State two conditions necessary for the formation of a delta.

Answer:

-Large quantities of silt/sediments are carried/deposited at the river mouth.
-Low velocity of the river at the mouth/gentle slope at the river mouth.
-Weak sea waves/weak tidal currents at the coast/at the
river mouth.
-A shallow continental/shelf/shore/aro und the river mouth.
-High rate of deposition than the rate of removal of silt at the river mouth.

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