A Submarine ridge no further than 600 ft (one hundred eighty metres) connects the island bodily with North America. Structurally, Greenland is undoubtedly an extension with the Canadian Protect, the rough plateau from the Canadian North that is made up of difficult Precambrian rocks. See the warm magical gentle in https://directoryrelt.com/listings96195/how-visiting-greenland-can-save-you-time-stress-and-money