Hudson Palisades in the context of "Hudson Waterfront"

Trap rock, also known as either trapp or trap, is any dark-colored, fine-grained, non-granitic intrusive or extrusive igneous rock. Types of trap rock include basalt, peridotite, diabase, and gabbro. Trap is also used to refer to flood (plateau) basalts, such as the Deccan Traps and Siberian Traps. The erosion of trap rock created by the stacking of successive lava flows often creates a distinct stairstep landscape from which the term trap was derived from the Swedish word trappa, which means "stairs".

The slow cooling of magma either as a sill or as a thick lava flow sometimes creates systematic vertical fractures within the resulting layer of trap rock. These fractures often form rock columns that are typically hexagonal but could be four- to eight-sided.

Weehawken is a township in the northern part of Hudson County, in the U.S. state of New Jersey. It is located on the Hudson Waterfront and Hudson Palisades overlooking the Hudson River. As of the 2020 United States census, the township's population was 17,197, an increase of 4,643 (+37.0%) from the 2010 census count of 12,554, which in turn reflected a decline of 947 (−7.0%) from the 13,501 counted in the 2000 census.