Folding
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Folding

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    Folding Folding Presentation Transcript

    • Landscape Folding
    • What is folding?
      • Folding is the process whereby two plates collide with each other where some of the layers of rock which make up the crust buckle and form folds.
      • Basically two types of fold
        • Anticline
        • Syncline
    • Anticline
      • Happens when the layers of rocks buckle upwards to look like an inverted ‘U’
    •  
    • Syncline
      • Happens when layers of rock buckle downwards to look like a “U”
    •  
    • Types of folds
      • Symmetrical fold/simple fold
      • Asymmetrical fold
      • Overfold/Overturned fold
      • Recumbent fold
      • Overthrust fold
    • Anticline and Syncline
    • Symmetrical fold
      • A fold where both limbs are equal in steepness because compression from opposite sides is equal.
    • Asymmetrical fold
      • Happens when one limb is steeper, because compression is greater from one side than the other.
    • Overfold / Overturned Fold
      • Happens when one fold is pushed over the other limb due to increasing compression
      • Both limbs are sloping in the same direction.
    • Recumbent Fold
      • Happens when limbs are nearly parallel to each other.
      • Axis is almost horizontal
    • Overthrust Fold
      • Extremely powerful compressional forces which causes recumbent fold to fracture
      • Upper part of the recumbent fold thrust forward along the plane of fracture
    • Different folds Symmetrical fold Asymmetrical fold Overfold Recumbent fold
    • Resultant landforms
      • Fold Mountains.
      • How are fold mountains formed?