What does the two sides of fold called?

What does the two sides of fold called?

Figures 10.10 & 10.11: The two sides of a fold are referred to as limbs. The two limbs come together to form an imaginary line called the fold axis. The direction in which the fold axis points indicates the strike of the fold.

What are the two types of fold?

A symmetrical fold is one in which the axial plane is vertical. An asymmetrical fold is one in which the axial plane is inclined. An overturned fold, or overfold, has the axial plane inclined to such an extent that the strata on one limb are overturned.

What are the four types of fold?

Types of Folds

  • Anticline: linear, strata normally dip away from axial center, oldest strata in center.
  • Syncline: linear, strata normally dip toward axial center, youngest strata in center.
  • Antiform: linear, strata dip away from axial center, age unknown, or inverted.

How folds and faults are formed?

When the Earth’s crust is pushed together via compression forces, it can experience geological processes called folding and faulting. Folding occurs when the Earth’s crust bends away from a flat surface. Faulting happens when the Earth’s crust completely breaks and slides past each other.

How do you tell if a fold is overturned?

So: if you have a steeply-dipping bed cut by more-shallowly-dipping cleavage, pay attention to the direction of the cleavage’s dip: (a) If it is dipping in the opposite direction as bedding, your fold is upright or asymmetric. (b) If your bedding and cleavage are dipping in the same direction, your fold is overturned.

What is difference between fault and fold?

FOLD: Permanent wavelike deformation in layered rock or sediment. FAULT: A fracture in bedrock along which rocks on one side have moved relative to the other side.

When is the fold axis not horizontal it is called plunge?

If the fold axis is not horizontal, the angle of the axis with the horizontal plane is called plunge. anticline upfolds or arches of rock layers syncline downfolds or troughs of rock layers. symmetrical fold the axial plane is vertical with the

What does the word fold mean in Greek?

In Greek it means opposite inclined. In this fold the limbs dip always from each other. Syncline is simple fold, which is concave upwards. In Greek it means together inclined. In this fold the limbs dip towards each other. The axial plane is vertical. The axial plane is inclined. The axial plane is vertical. The axial plane is inclined 5.

Which is the correct definition of a recumbent fold?

Recumbent Fold: A fold in which the axial plane is absolutely horizontal and the limbs are also more or less horizontal is called Recumbent Fold as in the accompanying Fig. 4.12. 9. Drag Fold:

Which is the best description of a fold?

Folding changes upwards or downwards as shown in figure. At the top folding is in the form of a simple anticline and passes to an overturned fold and still at more depth folding disappears. 5. Suprataneous Folding: When folding and sedimentation are contemporaneous suprataneous folding is formed.

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