Look & Lay of the Land
If we viewed the island from the air, we would notice north and south aligned gouges scooped out of the land as if by a very large hand. In this case, the hand was a huge, slow moving, continental glacier over a mile high. When this giant glacier finally melted and retreated, it left rounded and bare mountain tops, elongated ponds and lakes, many boulders, and the seven mile long Somes Sound. (Once designated a fjord, now, more accurately called a fjard.)
A good place to see the impact that these enormous glaciers had on the land is in the distinctive teardrop shape of Sheep Porcupine Island, located offshore to the northeast of Bar Harbor. Mount Desert Island's own Cadillac Mountain owes it rounded summit to this as well. Even after being sheared off by the glaciers, it remains the highest point along the North Atlantic Seaboard at 1,530 feet (466.34m) above sea level.