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|Coordinates||Lat. N 43°19' Long.W 91°46'|
|Age Ma or date||470.0|
|Remarks|| A 5.5 km wide impact structure found below younger sediments. There is a deposit of younger shales inside the impact structure and below shale there is breccias where planar deformation features has been found proving this impact structure.|
Added 6 March 2013.
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