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Figure F41. Olivine-bearing gabbro in which clinopyroxene (Cpx) is partially replaced by amphibole (Am) at rims or along cleavage surfaces. Amphibole is colorless to green and bluish green, suggesting variation in chemical composition. Plagioclase (Pl) is partially replaced by chlorite (Chl) (Thin Section 56; Sample 345-U1415J-8R-3, 112–115 cm [Piece 12]). A. Plane-polarized light. B. Under crossed polars.

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