Figure F24. Photographs of alteration halo associations with host rock. A. Alteration halo with no association to a hydrothermal vein or structure (interval 327-U1362A-11R-1 [Piece 12, 85–95 cm]. B. Same as A, viewed on a cut surface. C. Multilayer alteration halo directly associated with a mixed saponite (dark green) and clay (pale green) vein on the exterior surface (far left) (interval 327-U1362A-9R-2 [Piece 16, 127–137 cm]).
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