- Country: USA
- Production start:
- Type: Oil / Gas
- Estimated Reserves:
- Production Volume:
- The Niobrara shale formation is located in northeastern Colorado with parts of the formation trending into Wyoming, Nebraska and Kansas.
- 2011 - Marubeni enters the Niobrara
- The formation is immature to the east and more mature to the west with production varying accordingly. Composed of Cretaceous rock, the Niobrara can be from 150 to 1,500 ft (46 to 451 m) thick with organic content ranging from one to five percent.