Figure F210. Typical two-domain structure in Gabbro 1 (Thin Section 63; Sample 312-1256D-214R-2, 0–6 cm). A. Clinopyroxene oikocrysts with small plagioclase chadacrysts form subophitic domains that appear in hand specimen as subspherical dark patches. Coarser-grained network domains between oikocrysts are characterized by zoned prismatic plagioclase and appear in hand specimen as a network of lighter colored material. B. Same as A; cross-polarized light.
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