Figure F41. Core 304-U1309B-11R. A. Contact (indicated by arrows) between coarse-grained gabbro (Unit 31) and harzburgite (Unit 32) (interval 304-U1309B-11R-1, 86–99 cm). Note the talc-tremolite band between the two rock types and the variations in style of serpentinization. B. Gabbro dike crosscutting harzburgite (interval 304-U1309B-11R-2, 0–15 cm). Note the serpentine-filled cracks cutting the hydrothermally altered gabbro dike and the change in extent of serpentinization adjacent to the dike. C. Serpentine vein cutting protogranular harzburgite from the bottom (interval 304-U1309B-11R-2, 86–94 cm). Coarse brownish spinel grains within the white ellipse are visible in hand specimen.
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