Test on Geological Fold Types and Geometry
Geological Fold Types and Geometry: A Student's Guide
Test: Geological folds
20 questions
Question 1: In a concentric fold, the adjacent fold surfaces are arcs of a circle, but each arc has a unique center of curvature.
A. Yes
B. No
Explanation: Concentric folds are characterized by adjacent fold surfaces that are arcs of a circle with a common center, not unique centers for each arc.
Question 2: A rounded fold is characterized by a large radius of curvature of its hinge zone in relation to the length of the fold limb.
A. Yes
B. No
Explanation: For a rounded fold, the radius of curvature of the hinge zone is large in relation to the length of the fold limb.
Question 3: The fold profile illustrates the angularity of the hinge zone.
A. Yes
B. No
Explanation: The study materials mention 'Angularity of the hinge zone' in relation to 'Angular fold' and 'Rounded fold', and also state that 'The fold profile is the shape of a folded layer', showing the 'geometry of the hinge limbs'.
Question 4: Is the thickness of a folded layer measured along the fold surface consistently constant?
A. Yes
B. No
Explanation: The study materials indicate that the thickness of the layer is measured 'I to the fold surface' and is constant, not 'along' the fold surface.
Question 5: The fold profile is primarily focused on depicting the overall size of the folded layer rather than the geometry of its hinge limbs.
A. Yes
B. No
Explanation: The study materials state that the fold profile is 'Showing the geometry of the hinge limbs and axial plane', indicating its focus is on these geometric details, not the overall size.