Drag Fold

Photo
Photo
Steeply dipping normal fault cutting regionally subhorizontal, almost unlithified sediments, Red Sea graben structure, Red Sea Hills, Sudan. Folding ahead of the upward propagating fault tip has produced the drag fold, which is more properly called a fault-propagtion fold. The fold is convex in the movement direction on the hanging-wall side of the fault. Photo credit: John Ramsay.