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Coastal Landform

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What is Coastal Landform?

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Coastal landforms are any of the relief features which are there along any coast.  This is the result of the combination of processes, sediments, and also the geological structure on the coast itself. 

The coastal environment of the world is processed with a wide variety of landforms that are manifested in a spectrum of sizes and different shapes which ranges from the gently sloping beaches to the high towering cliffs. The coastal landforms are best considering the two broad categories: erosional and depositional. 


Name Some Coastal Landforms

The different types of Coastal Landforms are as follows:

Among the Erosional Coastal landform types:

Sea Cliffs 

These are the most widespread landforms which are formed due to the erosional coasts. The coastal landforms range from very steep to vertical bedrock cliffs which are only a few metres high to hundreds of metres above sea level. 

Wave Cut Platform 

At the base of most cliffs also along the rocky coast, one can find a flat structure on the mid-tide elevation. This structure is like a benchlike feature which is called a wave-cut platform. These surfaces may range from a few metres to hundreds of metres wide.

Sea Stacks

Erosion which might occur along the rocky coasts at various rates is dependent both on the rock type and on the wave energy at this particular site.

Sea Arches

Yet another spectacular type of erosional landform is this sea arch, which forms as the result of different rates of erosion generally because of the varied resistance of bedrock. 


Marine Landforms 

To understand Marine Landform, we can study the various points:

  • The sea waves are aided by the winds, by the currents, and the tides. The storms carry on the erosional and depositional processes to form these landforms.

  • The erosion process at the sea depends upon the size and the strength of the waves, slope, height of the shore which is between the low and the high tides, and the shape of the coast, the composition of rocks, depth of the water, human activity etc.

  • The wave pressure compresses in the air that is trapped inside the rock fissures, joints, faults, etc. which, in turn, forces the air to expand and to rupture and break the rocks at their weak points. 

  • Waves also use rock debris as a means of erosion. These rock fragments that are carried between the waves themselves get worn down.

  • The solvent or the chemical action of these waves is another mode of erosion process. 

Coastal Features

The coast is the strip of land that meets an ocean or the sea. Coasts have many different features like caves and cliffs, beaches and mudflats. The Tides, waves, and water currents shape the land to form the coastal features.

 

Coastal Depositional Landforms 

The landforms of the Coastal Deposition occur when the sea drops or deposits the material. This phenomenon includes sand, sediment and the shingle which results in the formation of landforms of coastal deposition.


Coastal Processes and Landforms 

The landforms which develop and stay along the coast are the result of a combination of the processes which acts upon the sediments and the rocks that are present in the coastal zone. Among the most prominent of these processes involves the waves and the currents which are being generated along with the tides.


Features of Coastal Deposition 

Features of coastal deposition are the features of deposition that are found in the coastal areas between the high and low tide. This is normally found in those areas where there is an inlet or a sheltered area, between the headlands or a change in the coastline that causes the sediment to be trapped and to build up.


Beach Landform

The beach is the general that area is between the lowest spring tide level and between the point reached by the storm waves in the highest tides. Every other beach is different but all are usually made up of material that is deposited on the wave-cut platform. These beaches are formed from sand, sand and the shingle, also known as the pebbles. They also can be formed from the processing of the mud and silt.

FAQ (Frequently Asked Questions)

1. What is a Coast?

Ans. A coast is that land which is situated along the seaside. The border or the boundary of the coast is where the land meets the water, this is known as the coastline. The waves, tides, and currents help to create these coastlines. The way the coasts are formed depends a lot on what kind of material the land and water are basically.

2. What are Cliffs?

Ans. Cliffs are the highest peak or summit of a formation. Cliffs are usually formed due to the processes of erosion and weathering of the rocks. Weathering occurs due to natural events, like the wind or rain, which break up the pieces of rock. In the coastal areas, the strong winds and the powerful waves break off the soft or grainy rocks from these harder rocks. These harder rocks which are left, are known as cliffs.

3. What is Rock Debris?

Ans. Rock debris is the garbage or the discarded wastes or trash, these are the scattered remains of destroyed large rocks that are left by a melting glacier.