“I mean, we’re talking Arcturian megatons of snow and ice. “
A bigger question is, how did those three guys do it?
Well, they didn't. That's McCready, Fuchs and the Doc from the American station. The Norwegians discovered the spacecraft and presumably excavated it. We know it wasn't a recent crash because in the film Doc states that based on the depth, it has been in the ice for about 100,000 years. So...that means it was buried.