Steen River impact structure

Steen River impact structure
Location within Canada
Location	Mackenzie County, Alberta, Canada 59°30′N 117°38′W
Impact crater structure
Confidence	Confirmed
Diameter	25 km (16 mi)
Age	91 ± 7 Ma Late Cretaceous
Exposed	No
Drilled	Yes

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 original crater was partially eroded prior to burial, and lies under 200 m (660 ft) of sediments.

External links

• Exploration of the Steen River impact structure

Further reading

• Niccoli, M., Hildebrand, A.R. and Lawton D.C. (2005) "Seismic Velocity Study of the Rim Uplift of the Steen River Impact Crater" Lunar and Planetary Science XXXVI.