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Plate Tectonic - Coggle Diagram
Plate Tectonic
OO Divergent
Tectonic Activity
- 2 plates move away from each other
- Eg. North America plate and Eurasian plate
- As plates move away, fractures formed
- Magma rise at zone of divergence to fill gap formed between plates
- Magma cools and solidifies on earth's ocean floor (sea floor spreading)
Landforms formed
- Forms oceanic ridge
Eg. Mid-Atlantic Ridge
Forms volcanic islands
Eg. Azores
Hazards
- Earthquakes and volcanic eruption
CC Divergent
Tectonic Activity
- Plates move away and stretched to form faults
- E.g. Somali plate and Nubian plate
- Faults formed caused by tensional forces
- Magma rise to form volcano
Landforms formed
- As sections of crust extend along fault lines, central block between 2 parallel faults sinks due to tensional forces
- Rift valley formed
- Block mountains formed
- Eg. East African Rift Valley
- Eg. Mount Nyiragongo
Hazards
- Earthquakes and volcanic eruptions
OO Convergent
Tectonic Activity
- 2 plates move towards each other
Eg. Philippine plate and Pacific plate
Denser oceanic Pacific plate subducts under the less dense Philippine plate at subduction zone
- Collide and push against plates
Landforms formed
- Creates depression (oceanic trench)
Eg. Mariana Trench
- Crust of subducted Pacific plate melts and form magma
- Magma rise and form volcanic island
Eg. Mariana island
Hazard
- Earthquakes and volcanic eruptions
OC Convergent
Tectonic Activity
- Both plates converge, denser Australian plate subducts under less dense plate continental Eurasian plate
- Eg, Australian plate and continental Eurasian plate
Landforms formed
- Froms oceanic trench
Eg. Sundra Trench
- Forms fold mountains
Eg. Barisan mountains
Hazards
- Earthquakes and volcanic eruptions
CC Convergent
Tectonic activity
- Collide and push against each other, resisting subduction
- Plates break and slide along fractures in crust
- Buckle and fold
Landforms formed
- Fold mountains formed
Eg. Himalayas fold mountains
- Plateaus formed
Eg. Tibetan plateau
-
Transform plate boundary
Tectonic Activity
- 2 plates slide past each other
Eg. Eurasian plate and Anatolian plate
- No landforms occur
- Faults occur
Eg. North Anatolian plate
- Huge stress gets built up
Hazard
- Once stress is released, violent earthquake occur