Reply #7: Brown is high elevations

[Ediacara]

This map doesn't color Greenland correctly. Almost all of the elevation of Greenland is due to glacial ice. With the ice gone, what remains is a big C-shaped island with an immense central gulf communicating with Baffin Bay to the west (The ice is so heavy, it's caused the land to sink down below sea level and it will take several tens of thousands of years for it to rebound).