Earth Movements — Geography STD 11 Commerce / Arts — Question

Folding occurs when compressional forces are applied to rocks which are ductile or flexible. The different types of folds are.
Symmetrical folds:

1. The axial plane is vertical.
2. The limbs are inclined at the same angle.

Asymmetrical folds:

1. The axial plane is inclined.
2. The limbs are inclined at different angles.

Overturned fold:

1. One limb lies above the other limb.
2. Limbs slope unequally in the same direction.

Recumbent fold:

1. One Axial plane is almost horizontal.
2. One limb lies over the other in horizontal direction.

Isoclinal fold:

1. The limbs slope in the same direction with same amount.
2. The axial plane may be vertical, inclined or horizontal.
3. Slope of some portion of limbs is near vertical.