Daye Formation Explained

Daye Formation
Type:	Geological formation
Age:	Induan - early Olenekian,
Period:	Early Triassic
Prilithology:	Shale, limestone
Region:	south China
Country:	China
Thickness:	~10 meters

Daye Formation should not be confused with Daye Group.

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.

The Daye Formation hosts the Guiyang biota, as of 2023 the earliest known Mesozoic lagerstätte.^[3]

Notes and References

1. Gao,M. . Mei, M. . Giant Induan oolite: A case study from the Lower Triassic Daye Formation in the western Hubei Province, South China . Geoscience Frontiers . November 2012 . 3 . 6 . 843–851 . 10.1016/j.gsf.2011.11.017 . 2012GeoFr...3..843M . free .
2. Yang, T. . Wu, H. . Milankovitch and sub-Milankovitch cycles of the early Triassic Daye Formation, South China and their geochronological and paleoclimatic implications . Gondwana Research . December 16, 2011 . 22 . 2 . 748–759 . 10.1016/j.gr.2011.12.003 . 14 March 2023.
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. . A Mesozoic fossil lagerstätte from 250.8 million years ago shows a modern-type marine ecosystem . 2023 . Science . 379 . 6632 . 567–572 . 10.1126/science.adf1622 . 36758082 . 2023Sci...379..567D . 256697946 .