Index map
The (green) hook-shaped N-S ridge just north of New York's Long Island is a cuesta or hog-back ridge, one of several tilted and eroded lava flows in the Connecticut Valley. It is contained within coarse Triassic-Jurassic sediments that were deposited rapidly during rift-faulting of North America, about 180-200 million years ago, as the supercontinent of Pangaea was pulled apart and Europe and Africa separated from North America. When you are visiting Normandy in western France, look for the matching rocks! |
