There are amazing new maps of Greenland on the GEUS web site, allowing landscape analyses on a much more sophisticated scale than before. Here is the main link:
This version has a small amount of shading
There's enough detail in there to fill a glacial geomorphology textbook!
In 1962 four of us kayaked up Nordvestfjord, on the left, reputed to be the biggest fjord in the world, and fashioned over many different glaciations. The cliffs to the left of centre are 1200m high -- that's almost 4,000 ft high, and 500 ft higher than the summit of Snowdon / Yr Wyddfa. We named the cliffs Hells Bells, and when we paddled beneath them, up the fjord and back again, we were scared to death. There were occasional boulders crashing down into the sea from enormous height, so we dared not keep too close inshore. There was nowhere to go ashore if we had got into trouble. Anyway, we survived. Happy days........
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