Wednesday, 4 April 2018

THE WORK OF SEA

THE WORK OF SEA
April 5
2018

THE EARTH CHANGING FACE
KNOWLEDES





Image result for beach groyne
Groynes are built at many beach resorts to prevent the
continual movement of sand by sea current.
Waves continually batter the shore. Large waves pick up sands and pebbles, and hurl them at cliff until the top collapses.  Wave and tides can also move beach sand and gravel.


*WHAT ARE SPITS?
Image result for spits and bars
Waves and currents transport sand, gravels and pebbles along coast. In places where the coasts change direction, the worn sand and pebbles piles up in narrow ridges called spits.


 *DOES THE SEA WEAR               AWAY THE LAND?

Waves wear away soft rocks to form bays, while harder rocks on either sides form headlands. Parts of the coast of northeast England have been warn back by 5 kilometers in the lasts 2000 years.
  
Image result for baymouth bars   *WHAT            IS              BAY
  MOUTS
    BAR ?                                                             
Some spits join one headland to another. They are called baymouth bars, because they can cut bays from the sea, turning them into enclosed lagoons.

*WHAT IS BLOWHOLE?
Image result for blowhole

Its is a hole in the rocks farmed above a sea cave. When waves enter the blowhole, sometimes causing spectacular blasts of water.


*WHAT ARE ARCHES             AND STACKS?
Image result for arches and stacks
WAVE HOLLOW OUT ARCHES (ABOVE) IN ROCKY HEADLANDS,
WHICH EVENTUALLY COLLAPSE INTO STACKS(BELOW)
Waves attack headlands from both sides, wearing away coves in the cliffs. Eventually a natural arch is formed when two caves meet. When the arch collapses, all that remains is an isolated rocks, called a stocks.