Water Falls :

A waterfall is usually a geological formation resulting from water, often in the form of a stream, flowing over an erosion-resistant rock formation that forms a sudden break in elevation. Waterfalls may also be artificial, and they are sometimes created as garden and landscape ornament.

Some waterfalls form in mountain environments where erosion is rapid and stream courses may be subject to sudden and catastrophic change. In such cases, the waterfall may not be the end product of many years of water action over a region, but rather the result of relatively sudden geological processes such as landslides, faults or volcanic action.
     
Types of waterfalls :

Block: Water descends from a relatively wide stream or river.

Cascade: Water descends a series of rock steps.

Cataract: A large waterfall.

Fan: Water spreads horizontally as it descends while remaining in contact with bedrock.

 
 

Horsetail: Descending water maintains some contact with bedrock.

Plunge: Water descends vertically, losing contact with the bedrock surface.

Punchbowl: Water descends in a constricted form, then spreads out in a wider pool.

Segmented: Distinctly separate flows of water form as it descends.

Tiered: Water drops in a series of distinct steps or falls.

Multi-Step: A series of waterfalls one after another of roughly the same size each with its own sunken plunge pool.
 
 
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