Steen River crater

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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 (Lower Cretaceous). The crater is not exposed at the surface. The crater was partially eroded prior to burial, and lies under 200 m (660 ft) of sediments.[1]


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Coordinates: 59°30′N 117°38′W / 59.500°N 117.633°W / 59.500; -117.633 (Steen River crater)