Normal Cycle of Erosion Explained
The Normal Cycle of Erosion, often referred to as the Davisian Cycle, describes the stages of landscape evolution primarily shaped by surface processes over geological time. This cycle is fundamentally linked to the action of water in its various forms.
Fluvial Erosion's Role
Fluvial erosion, which is erosion caused by rivers and streams, is the central process in the Normal Cycle of Erosion. This concept emphasizes how running water dissects landscapes, creating features like valleys, canyons, and meanders. The cycle includes stages like youth, maturity, and old age, characterized by the progressive lowering of the land surface through riverine action.
Other Erosion Types
While other forms of erosion exist, they are not the primary focus of the Normal Cycle:
- Glacial Erosion: Involves the movement of ice sheets and glaciers carving out landforms like U-shaped valleys and fjords.
- Marine Erosion: Occurs along coastlines due to the action of waves, tides, and currents, forming features like cliffs and sea stacks.
- Wind Erosion: Also known as aeolian erosion, this is significant in arid and coastal regions, shaping dunes and eroding rock surfaces through wind action.
Therefore, the Normal Cycle of Erosion is specifically associated with the processes driven by rivers.
Important Questions from Geomorphology
Which one of the following is not an igneous rock?
Which of the following statements is/are correct?
1. Hypocenter is the point on the surface of the Earth, nearest to the focus.
2. Velocity of earthquake waves is higher in denser materials.
3. P waves move faster and are the first to arrive at the surface of the Earth.
Select the correct answer using the code given below:
Which one of the following is the lowermost/innermost intrusive igneous rock?
The formation of ‘tors’ on small rocky hills is associated with which among the following?
Which one of the following statements about metamorphic rocks is not correct?
