| Udurchukan Formation | |
|---|---|
| Stratigraphic range: Maastrichtian ~ | |
| Type | Geological formation |
| Unit of | Tsagayan Group |
| Underlies | Bureya Formation |
| Overlies | Kundur Formation |
| Thickness | 11 metres (40 ft) exposed at Kundur locality |
| Lithology | |
| Primary | Conglomerate, mudstone, diamictite |
| Other | Sandstone |
| Location | |
| Coordinates | 49°30′N 129°30′E / 49.5°N 129.5°E |
| Approximate paleocoordinates | 51°24′N 115°48′E / 51.4°N 115.8°E |
| Region |  Amur Oblast |
| Country |  Russia |
| Extent | Zeya-Bureya Basin |
  Udurchukan Formation (Russia) | |
The Udurchukan Formation is a geological formation located in Amur Region, Far East Russia. Based on palynomorphs such as Wodehouseia spinata, the Udurchukan is considered of Maastrichtian age of the Late Cretaceous, during the Cretaceous Period.