{"id":6555,"date":"2021-10-05T13:13:01","date_gmt":"2021-10-05T07:43:01","guid":{"rendered":"https:\/\/www.goseeko.com\/blog\/?p=5884"},"modified":"2025-11-02T21:14:16","modified_gmt":"2025-11-02T15:44:16","slug":"what-is-folds","status":"publish","type":"post","link":"https:\/\/www.goseeko.com\/blog\/what-is-folds\/","title":{"rendered":"What is Folds?"},"content":{"rendered":"\n

Folds when crustal rocks are subjected to stress over a period of time, they compress and form folds. These compressed beds appear like undulations, showing sharp bends and curvatures.<\/p>\n\n\n\n

Thus the final form and extent of a fold will depend on the rock type, direction, magnitude and duration of stress acting on it.<\/p>\n\n\n\n

Therefore as the applied stress increases these beds form anticlines, syncline, isoclines and recumbent fold. Further stress will lead to overturned folds.<\/p>\n\n\n\n

Parts of a fold:<\/strong><\/h2>\n\n\n\n

The number of terms used to describe the morphology or shape of a fold. Some of the most common terms are:<\/p>\n\n\n\n

1. Limns of folds<\/strong><\/p>\n\n\n\n

A simple fold has two limbs each of which lie on either side of the axial plane. In case of complex folds a middle limb will be common to the two adjacent folds.<\/p>\n\n\n\n

2. Hinge<\/strong><\/p>\n\n\n\n

It is a point of maximum curvature in the folded surface more commonly the hinge is a zone called a hinge zone. If all the points of maximum curvature are jointed the resulting line is known as a hinge line<\/p>\n\n\n\n

3. Axial plane<\/strong><\/p>\n\n\n\n

It is an imaginary plane or surface which divides a fold into two halves.<\/p>\n\n\n\n

4. Axis of fold<\/strong><\/p>\n\n\n\n

An axial of fold is defined as the line of intersection between the axial plane and the surface of any of the constituent rock beds.<\/p>\n\n\n\n

Types of folds<\/strong><\/h2>\n\n\n\n
    \n
  1. Anticline<\/li>\n\n\n\n
  2. Syncline<\/li>\n\n\n\n
  3. Symmetrical <\/li>\n\n\n\n
  4. Asymmetrical<\/li>\n\n\n\n
  5. Isoclinal <\/li>\n<\/ol>\n\n\n\n

    1. Anticline:<\/strong><\/p>\n\n\n\n

    Firstly anticlines are folded in which the limb  dip away from each other at the crest and convex upwards.<\/p>\n\n\n\n

    The shape of the anticline resembles letter A . In simple cases i.e. in the area which not so tectonically active, the older rocks occupy a position in the interior of the fold, oldest at the core of the fold.<\/p>\n\n\n\n

    2. Syncline<\/strong><\/p>\n\n\n\n

    Firstly these folds are the reserve of anticlines in all details and may be described as those folds in which the strata concave downwards . the limb of a syncline dip towards each other.<\/p>\n\n\n\n

    Younger beds occupy the central portion of the fold and the older rocks move away from the center its Lastly.<\/p>\n\n\n\n

    3. Symmetrical <\/strong><\/p>\n\n\n\n

    In symmetrical anticline and symmetrical syncline, the axial plane is vertical. The limbs being of the same length dip equally in opposite https:\/\/www.cfga.gov.mn\/<\/a> direction from the center.( hinge)<\/p>\n\n\n\n

    Interested in learning about similar topics? Here are a few hand-picked blogs for you!<\/strong><\/p>\n\n\n\n