What is Coastline: Definition, Formation & Facts

A coastline or a seashore is the area where land meets the sea or ocean, or a line that forms the boundary between the land and the ocean or a lake. A coastline is all the places along the continents where the land meet the oceans. They include the beaches, caves, estuaries, cliffs and so on. The line where land meets water is constantly changing and reshaping.  Coastline changes with time in many ways the deposit of sediments carried by the ocean currents and rivers entering the sea, and also by the erosion by waves. Rugged and rocky coastlines are usually formed by erosion while sandy beaches, sedimentary and shallow coastlines are usually those formed from sedimentary deposits. Earth or tectonic movements can also push up new landforms or spill out new lava from nearby mountains, creating new coastal features.

Formation of coastline:

Formation of coastline

The way coasts are formed depends a lot on what kind of material is in the land and water. The coastline is constantly eroding. If there are different bands of rock along a coastline, the weaker or softer the rock, such as clay. It is eroded fastest.  Coastlines of granite, a hard rock, stay pretty stable for centuries. Cliffs that extend to the shoreline commonly have a notch cut into them where waves have battered the bedrock surface. At many coastal locations, there is a thin, narrow veneer of sediments forming a beach along the base of sea cliffs. When the sea erodes the cliffs, large rocks fall away and into the sea. These rocks are tossed about by the action of the sea and they are eroded into smaller and smaller pebbles. The pebbles are eventually ground down into the tiny grains of sand that form a beach.

The most famous coastlines:

The most famous coastlines

  1. Amalfi- Italy
  2. Cliffs of Moher- Ireland
  3. Ha long bay- Vietnam
  4. Antarctic coast- Antarctica
  5. Scottish coast- Scotland
  6. Santorini and Mykonos- Greece
  7. Atlantic ocean coast- Morocco
  8. Western coast and Lofoten Islands- Norway
  9. Icelandic coast- Iceland
  10. Krabi-Thailand

Coastlines facts: 

Coastlines facts

  1. The coastlines are not only important for human beings, but also for the animals. You can spot various animals living near the coast such as Rockhopper, sea turtles, puffins or even penguins.
  2. Some animals decide to live near the coastlines because they can scavenge the food by the sea. Thus, you can view different kinds of barnacles and sea snails here.
  3. Other animals that you can spot near the coastlines are the fish, shellfish, pelicans, seabirds, sea lions, seagulls and many more.
  4. Besides seaweed, you can also spot salt marsh, seagrasses and mangroves. All of them are important for the coastal vegetation. You can also spot sea anemones and corals. But both of them are not plants even though their lifestyle is almost similar with plants.
  5. The tourism industries near the coastlines are growing from time to time in various areas in the world. Many people visit the beach during the sunny summer season. They can do fishing, skydiving, snorkeling, boating, swimming or even surfing.

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