1 Insertion â when a base is added to the sequence. 2  Deletion â when a base is deleted from the sequence.  Copy number variation (CNV) is a type of mutation where large chunks of DNA are inserted, repeated or lost. These regions of DNA can be between 10,000 and 5,000,000 bases long.
Wind deposition can result in dunes and loess deposits.
13 Mud cracks Depositional Environments on LandDepositional Environments on Land â¢ Streamsâ¢ Lakes âDelta â¢A sedimentary deposit, commonly triangle shaped, that forms where a stream enters a standing body of water âGlacierâWind â¢Eolian sediment âSediments that are carried and deposited by the wind.