Folding
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Landscape Folding
Transcript of Folding
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 foldAnticline
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 foldsSymmetrical fold
Asymmetrical fold
OverfoldRecumbent fold
Resultant landforms
Fold Mountains.
How are fold mountains formed?
