The four pictures illustrate the changes that can take place in the appearance of a headland as a result of coastal erosion. A headland is a cliff or large rock that extends into the sea.
First of all, it is hard, but over time, the movement of the seawater can wear away a weak part at the base of the rock, to form a small hollow or cave. In high tide, the water may reach halfway up the headland and gradually the motion of the waves can widen the cave, turning it into an arch. Durdle Door in Dorset is an example of this type of erosion.
As the water continually beats against the arch, it can weaken the top part, which eventually collapses, leaves an isolated piece of rock called a ‘stuck’. Over time, the stack also wears away to form a ‘stamp’. Meanwhile, more caves may develop along the base of the headland, and additional arches and can create.
The diagram clearly shows how the continual process of erosion, with the formation of caves, arches and stumps of rock, contributes to the eventual withdrawal(withdraw) of a headland.
The four pictures illustrate the
changes
that can take place in the appearance of a headland
as a result
of coastal erosion. A headland is a cliff or large
rock
that extends into the sea.
First of all
, it is
hard
,
but
over time, the movement of the seawater can wear away a weak part at the base of the
rock
, to form a
small
hollow or
cave
. In high tide, the water may reach halfway up the headland and
gradually
the motion of the waves can widen the
cave
, turning it into an arch.
Durdle
Door in Dorset is an example of this type of erosion.
As the water
continually
beats against the arch, it can weaken the top part, which
eventually
collapses,
leaves
an isolated piece of
rock
called a ‘stuck’. Over time, the stack
also
wears away to form a ‘stamp’. Meanwhile, more
caves
may develop along the base of the headland, and additional
arches
and can create.
The diagram
clearly
shows
how the continual process of erosion, with the formation of
caves
,
arches
and stumps of
rock
, contributes to the eventual withdrawal(withdraw) of a headland.