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.
What are the types of erosion? Wind erosion is a significant force despite its limitations, altering and posing dangers to the environment. In areas such as sand dunes, wind erosion is the main force shaping the landscape, and indeed, in some deserts the landscape changes constantly. Sand grains are large enough that they are eroded in the manner of saltation, being picked up by the wind but usually redeposited relatively close by.