Daye Formation

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.

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)

Not to be confused with Daye Group.

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