Features of Erosion and Deposition · 2018. 9. 6. · Coastal Features Features of Erosion and...
Transcript of Features of Erosion and Deposition · 2018. 9. 6. · Coastal Features Features of Erosion and...
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Coastal Features
Features of Erosion and
Deposition
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Features of Erosion
These include
• Headlands
• Cliffs
• Caves
• Arches
• Stacks
• Stumps
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Headlands
• A headland is like a tongue of land that
projects out into the sea.
• It is formed when the sea erodes away the
softer rock, leaving behind the stronger
one.
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Headlands
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Cliffs
• Cliffs form when
the rock is very
strong.
• The stronger the
rock, the
stepper the cliff
will be.
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Cliffs
• Cliffs form when the rock face is undercut by the sea.
• This forms a notch.
• When the notch is deep enough, the cliff face will fall.
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Caves
• Sea caves will form
where the sea finds a
crack in the headland
or cliff face.
• The sea will widen
the crack till it
becomes a cave.
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Caves (Malta)
Dwejra, Gozo. This is the opening of the
Inland Sea.
Blue Grotto, Zurrieq.
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Arches
• Arches form when the cave goes from one part of the headland to the other.
• This leaves something that looks very much like a window.
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Arches Arches Arches Arches
• A famous arch
in the Maltese
Islands is “it-
Tieqa” of
Gozo.
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Stacks
• When the upper
part of the arch
falls, a column
of rock will form
in the sea.
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Stump
• When the
stack is
eroded away
by the sea, all
that remains
is a stump.
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Depositon
• Features of Deposition include
– Beaches and
– Spits.
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Beaches
• Sandy Beaches (ramliet) form where
the water is quiet enough for the
material that is carried in the water to
be deposited.
• They usually form between headlands.
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Spits
• Spits are like a
tongue of sand
and small rocks
that project out
into the sea.
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Classwork
• Make a sketch
of the following
and mark on it
the following
• Stack
• Cave
• Wave cut notch