Figure F61. Magmatic layering and variation in grain sizes. A. Sample 304-U1309D-51R-2, 77–80 cm (cross-polarized light; field of view [FOV] = 2 cm). B. Same as A; plane-polarized light. C. Sample 304-U1309D-51R-1, 82–85 cm (cross-polarized light; FOV = 2 cm). D. Same as C; plane-polarized light.
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