Test on Geological Fold Types and Orientations

Geological Fold Types & Orientations: A Student Guide

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Question 1 of 50%

Is the thickness of a fold measured parallel to the axial surface?

Test: Geological folds

20 questions

Question 1: Is the thickness of a fold measured parallel to the axial surface?

A. Yes

B. No

Explanation: The study materials indicate that thickness is measured parallel to the axial surface.

Question 2: A fold with an axis plunge of 85° is classified as a steeply plunging fold.

A. Yes

B. No

Explanation: A steeply plunging fold has an axis plunge between 45°-80°. A fold with an axis plunge of 85° would be considered a vertical fold, as its axis is nearly vertical.

Question 3: The thickness of a Sneaker fold, when measured parallel to its axial surface, systematically changes.

A. Yes

B. No

Explanation: The study materials state that for a Sneaker fold, the "thickness measured parallel to the axial surface" is "constant".

Question 4: A fold axis is considered steeply plunging if its plunge lies between 10°-45°.

A. Yes

B. No

Explanation: A steeply plunging fold axis has a plunge that lies between 45°-80°. The range of 10°-45° describes a gently plunging fold.

Question 5: The orientation of a fold is defined by the attitude of its axial surface and the plunge of its axis.

A. Yes

B. No

Explanation: The study materials state that the orientation of a fold is defined by the attitude of its axial surface (trace) and the plunge of its axis.