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COASTS - Coggle Diagram
COASTS
COASTAL SPITS
1-swash moves up the beach in direction fo wind
2-backwash moves down at 90 due to gravity
3-zigzag movements along the beach:
longshore drift
4- depostion--> beach extends
5- change of wind:
hook forms
6- sheltered area:
salt marshes
form
🌊WAVES 🌊
1- 💨wind over surface of the sea🌊
--> friction swells water
2- at shore,
friction
slows at the base
top of wave breaks down
3-
size
depends on how far , strength of wind, duration of wind
4-
destructive
: storm - high - backlash strong- frequent
5-
constructive
: calm weather - long and lowe- swash stronger - infrequent
COAST STACKS
1-
hydraulic action
widens cracks in cliff
2-abrasion form
wave cut notch
between high/low tides
3-abrasion-->
cave
4-cave breaks-->
arch
5-arch collapse-->
stack
EROSION
rocks
broken
down and carried
away by seawater
Attrition
🪨 : rocks crack against each other and break
Abrasion
: rocks hit against cliff ⛰️ 🌊
hydraulic action
: air trapped in cracks of cliff
solution
: softer rock dissolved by the water e.g. Limestone
TRANSPORTATION
sea
carries
materials
1- traction
:
large
boulder roll along river bed
2-
saltation
:
small
pebbles bounce along the river bed
3-
suspension
: sediments (
fine/light
) carried along
4-
solution
: minerals
dissovled
in water and carried along
BAYS and
HEADLANDS
1-waves attack coastline
2-softer rock eroded by sea
3-resistant rock is left
3- Now more vulnerable to erosions
TYpes of weathering
💨 ❄️ 🌡️
biological
: rock broken by plants/animals
mechanical
: freeze/thaw
chemical
: acid rain
DEPOSITION
waves
drops
materials