This illustration shows the Appalachian Mountains, a region of numerous flexures on a grand scale, as well as many faults; some flexures having a span of several miles, and others only a few feet or inches.

Appalachian Mountains

This illustration shows the Appalachian Mountains, a region of numerous flexures on a grand scale, as…

This illustration shows a rock formation with folds or flexures in strata. a x represents the axis or axial plane of the fold.

Flexures

This illustration shows a rock formation with folds or flexures in strata. a x represents the axis or…