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.
A fluvioglacial landform created by both erosion and deposition by melt water is a Sandur or outwash plain that often has braided streams. Outwash plains are areas that may have been glaciated by ice sheets and then affected by melt water or they may be areas in front of the snout.