Figure F297 (continued). D. Alteration patches related to a vein halo in gabbro (interval 312-1256D-222R-1, 143–149 cm). E. Frequency of the apparent aspect ratio (length/width measured along longest/shortest axes) of mineral patches in gabbro. F. Aspect ratios of both mineral and alteration patches in gabbro. G. Aspect ratios of alteration patches in gabbro. H. Aspect ratio of alteration patches in the sheeted dike complex for comparison with those in gabbro. Aspect ratios were measured on the cut surface of the archive half. Only well-defined patches with oboidal shapes were measured.
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