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.
Example of a Bar: Slapton Sands-Devon. TOMBOLOS Tombolos are formed where a spit continues to grow outwards joining land to an offshore island. Example of a Tombolo: - Chesil Beach-which joins the South Dorset coast to the Isle of Portland.oastal Deposition Landforms: Features and Formation. Material that is transported by the waves along a coastline is eventually deposited forming distinctive deposition features. There are four main deposition features that you need to learn the formation of. These are: 1. Beaches. 2.