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Coasts


What are coasts?

 

Coasts are place where the land meets the oceans and seas. (If a country has the sea as its neighbour that country has a coast)

 

A picture of a headland at London Bridge aka London Arch on Great Ocean Road, Victoria, Australia.

Coasts

 

Coasts Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Coasts

 

Places on the coast

 

The world has about 320,000 km of coastlineThe British Isles has about 14,000 km of coastline.

 

Some of the famous coasts in the world are listed below.

 

  • Mississippi’s crooked Coastline
  • California’s long Coastline
  • New Jersey’s Coast (Jersey Shore)
  • Europe’s Coastline
  • Florida’s Coastline

 

The seashore

 

What is the seashore?

 

The seashore is the boundary between the land and the sea. This boundary is also called the shore or the shoreline.

 

Coasts Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Seashore

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Seashore

 

Landforms at the seashore

 

Landforms are natural physical features of the Earth’s surface such as mountains, rocks, sand dune, valleys etc.

 
Examples for landforms at the seashore
 

  • Sandy beaches
  • Rocky cliffs
  • Tide pools (also called tidal pools)
  • Coral reefs

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Sandy Beaches

 

Loch Ard Gorge on Great Ocean Road, Victoria, Australia

Rocky Cliffs

 

Coasts Shelly Beach Cronulla NSW Australia

Tidal Pools

 

Coasts Shelly Beach Cronulla NSW Australia

Tidal Pools

 

Coasts Shelly Beach Cronulla NSW Australia

Man-made Tidal Pool

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Underwater Corals

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Limestone Coast

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Limestone Coast

 

Also read the lesson Coastal Landforms to learn more about landforms at the seashore.

 

How are these landforms formed?

 

Each of these landforms is shaped by the wind, waves, tides, and currents.

 

Loch Ard Gorge on Great Ocean Road, Victoria, Australia

Coastal landforms are shaped by the wind, waves, tides, and currents

 

Unawatuna Beach, Galle, Sri Lanka

Wind, waves, tides, and currents shape coastal landforms

 

 

How are these landforms useful?

 

1)    These landforms yield (give way) a variety of habitats, or environments for plants and animals.
2)    Some of these landforms such as coral reefs prevent sea waves coming into the land.

 

Coasts Shelly Beach Cronulla NSW Australia

Sea Waves

 

Unawatuna Beach, Galle, Sri Lanka

Sea Waves

 

 

The beach

 

What is a beach?

 

The beach is a gently sloping strip (narrow piece) of land bordering an ocean or other body of water.

 

Unawatuna Beach, Galle, Sri Lanka

Beaches

 

Unawatuna Beach, Galle, Sri Lanka

Sunset at the beach

 

How are beaches formed?

 

Beaches are formed by the action of rivers, waves, currents, tides, and wind and they are usually covered with sand, shingle (gravel) or pebbles.

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

Beaches are formed by the action of rivers, waves, currents, tides, and wind

 

Changing coastlines

 

Beaches change shape from day to day and season to season. Waves, tides, currents, and the wind sometimes broaden a beach by depositing sand and sometimes narrow a beach by carrying sand away.

 

Nilaveli Beach Trincomalee Sri Lanka

Beaches change shape from day to day and season to season

 

How is a new land formed?

 

A new land is formed by tiny pieces of rock that the water has carried from the other parts of the coast. Tiny pieces of mud and sand are swept along by the river and gradually settle on the bottom as the river’s current is slowed by the incoming waves of the sea. Over many years, the particles form large areas called mudflats. Eventually, these may form new land.

 

Coastal View Great Ocean Road, Victoria, Australia

 

Why are coasts important?

 

1)    To enjoy holidays, sports and leisure activities

2)    To make ports for ships and fishing boats

3)    To get fish and other seafood

4)    To get salt, oil and natural gas

 

Nilaveli Beach Hotel Pigeon Island Trincomalee Sri Lanka

To enjoy holidays, sports and leisure activities

 

Mt. Lavinia Beach Galkissa Colombo Sri Lanka

To enjoy holidays, sports and leisure activities

 

Mirissa Whale Watching Sri Lanka

To make ports for ships and fishing boats

 

Kinniya Bridge Trincomalee Sri Lanka

Fishing

 

Human effects on the seashore

 
1)    For several human activities

E.g.  – Recreation (leisure activities), waste disposal, shipping, commercial fishing etc.

 

2)    The residential development

 

3)    The industrial development

 

Sydney Habour Bridge

Industrial Development along the coast

 

Coasts Shelly Beach Cronulla NSW Australia

Residential development along the coast

 

Sydney Habour Bridge Opera House

Industrial Development along the coast

 

Sydney Habour Bridge

Industrial Development along the coast

 

Sydney Habour Bridge

Industrial Development along the coast

 

Sydney Habour Bridge

Industrial Development along the coast

 

Sydney Habour Bridge

Industrial Development along the coast