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Four left-stepping pressure ridges extend for nearly 60 km parallel and close to the southern margin of the Peshawar basin, cutting diagonally across older imbricate thrust structures of the Attock-Cherat Range. Lacustrine, fluvial, and alluvial-fan deposits dated at 2.8 to 0.6 Ma are strongly folded, faulted, and eroded prior to deposition of alluvial-fan gravels, which are themselves cut by east-northeast–trending faults with their north sides upthrown. The pressure ridges postdate some of the fan drainage but deflect other drainage. The east-northeast–trending faults are high-angle and accompanied by instrumental seismicity; there is no evidence for strike-slip except for the en echelon...

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