Fold Mountains and Ocean Trenches
- Created by: WGSB Geography
- Created on: 15-03-17 11:52
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Fold Mountains
- · These are large mountain ranges where layers of rock have been compressed together
- · This can occur at both destructive and collisional plate boundaries (where two continental plates are forced together often with a shallow sea between them initially)
- · They can form as either an anticline where rock folds upwards and can result in an over fold
- · Or into a syncline where there’s a trough
Process
- 1. Sediments accumulate in shallow seas or where rivers enter an area (depression)
- 2. This creates a sea or lake of layered sediment as compression begins to take place
- 3. As the two plates move towards each other due to the convection currents in the mantle
- 4. This begins to crumple the rocks together
- 5. The rock starts to form folds which are pushed upwards as the plates collide further to form fold mountains
- 6. These mountains are then…
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