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Figure F15. Boundary between olivine (Ol) gabbro and troctolite (red dashed lines) (Thin Section 140; Sample 345-U1415P-22R-2, 99–115.5 cm [Piece 8]). Boundary type = grain size and modal; boundary definition = sharp and sutured. For details see “Descriptions of igneous boundaries.” A. Core close-up. Blue box indicates the position of thin section in B and C. B. Plane-polarized light. Cpx = clinopyroxene, Pl = plagioclase. C. Under crossed polars.

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