How is cuspate delta formed?

I assume you mean river deltas. They are an accumulation of soil deposits from the river. The river picks up certain amounts of soil as the water travels down its length and once it empties into a...

A delta is formed when water flows from a river into an ocean, the water velocity slows down. This reduction in velocity and so energy reduces the capacity of the water to transport suspended load....

A cuspate delta is a delta formed when a river drops sediment onto a straight shoreline with strong waves. Waves force the sediment to spread outwards in both directions from the river's mouth,...

Basic geologic erosion. It rains in the mountains and the water runs downhill until it reaches the ocean, it carries with it boulders, rocks, gravel, sand, soil, plants, debris and trees in varying...

Where a river which transmits a great deal of material arrives at the sea and there is little tidal range a delta will form. Example the Nile into the Mediterranean or the Mississippi into the Gulf...