Bayan Mandahu Formation

Bayan Mandahu Formation
Stratigraphic range: Campanian, 75–71 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Gobi Desert
Lithology
Primary	Sandstone
Location
Coordinates	41.75N 106.75E
Region	Inner Mongolia
Country	China
Type section
Named for	Bayan Mandahu, Urad Rear Banner, Inner Mongolia

The Bayan Mandahu Formation (also known as Wulansuhai Formation or Wuliangsuhai Formation) is a geological unit of "redbeds" located near the village of Bayan Mandahu in Inner Mongolia, China, in the Gobi Desert. It dates from the late Cretaceous Period. Laid down in the Campanian, it is dated somewhat uncertainly to between 75 and 71 mya (million years ago).^[1]