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.
Depositional Landforms. In areas along a coast where deposition is dominant, the shoreline is formed by the accumulation of sediment rather than by its removal. Several coastal landforms are characteristic of deposition, such as river deltas, tombolos, spits and hooks, barrier islands, sandbars, and tidal flats.