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Curious curved slickenside fault surface with striations, which seems to be folded. Possibly, a granite intruded into soft sediment along a fault surface which was folded in the still liquid granite to the present shape
PhotoID340

Curious curved slickenside fault surface with striations, which seems to be folded. Possibly, a granite intruded into soft sediment along a fault surface which was folded in the still liquid granite to the present shape
PhotoID340

Photograph:

Reference: Spencer 1999. Geologic continuous casting below continental and deep-sea detachment faults and at the striated extrusion of Sacsayhuamán, Peru. Geology 27, 327-330