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.
Coastal Features. Wave action leads to the formation of many features along the coast. Some of these coastal features are formed as a result of erosion by waves whereas others are formed by the deposition of material along the coast by waves.Let us examine these coastal features in turn.ongshore drift is the process by which material is moved along the beach by wave action. This process is responsible for forming coastal features such as spits and tombolos. The video below explains the process of longshore drift.