What a great idea, to imagine how would huge glaciers during an Ice Age would carve deep valleys. Must be a a lot of work though... I think I'll grab this and give it a go in my own conworld one of these days.

Your map is looking very good, Harrg. And it's like you say, once we get hooked on this level of detail, we love the map more and more each time we draw "a little stream" in the mountains