Definition: Apexes are large, segmented landforms formed by the sedimentation of rivers and streams in various landscapes worldwide. Apexes are distinct from mountain peaks where the earth's crust meets with a tectonic plate or a volcano vent, creating narrow valleys. Their presence is often associated with waterfalls, caves, or rocky outcroppings. This term originates from the Greek word "apex" which means "from top," meaning they're formed at an elevation above sea level.