Steen River crater
Encyclopedia
Steen River is an impact structure
in Alberta
, Canada.
It is 25 km (15.5 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 (656.2 ft) of sediments.
Impact structure
The term impact structure is closely related to the terms impact crater or meteorite impact crater, and is used in cases where erosion or burial have destroyed or masked the original topographic feature with which we normally associate the term crater...
in Alberta
Alberta
Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...
, Canada.
It is 25 km (15.5 mi) in diameter and the age is estimated to be 91 ± 7 million years (Lower Cretaceous
Cretaceous
The Cretaceous , derived from the Latin "creta" , usually abbreviated K for its German translation Kreide , is a geologic period and system from circa to million years ago. In the geologic timescale, the Cretaceous follows the Jurassic period and is followed by the Paleogene period of the...
). The crater is not exposed at the surface. The crater was partially eroded prior to burial, and lies under 200 m (656.2 ft) of sediments.