History: Central Park In The Early 1900s, Manhattan, New York City, United States

Manhattan schist and Hartland schist were formed in the Iapetus Ocean during the Taconic orogeny in the Paleozoic era, about 450 million years ago. During this period the tectonic plates began to move toward each other, which resulted in the creation of the supercontinent, Pangaea.
Cameron's Line is a fault zone that traverses Central Park on an east-west axis.
Various glaciers have covered the area of Central Park in the past, with the most recent being the Wisconsin glacier which receded about 12,000 years ago. Evidence of past glaciers are visible throughout the park in the form of glacial erratics (large boulders dropped by the receding glacier) and north-south glacial striations visible on stone outcroppings.