[Sherman Logan]

Doubt it. A 4k meteor would hardly be even slowed by a 2 to 3 mile thick ice sheet.

It would release energy of 3.47 x 10 to the 6th megatons of TNT. The largest H-bomb ever built was 57 megatons.

Ice isn’t going to do much to affect that.

Here’s a neat impact calculator.

http://impact.ese.ic.ac.uk/ImpactEffects/

[Jonty30]

Thank you. I got a chance to,destroy the earth, again.

[Fraxinus]

Agree and disagree about the crater. An ice sheet would have quickly obscured the surface expression of the crater due to erosion and sedimentation. I do believe that the shatter cones and other bedrock effects of the impact would still be present, several of which are quite distinct. To my knowledge none of these have been found.

[familyop]

Thanks for the calculator. At a few thousand miles away, at least a 5-mile diameter meteor would be required for coolness and a good time, IMO. [Note to self: remember crash helmet, improvised padding and bandanna for dust.] ;-)

[Smokin' Joe]

A meteor (high density material, rock and/or metal) would do significant damage to an ice sheet, to be frozen over and plowed flat by the same ice sheet.

However, the impact of a comet (lower density material) on an ice sheet might be different, especially if it broke up before it hit.