Definition of RUMP STEAK. : a steak cut from the rump. ADVERTISEMENT. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.Note that some information is displayed differently in the Unabridged.efinition of RUMP STEAK. : a steak cut from the rump. ADVERTISEMENT. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis. Note that some information is displayed differently in the Unabridged.
At the base of a waterfall a rounded pool is found. This is called a plunge pool. The force of the falling water causes the water to swirl in the pool in a movement called eddying. As the water falls the hydraulic action may cause water to splash back against the back wall causing further erosion. This causes undercutting of the back wall. Finally the overhang of hard rock is unstable and unsupported due to undercutting. It collapses and the rocks fall into the plunge pool. Waterfalls continue to erode backwards in a process called headward erosion. This is when the hard and soft rock is all worn away and the river returns to its original slope. There are two main types of waterfall: Cataracts are large vertical falls of water and cascades are waterfalls that fall over a series of smaller steps or drops.
The three natural causes of erosion are wind, water and glaciers. In terms of carrying capacity, glaciers are capable of eroding the most, since they can carry anything from tâ¦iny grains to huge boulders.