Structural justification of fariman plain as a piggy back basin structure in Binalood structural zon (NE of Iran)

Fariman plain is surround by two Fault that there are NW-SE. Fariman Fault and Band – e – Fariman activity is cause form this plain. This Faults are Boundary between metamorphic and sedimentary units. This Faults are thrust with dextral strike slip. Existance uplift, rupture and displacement in drainages, change in structures trend around Faults, all show that study area is active. My obsevations indicate that Band – e – Fariman Fault activity is more than Fariman Fault. Structures similar this plain that between two fault formed, have two Structural justification. My observation and research indicate that this plain is a Piggy back basin.