Question

In an outcrop we find that the bedding planes are vertical and cleavage surfaces are horizontal. Which of the following fold types is/are inferred from this observation?

• A. Upright fold
• B. Recumbent fold
• C. Vertical fold
• D. Neutral fold

Hint:

In structural geology, recognizing bedding orientations is essential for identifying fold types and understanding their geometry.

Answer 1

The Correct Option is C

Step 1: Understanding the question.
The question describes a situation where the bedding planes are vertical, and the cleavage surfaces are horizontal. We need to infer the type of fold this represents.
Step 2: Analyzing the options.
(A) Upright fold: This is possible, but upright folds typically refer to folds with horizontal bedding planes, not vertical ones.
(B) Recumbent fold: This is incorrect — Recumbent folds have nearly horizontal axial planes, not vertical bedding.
(C) Vertical fold: Correct — A vertical fold has vertical bedding planes, which matches the description.
(D) Neutral fold: This refers to folds where the axial plane is at an intermediate angle, not vertical.
Step 3: Conclusion.
The correct answer is (C) Vertical fold, as it matches the description of vertical bedding planes.