Question

The number of hinge(s) in a monocline is _______.

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

The Correct Option is C

To solve this question, we need to understand what a monocline is and determine the number of hinges associated with it.

Definition of Monocline: A monocline is a type of fold in geology where the rock layers are inclined in one direction, forming a step-like structure. It is a simple bend in the rock strata that makes the strata dip uniformly in one direction.

Characteristics of a Monocline:

• Monoclines are formed due to differential compaction over underlying structures, such as faults or varied lithologies.
• The structure typically consists of two limbs, with one steeper than the other, and a bend or hinge between them.

Understanding Hinge in a Fold:

• A hinge is a line where the curvature of the fold is greatest. Essentially, it is the transitional zone between two limbs of the fold.
• In a traditional fold, the area where the curve changes direction is termed a hinge.

Number of Hinges in a Monocline:

• In a monocline, the rock layers bend only once, resulting in the formation of two hinges. This is due to the step-like structure where it dips down steeply in one area and rises back, creating a full loop of bending across two zones.

Thus, a monocline typically has 2 hinges.

Conclusion and Answer:

The correct answer is 2 hinges, as a monocline consists of a single fold with two limbs and two bends, each forming a hinge.