The Grand Canyon

You've been told in every science class that canyons are created because of tectonic activity, river movements, or erosion, and that's true for the most part. Naturally, people assume that the Grand Canyon was made this way, however that's far from the truth.
Sometimes a heart can break so much that it creates a crack on the earth. One heart can create a mile long crack, deep enough to fit the Eiffel Tower. So just what kind of damage could an entire town of broken hearts do?

Warning: some swearing