., Wu, H. (December 16, 2011). "Milankovitch and sub-Milankovitch cycles of the early Triassic Daye Formation, South China and their geochronological and paleoclimatic implications". Gondwana Research. 22 (2): 748–759. doi:10.1016/j.gr.2011.12.003. Retrieved 14 March 2023.{{cite journal}}: CS1 maint: multiple names: authors list (link)
3. ^ Dai, X.; Davies, J. H. F. L.; Yuan, Z.; Brayard, A.; Ovtcharova, M.; Xu, G.; Liu, X.; Smith, C. P. A.; Schweitzer, C. E.; Li, M.; Perrot, M. G.; Jiang, S.; Miao, L.; Cao, Y.; Yan, J.; Bai, R.; Wang, F.; Guo, W.; Song, H.; Tian, L.; Dal Corso, J.; Liu, Y.; Chu, D.; Song, H. (2023). "A Mesozoic fossil lagerstätte from 250.8 million years ago shows a modern-type marine ecosystem". Science. 379 (6632): 567–572. Bibcode:2023Sci...379..567D. doi:10.1126/science.adf1622. PMID 36758082. S2CID 256697946.

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