On October 23rd, 2014, we updated our
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Beaches – Berms and ridges
These show high tide marks
• Beaches are where sand and _______ has been
deposited in ________ bays. Waves mirror the shape
of the bays and therefore _______ around the bay,
loosing _______ . This causes _________.
• Deposition Energy Sheltered
• ______ beaches also form when ______ are eroded
by high _______ waves. Ridges or ______ form along
these beaches, showing high tide marks
Cliffs Energy Pebble Berms Tide
• Video here Spits (from 2.00)
• Spits form when ______ _______ ______
carries sediment along a coastline. When the
coastline _____ direction , the sea deposits the
material it has been carrying because it meets a
river ____ . The change in water _____ means
that sediment is _______ and a long ridge starts
to form, a ____. At the end of the spit, seasonal
changes in wind direction can create ______
ends. The sheltered area behind a spit is where a
____ marsh develops.
• Speed Changes Deposited Spit
Mouth Salt Long Shore Drift hooked
Annotate your map!
Fetch - direction of prevailing winds
(and therefore waves) in approaching
Short term changes in wind and
wave direction causing the curved
ends to the spit.
Fastest current at the
centre of the river.
• If a spit develops across a bay, it may
build across the two headlands to
create a bar. E.g. Slapton Ley in Devon.
• Now its your turn to design some of
• Start of designing erosional features
(cave, arch, stack, stump) and then
have a go at depositional features
• Here are some examples …
You say we pay
• Long shore drift
You say we pay
• Hydraulic Action