Tag: rivers, coasts and glaciation

Denudation is the process of lowering and leveling of the earth surface by gradual breaking and wearing away of such earth’s features. The agents which promote these breaking and lowering of the earth’s surface are called the agents of denudation.  Examples of agents of denudation are wind, running water, ice and waves.

Runoff, streams, and rivers carry sediment to the oceans. The sediment in ocean water acts like sandpaper. Over time, they erode the shore. The bigger the waves are and the more sediment they carry the more erosion they cause and form from wave erosion.

Ox bow lake are formed by the erosional work of river.

When weathered particles move down due to gravity alone, the process is called mass movement. Mass movement occur in two ways; it is rapid on sleeper slopes while it is slower on gentle slopes.

Like weathering and mass movements, erosion is also an external process. Erosion occurs through various agents. Wind, running water, glaciers, sea water and groundwater.

When weathered materials move very rapidly and come down the slope it is called rapid mass movement. The main reason of rapid mass movement are:-

• Rockfalls
• Landslides
• Land subsidence

When weathered particles move down due to gravity alone, the process is called mass movement. Mass movement occur in two ways; it is rapid on sleeper slopes while it is slower on gentle slopes.

When the weathered materials do not move downward but sink "in situ", this is called slumping. Such rapid mass movements may also occur beccause of earthquakes.

In periglacial regions along the slopes, small layers of soil accumulate because of the movement of soil. This is called solifluction.

When weathered particles move down due to gravity alone, the process is called mass movement. Mass movement occur in two ways; it is rapid on sleeper slopes while it is slower on gentle slopes.