I’ve recently exhausted a number of books on Polar exploration. Almost all these books have a handy map of the Arctic Ocean with a dotted line that shows the extent of the permanent ice cap. As far as I can tell, the only pieces of permanently ice locked land are the De Long Islands (named for an American who had the good fortune to die there) off the north shore of Siberia.
My understanding is that the ice cap is always moving, actually rotating, within the basin created by the north coasts of Eurasia, North America and Greenland. If this is so, how come these islands haven’t been obliterated by the constant ice shift? Shouldn’t thousands of years of abrasion have shaved off the above water portion of any land within the permanent ice cap?