Topic summary
Bayan Mandahu Formation
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 CretaceousPeriod. Laid down in the Campanian, it is dated somewhat uncertainly to between 75 and 71 mya (million years ago).