Steen River is an impact structure in Alberta, Canada. It is in diameter and the age is estimated to be 91 ± 7 million years (Late Cretaceous). The crater is not exposed at the surface. The crater was partially eroded prior to burial, and lies under of sediments. References External links Exploration of the Steen River crater 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. Impact craters of Alberta Cretaceous impact craters Cretaceous Canada Mackenzie County