Bayanshiree Formation
| Bayanshiree Formation | |
|---|---|
| Stratigraphic range: Cenomanian-Coniacian ~ | |
| Type | Geological formation |
| Sub-units | Upper beds, lower beds |
| Underlies | Javkhlant Formation |
| Overlies | Baruunbayan Formation |
| Thickness | Up to 300 m (980 ft) |
| Lithology | |
| Primary | Claystone, sandstone |
| Other | Conglomerate, mudstone |
| Location | |
| Coordinates | 44°18′N 109°12′E / 44.3°N 109.2°E |
| Approximate paleocoordinates | 46°30′N 100°00′E / 46.5°N 100.0°E |
| Region | Gobi Desert |
| Country | Mongolia |
| Type section | |
| Named for | Bayan Shireh Cliffs |
| Named by | Vasiliev et al. |
| Year defined | 1959 |
Fossil localities in Mongolia. From C to D, mainly Bayanshiree locations | |
The Bayanshiree Formation (also known as Baynshiree/Baynshire, Baynshirenskaya Svita, Baysheen Shireh, or Bayan Shireh) is a geological formation in Mongolia, that dates to the Cretaceous period. It was first described and established by Vasiliev et al. 1959.