imbricate structure[′im·brə·kət ‚strək·chər]
a tectonic structure characterized by relatively thin and elongated rock sheets that overlap one another. The thickness of the rock sheets ranges from a few meters to a few hundred meters. Imbricate structures are usually found in series, forming groups of closely spaced folds, low-angle thrust faults, or fault-folds. In folded regions, they form imbricated fault zones. The amplitude of displacement may reach several kilometers but is usually not greater than a few hundred meters.