Duplexes are mechanisms by which slip is transferred from one detachment horizon to another.
parts: flats, ramps, roof thrust, floor thrust, horses.hinterland dipping duplex. antiformal stack: characterized by folded thrusts. foreland dipping duplex.horse transport (ht) versus horse width (hw):
if ht < hw then get hinterland dipping duplex. if ht = get antiformal stack.if ht >> hw then get hinterland dipping duplex.
note decreasing displacement gradient towards tip lines.with either fault propagation folds or with detachment folds.
Cleavage duplexes: likely a lower strain rate type of duplex.