Why this islands eroded and other's don't?,(reply>), You may want to watch the Technical Difficulties, citation needed (from Tom Scott and friends) about Graham Island. It's explained there.,(reply>), Other islands do erode, although some have processes that add land, like volcanic activity or the way sandbars can grow over time. I would bet that Jack E Boi has hit on why this one erodes faster than others.,(reply>), Freeze-thaw erosion, constant battering by waves, but the rock may be more brittle since it’s volcanic