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.
Wind carried sediment falls to the ground when the wind slows down. Deposits formed by wind erosion and deposition include sand dunes and loess deposits. Sand dunes have coarse grained sediments, loess has finer sediments, both are caused by wind erosion.