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Figure F13. Rake of slickenlines (ϕ) deduced from rake of intersection line between fault plane and split-core surface (ϕ_i) and apparent rake measured (ϕ_a). A. Apparent rake measured from top or 090° direction when fault plane dips toward west. B. Apparent rake measured from bottom or 090° direction when fault plane dips toward east. C. Apparent rake measured from top or 270° direction when fault plane dips toward east. D. Apparent rake measured from bottom or 270° direction when fault plane dips toward west. α_s = right-hand rule strike of fault plane, v_n = unit vector normal to fault plane; v_c = unit vector normal to split core surface; v_i = unit vector parallel to intersection line between fault plane and split core surface.

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