- Beaches are formed through deposition of sand and pebbles in sheltered bays by waves that have refracted around the bay and lost energy. Ridges called berms form along beaches and show high tide marks. - Spits form when longshore drift carries sediment along a coastline. When the coastline changes direction, the water deposits the material, forming a long ridge called a spit. Hooked ends can develop from seasonal wind changes. Salt marshes often form behind spits. - Bars can form when a spit builds across a bay and connects two headlands, blocking water flow like at Slapton Ley in Devon.

1. Depositional Coastal
Landforms
Depositional Landforms

2. Depositional Landforms (p154)
• Video here
• Three main features;
– Beachs
– Spits
– Bars
Depositional Landforms

3. Beaches – Depositional feature
Depositional Landforms

4. 1. Beaches – wave refraction
Depositional Landforms

5. Beaches – Berms and ridges
These show high tide marks
Depositional Landforms

6. 1. Beaches
• 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
Shingle Refract
• ______ beaches also form when ______ are eroded
by high _______ waves. Ridges or ______ form along
these beaches, showing high tide marks
Cliffs Energy Pebble Berms Tide
Depositional Landforms

7. 2. Spits
• Video here Spits (from 2.00)

12. 2. Spits
• 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
Depositional Landforms

13. Annotate your map!
Fetch - direction of prevailing winds
(and therefore waves) in approaching
the beach.
Direction of
Long-Shore
Drift.
Short term changes in wind and
wave direction causing the curved
ends to the spit.
Original
Coastline
Salt
Marsh
Fastest current at the
centre of the river.
River
Estuary

14. Depositional Landforms

15. Bars
Depositional Landforms

16. 3. Bars
Depositional Landforms

17. 3. Bars
• If a spit develops across a bay, it may
build across the two headlands to
create a bar. E.g. Slapton Ley in Devon.
Depositional Landforms

18. Playdoh features!
• Now its your turn to design some of
these features!
• Start of designing erosional features
(cave, arch, stack, stump) and then
have a go at depositional features
• Here are some examples …
Depositional Landforms

19. You say we pay
• Arch
• Spit
• Swash
• Erosion
• Long shore drift
Depositional Landforms

20. You say we pay
• Stack
• Headland
• Backwash
• Transportation
• Hydraulic Action
Depositional Landforms