Tag: external forces - responsible for changes

Moraines is any glacially formed accumulation of unconsolidated glacial debris that occus in both currently and formerly glaciated regions on the earth. These are formed of the debris of glaciers. They are not formed due to river erosions.

Alluvial soil is considered the most fertile and useful soil for agriculture in India due to its high nutrient content and ability to support a wide range of crops.

Deforestation removes the protective cover of vegetation, leaving the soil exposed to wind and water, which is the primary driver of soil erosion.

Deforestation is a cause of soil erosion, not a result of it. The other options (siltation, reduced water percolation, and loss of fertility) are direct consequences of the erosion process.

Running water, wind, and the sea (waves) are natural agents that physically transport soil. Industries are a human activity, not a natural agent of erosion.

In the Kambam valley of Tamil Nadu, the specific climatic and geographical conditions make wind erosion a common and significant issue.

The glaciers carry sediments with them. These sediments are called moraines. Depending on the location of the deposits, moraines can be divided into four type.

The depositional work of glacier produces landforms like:-

• Drumlins
• Eskers

The eroded materials gets carried away by agents like running water, glaciers, wind, sea waves and groundwater. These all work on erosion, transportation and deposition of eroded materials.

The erosional work of glaciers produces landforms like:-

• Cirques
• Horns
• Hanging valleys
• Sheepbacks