Cape Cod Geology
So much about Cape Cod is special. It is no ordinary piece of terra firma. When I first looked at a map, it appeared as if the Cape had separated from the mainland, drifted a little out to sea. It’s shaped like a swimmer’s arm in mid-stroke. Actually, the Cape came about in a different way. About 10,000 years ago, after the last ice age, superglaciers slid down from the north, bulldozing huge boulders and soil particles, known as till, before it. A few large boulders can still be found on the Cape. As temperatures warmed, the ice melted, depositing its tons of debris off the southeastern coast of what is now Massachusetts. The outwash channels carved by the melting ice became the rivers that are now part of the landscape. Over years, wind and wave action ground the debris into sand. And the peninsula was born. Come set your beach chairs on our glacial beach sand.