15 Questions
What type of fold is characterized by rocks that are typically convex down with the youngest beds at the core?
Syncline
Which type of fold is primarily formed by localized deformation or warping in horizontal rock layers?
Monocline
Which type of fold is defined by having a vertical center axis and the same dip angles for each rock limb?
Symmetrical fold
What type of fold is related to synclines but can have the younger rock layers closer to the center hinge?
Antiform
Which type of fold is identified by parallel beds of the same age rock dipping away from the center axis or hinge?
Anticline
What distinguishes a recumbent fold from an overturned fold?
Recumbent folds have a practically horizontal central axis, while overturned folds rotate 180 degrees.
What geological feature is created when two anticlines intersect each other?
Dome
What type of fold is typically caused by sediment slumping?
Ptygmatic fold
What causes plunging folds to form?
Application of compressional stress in more than one direction
How are dimensions of folding typically classified?
By the tightness of folding, axial plane orientation, and bed thickness
What type of structure is created when rocks bend instead of breaking during deformation?
Fold
Which geological feature may be depicted on the surface as a result of a fold?
Mountain
What property must rocks have to bend instead of breaking during deformation?
Ductile
What type of stress causes rocks to gradually bend over time?
Compressional stress
Which of the following is NOT a cause of folds in rocks?
Exposure to wind erosion
Learn about folds in geology, which are wave-like structures formed when rocks bend under pressure instead of breaking. Discover how folds appear on the surface, such as mountains or valleys, depending on the type. Understand the causes of rock folding and how it relates to deformation in the earth's layers.
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