The bedrock underlying much of Manhattan consists of three rock formations: Inwood marble, Fordham gneiss, and Manhattan schist, and is well suited for the foundations of Manhattan's skyscrapers. It is part of the Manhattan Prong physiographic region.
the bedrock underlying much of manhattan consists of three rock formations inwood marble fordham gneiss and manhattan schist and is well suited for the foundations of manhattan's skyscrapers it is part of the manhattan prong physiographic region