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Figure F13. Rake of slickenlines (ϕ) deduced from the rake of intersection line between fault plane and split core surface (ϕ_i) and apparent rake measured (ϕ_a). A. ϕ_a from top or 090° direction where fault plane dips westward. B. ϕ_a from bottom or 090° direction where fault plane dips eastward. C. ϕ_a from top or 270° direction where fault plane dips eastward. D. ϕ_a from bottom or 270° direction where fault plane dips westward. 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. v_s = horizontal unit vector in the right-hand rule strike direction of fault plane.

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