Figure F3. Chilled-margin microstructures. A. Albite (Ab) crysts with a weak preferred orientation surrounded by aggregates of aphanatic chlorite (Chl) (Sample 309-1256D-149R-1, 76–79 cm). B. Micrometer-scale grains of magnetite-ilmenite (Mag-Ilm) superposed on a chilled margin (Sample 312-1256D-187R-1, 75–77 cm). C. “Flow banding” defined by curving laminae of albite and chlorite (Sample 312-1256D-176R-2, 0–2 cm). At the lower part of the image are vugs of actinolite (Act). D. Flow microstructure defined by mixed actinolite and chlorite (Sample 312-1256D-187R-1, 75–77 cm). E. Spherulites composed of actinolite, albite-anorthite (Ab-An), and iron oxide, probably magnetite (FeO) (Sample 312-1256D-187R-1, 75–77 cm). F. A clast of anorthite (An) suspended in a chilled margin (Sample 312-1256D-187R-1, 75–77 cm).
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