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Figure F63. Shape-preferred orientation (SPO) of leucocratic patches in Gabbro 1, Hole 1256D. The binary image is upright in the vertical plane of the core cut face and shows objects of interest as black on a white background. SPO symmetry varies downhole. The red line represents the long axis of the elliptical best fit to the rose of directions. P = modal percentage of the analyzed phase, SR = shape ratio of the SPO ellipse, α = angle between the ellipse long axis and the core axis, recorded in a clockwise sense from up on the split core face.

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