Figure F166. A. Grain-size and compositional layering shown by a coarse-grained pyroxene-rich band within a medium-grained olivine-bearing gabbro (interval 305-U1309D-208R-3, 41–66 cm). Yellow box = location of C and D. B. Backside view of A. C. Coarse-grained pyroxene band surrounded by medium-grained olivine-bearing gabbro (Sample 305-U1309D-208R-3, 55–58 cm) (plane-polarized light; field of view [FOV] = 2 cm). D. Same as C; cross-polarized light. Yellow box = location of E. E. Boundary between coarse-grained pyroxene band and medium-grained olivine-bearing gabbro (cross-polarized light; FOV = 11 mm). (Continued on next page.)
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