This document defines and distinguishes several landforms and geographic features. It states that a plateau is a level area elevated above sea level and over 200 meters high, while mountains exceed 600 meters in elevation. Depressions are concave areas on surfaces. Beaches are accumulations of material along coastlines, and a cape is a point of land extending into a body of water. A gulf has no land within it, whereas a peninsula is connected to land on one side.