Closely related to pediment like surfaces are large terraces carved in bedrock. They usually occupy higher elevations in the landscape. Other terms used to describe these features are goletz terraces, altiplanation terraces, Nivation terraces and equiplanation terraces. These slope profiles occur mainly in the unglaciated regions of northern North America, Russia, but have also been recognized in South America. Cryoplanation Terraces vary in form; they may be sickle-like or elongated and relatively narrow in shape. Their dimensions also vary; the smallest may be less than 50 m in maximum dimensions while others exceed 400-600 m in length.