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.
Landforms of fluvial erosion and deposition. Oxbow lakes and meanders are found in the middle course of the river (long profile) and are formed as a result if erosion and deposition. The formation of meanders leads eventually to the development of oxbow lakesVideo showing the features of the middle course of the River Tay -. http://www.bbc.co ....