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Figure F10. Calculation of plane orientation (shaded) from two apparent dips represented by unit vectors v₁ and v₂. v₁ and v₂ parallel the intersections of the plane of interest with two auxiliary planes, the split core surface and an imaginary plane perpendicular to the split core surface and parallel to the core axis. (α₁, β₁) and (α₂, β₂) = trends and plunges v₁ and v₂ in core reference frame. v_n = unit vector normal to plane.

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