Bonus: Fordham Gneiss on the Harlem River Ship Canal

Part of the Fordham Gneiss (marked ‘C’ for Columbia) is visible on the Harlem River Ship Canal

The billion-year-old Fordham Gneiss, said to be the oldest bedrock feature in New York City and one of the oldest in the world, is visible from Inwood on the Harlem River Ship Canal–where it is marked with a ‘C’ for Columbia University–in Fordham, and all the way north until it reaches Van Cortland Park.

Next, discover the Top 10 Secrets of Central Park.