Maharashtra BoardEnglish MediumSTD 11 Commerce / ArtsGeographyEarth Movements4 Marks
Question
Folding
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Answer
Folding occurs when compressional forces are applied to rocks that are ductile or flexible.
Rocks that lie deep within the crust and are therefore under high pressure are generally ductile and particularly susceptible to folding without breaking.
As a result, rocks deep within the crust typically fold rather than break.
Folding is also likely to occurs where compressional forces are applied slowly.
Folding results into formation of fold mountains e.g., the Himalayas, the Alps etc.
There are different parts of folds – limbs, axis of fold, Anticline, syncline, axial plane.
There are different types of fold formed on basis of inclination of limbs – symmetrical fold, asymmetrical fold, overturned fold, recumbent fold and isoclinal fold.
The nature of fold depends on several factors like, the nature of rocks, the nature and intensity of compressive forces, duration of the operation of compressive forces, etc.
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