The term Palisades refers to a type of cliff or bluff. It is a geological formation consisting of steep CLIFFS or bluffs made of rock, usually formed by erosion. The term is derived from the Greek word palisade, meaning 'stake fence'. Palisades are often found along coastlines and rivers, and can be seen in many parts of the world. They are also commonly used as a natural barrier or defense. In the United States, the Palisades Interstate Park runs along the Hudson River in New York and New Jersey.