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.
4 Agents of Erosion and Deposition: Water, Wind, Gravity, and Glaciers Water Streams Young Streams steep slopes, fast moving, rapids, waterfalls, creates valleys Mature Streams gentler slopes, meanders (bends) are created Old Streams flat land, moves slower, meanders grow over time