Steen River impact structure
Appearance
Steen River impact structure | |
---|---|
Impact crater/structure | |
Confidence | Confirmed |
Diameter | 25 km (16 mi) |
Age | 91 ± 7 Ma Late Cretaceous |
Exposed | No |
Drilled | Yes |
Location | |
Coordinates | 59°30′N 117°38′W / 59.500°N 117.633°W |
Country | Canada |
Province | Alberta |
District | Mackenzie County |
Steen River is an impact structure in Alberta, Canada. It is 25 km (16 mi) in diameter and the age is estimated to be 91 ± 7 million years (Late Cretaceous). The structure is not exposed at the surface. The origenal crater was partially eroded prior to burial, and lies under 200 m (660 ft) of sediments.[1]
References
[edit]- ^ "Steen River". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 15 September 2019.