Question:
Which one of the following is not the characteristic of a syncline fold?
Which one of the following is not the characteristic of a syncline fold?
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A syncline is a downward-bending (concave up) fold that looks like a trough or U-shape. Identifying its true characteristics helps spot the one statement that does not belong.
Updated On: Jun 16, 2026
- The limbs (sides) of the fold dip inward towards the central hinge or axis
- Synclines are the result of compressional forces pushing rock layers downward
- A downward-bending fold or downfold, that forms a U-shaped trough
- The oldest rocks are pushed up to the core (center)
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The Correct Option is D
Solution and Explanation
Concept:
A syncline is a downward-bending (concave up) fold that looks like a trough or U-shape. Identifying its true characteristics helps spot the one statement that does not belong.
Step 1:
Check the correct features of a syncline. Its limbs dip inward toward the central axis (true), it forms by compression that bends layers downward (true), and it has a U-shaped trough form (true).
Step 2:
Now consider the rock ages. In a syncline, the youngest rocks lie at the centre (core) of the fold, while the oldest rocks are on the outer limbs. The statement that the oldest rocks are pushed up to the core is therefore false, and that describes an anticline instead. Since the question asks which is not a characteristic, this is the answer.
Answer: Option (4) — The oldest rocks are pushed up to the core (center).
A syncline is a downward-bending (concave up) fold that looks like a trough or U-shape. Identifying its true characteristics helps spot the one statement that does not belong.
Step 1:
Check the correct features of a syncline. Its limbs dip inward toward the central axis (true), it forms by compression that bends layers downward (true), and it has a U-shaped trough form (true).
Step 2:
Now consider the rock ages. In a syncline, the youngest rocks lie at the centre (core) of the fold, while the oldest rocks are on the outer limbs. The statement that the oldest rocks are pushed up to the core is therefore false, and that describes an anticline instead. Since the question asks which is not a characteristic, this is the answer.
Answer: Option (4) — The oldest rocks are pushed up to the core (center).
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