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 ?
The Phase Three program included a detailed downhole structural geology study using an Optical Televiewer to enhance the geological model at the Mikwam deposit which identified a Z-shaped drag fold, with potential for multiple hinges along the Mikwam Hinge deposit.
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.