drag fold

drag fold

[′drag ‚fōld]
(geology)
A minor fold formed in an incompetent bed by movement of a competent bed so as to subject it to couple; the axis is at right angles to the direction in which the beds slip.
References in periodicals archive ?
Drag folds present in the hanging walls shows southward vergence.
However, the gravity folds are disharmonic and show opposite vergences to those related to drag folds developed on the flanks of the main anticline, showing also a basal detachment that separate this of an unfolded substrate.
The steep nature of these back thrusts and the presence of East West vergent drag folds within the thrust sheet of Surghar fault (Fig.