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.
Deltas-Feature of Deposition. Deltas are features of river deposition found in the old age stage (lower course of a river). They are deposits of alluvium found at the mouth of the river where it enters the sea/lake or another river.