Inwood Hill Park is a hilly, mostly forested area at the northern tip of Manhattan Island, adjacent to the Hudson River and Spuyten Duyvil Creek. The dense canopy of the forest includes large tuliptrees and red oaks. The Park also contains numerous rock outcrops that are the site of glacial potholes and small caves. The potholes were formed when rocks, carried by rapid currents from glacial meltwaters, scoured holes in the bedrock. The rock is primarily Manhattan Schist, which is about 450 million years old, and contains the minerals quartz, plagioclase, biotite, muscovite, and garnet, as well as others. The park's 196 acres also includes a small salt marsh. 136 acres of the park are protected as the Shorakapok Preserve.

The attached kmz file includes a placemark and two overlays of maps from the New York City Department of Parks and Recreation.

Inwood Hill Park
New York City Department of Parks and Recreation
Wikipedia: Inwood Hill Park
Geology of Central Park – From Rocks to Ice
Addenda to the Geology 01 Field Guide for Isham and Inwood Parks
The Burns Group: Inwood Hill Park
Forgotten New York: Inwood in the Woods
The Earth Renewal & Restoration Alliance: Inwood Hill Park
Introduction to Inwood Hill Park