What is the process by which a glacier loosens and moves rock?
Glaciers erode the underlying rock by abrasion and plucking. Glacial meltwater seeps into cracks of the underlying rock, the water freezes and pushes pieces of rock outward. The rock is then plucked out and carried away by the flowing ice of the moving glacier (Figure below).
Where is wind erosion the most dangerous?
While wind erosion is most common in deserts and coastal sand dunes and beaches, certain land conditions will cause wind erosion in agricultural areas. So, it is wind that drives the erosion, but it’s mainly the landscape and condition of the land which leads to the most damaging wind erosion.
Which of the following is most likely to have soil erosion?
The agents of soil erosion are the same as of other types of erosion: water, ice, wind, and gravity. Soil erosion is more likely where the ground has been disturbed by agriculture, grazing animals, logging, mining, construction, and recreational activities.
What are the factors that affect soil erosion?
The rate and magnitude of soil erosion by water is controlled by the following factors:
- Rainfall and Runoff.
- Soil Erodibility.
- Slope Gradient and Length.
- Cropping and Vegetation.
- Tillage Practices.
- Sheet Erosion.
- Rill Erosion.
- Gully Erosion.
What is the most important most influential factor in erosion?
Climate is perhaps the most influential force impacting the effect of erosion on a landscape. Climate includes precipitation and wind. Climate also includes seasonal variability, which influences the likelihood of weathered sediments being transported during a weather event such as a snowmelt, breeze, or hurricane.
What are signs of erosion?
When you are by a river look for one or more of these signs of erosion:
- Exposed tree roots.
- Cracks in the soil in a river bank.
- Clumps of grass in the river.
- The top part of the river bank overhangs.
- Brown or coloured water.
- Collapsed river bank.