Transportation and Deposition of Rocks Upsc

Transportation and Deposition of Rocks

Erosion is a natural process by the top layer of soil, rock or material on the surface of earth is removed by transported to another location by means of water, wind etc.

Weathering is an important process, which is part of erosion where is helps in break down of rock into small debris and it does not involve in the movement of the materials.

Erosion is the removal, or transportation process, which involves the acquisition and transportation of rock debris.

Transportation and Deposition of Rocks Upsc
Transportation and Deposition of Rocks Upsc By Michael C. Rygel – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=12622448

Role of Geomorphic Agents in Erosion

Depending upon the dynamics of the Geomorphic Agents such as water, glacier, waves, wind, groundwater etc the massive rocks are weathered, that is break up of rocks into smaller fragments or debris.

Abrasion by the rock debris is carried by the Geomorphic agents such as water, glacier, waves, wind etc, and also helps greatly in erosion, transportation and deposition of Rocks.

The erosion degrades the Reliefs and by that, the landscapes are worn down. This makes us understand that weathering helps erosion but it is not a precondition for the erosion to takes places.

The degradational processes include Mass Wasting, Erosion and Weathering. The earth surface undergoes continuous changes and the main reason behind it is Erosion.

Kinetic Energy in Transportation and Deposition of Rocksand deposition of Rocks

Kinetic energy controls denudational processes such as transportation and erosion.

Wind, Water, Glacier, Waves etc brings the earth material by erosion and transportation.

The Geomorphic agent’s such as Wind, Running Water and Glacier are controlled by Climatic conditions. The wind represents the Gaseous form, Running represents the liquid form and glacier represents the solid forms respectively.

Erosion is defined as the application of the kinetic energy related to the agent to the surface of the land along with its moves K.E. = 1/2 m v2.

Therefore the energy is available to perform work depends on the mass of the material and the velocity with which it is moving.

Even though the Glacier move very slow, it is more effective than other agents of erosion such as wind. This is because Glacier has tremendous mass and wind is less effective at it is in a gaseous state.

The other two erosional agent such as the waves and the groundwater is not controlled by the climate.

The erosional work of the groundwater is determined much by the lithological character of the region and the work of wave is along the coastal region and it happens along with the interface of lithosphere and hydrosphere.

The Karst topography develops only when the rock is permeable and solution and also there is the availability of water.

The erosional agent’s losses its velocity and thereby the energy on the gentle slopes and material carried by the erosional agents start to settle themselves and it means that the deposition is not actually the work of any agent.

The coarser materials get deposited first and then the finer ones. The depression gets filled up by deposition.

The same erosional agents viz. running water, glaciers, wind, waves, and groundwater also act as aggradational or depositional agents.

FAQ

  1. Which is the gaseous agent of erosion?

Wind is the Gaseous agent of Erosion.

2. why are glaciers such effective agents of erosion and deposition?

This is because Glacier spread out over the surface of land, as it grow and changes the shape of the land. Also they scrape away the surface, erode the rock and its sediment.

The glacier also carry the sediments to one place to another place. Therefore glacier are one of most effective agents of erosion and deposition.

* * All the Notes in this blog, are referred from Tamil Nadu State Board Books and Samacheer Kalvi Books. Kindly check with the original Tamil Nadu state board books and Ncert Books.
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