Figure F13. Diagrams of rake of striations (ϕ) deduced from the rake of intersection line between fault plane and split core surface (ϕi) and apparent rake measured (ϕa). αs = right-hand rule strike of fault plane, vn = unit vector normal to fault plane, vc = unit vector normal to split core surface, vi = unit vector parallel to intersection line between fault plane and split core surface. A. ϕa from top or 90° direction when fault plane dips west. B. ϕa from bottom or 90° direction when fault plane dips east. C. ϕa from top or 270° direction when fault plane dips east. D. ϕa from bottom or 270° direction when fault plane dips west.
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