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.
Caves, Arches, Stacks and Stumps. Headlands, once formed, are exposed to the full force of the sea. As a result of wave refraction, destructive waves concentrate their energy on all three sides of the headland and so it slowly erodes overtime.In doing so, quite distinct features develop.oasts of erosion form as a result of high energy waves, large fetch, high exposure and limited deposition. They are also associated with drift alligned coasts that are influenced by longshore drift.