21. It may be formed either by wind erosion or by dunal encroachment on an existing wetland. 22. However, over the centuries the structures suffered damage from rain and wind erosion and inadequate maintenance. 23. Farmland is typically very susceptible to wind erosion . 24. In these ways wind erosion can be controlled. 25. Water and wind erosion have created several unusual formations that are only found in similar climates. 26. It is generally considered that these are, in fact, completely natural, being produced by wind erosion . 27. Schoch states that wind erosion forms distinctive horizontal bands, whereas the water erosion features are clearly vertical. 28. In arid areas, wind erosion ( eolian erosion ) can be an important factor in rockhouse formation. 29. By 1919, Montana suffered from wind erosion and drought, and the opportunities for repairing farm equipment dwindled. 30. Wind erosion had exposed a small number of artifacts on the bulldozed surface of the parking lot.
