Sun & the hammering of sea swells wear away at the rugged icebergs.
The sculpted rocks and sorted cobblestones are also products of the seas persistance.
The calving of 10,000 year old Greenland glaciers
creates a flow of large icebergs that cross the North Atlantic to be swept by the tides of the Labrador current onto rocky shoals along the islands NE coast. Occasional strong NE breezes push the icebergs into the deep bays and inlets to be grounded and smashed against the rocks.