|Map: Ron Blakey|
The ice crushes everything that is in the way, carrying the self-made debris over long distances, using it as grinding material when it cuts into higher areas to make fjords, or just drop it somewhere else, where we find it today as moraine, sander or one of the impressive erratic blocks that are spread out over northern Europe.
When the ice finally retreated, enormous amounts of water were released and filled a shallow basin that had opened right on top of the weakness zone that once was the big fault line, scooped out by the passing ice - the Baltic sea. Please do not take "sea" in the same meaning as "ocean", for this basin contained nothing but meltwater, no salt whatsoever. Only very late, about 9000 years ago (which is practically today after lunch, in geological terms), a tiny connection opened up towards the North Atlantik, bringing in small amounts of salt water, flowing around Denmark.
Oh, yes, and then there was the fashion show at night...