GEOLOGY

Detailed explanation-1: -An anticline is a fold that is convex upward, and a syncline is a fold that is concave upward. An anticlinorium is a large anticline on which minor folds are superimposed, and a synclinorium is a large syncline on which minor folds are superimposed. A symmetrical fold is one in which the axial plane is vertical.

Detailed explanation-2: -Folds can be symmetrical or asymmetrical. The former is when the fold limbs have an equal, but opposite angle of dip. Asymmetrical folds are those where one limb dips at a different amount than the other. Many folds are overturned; both limbs dip in the same direction.

Detailed explanation-3: -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.

Detailed explanation-4: -An anticline is a fold that is arched upward to form a ridge; a syncline is a fold that arches downward to form a trough (Figure ). Anticlines and synclines are usually made up of many rock units that are folded in the same pattern. The tip of a fold is called the nose.

Detailed explanation-5: -Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline).