Figure F138. Patches of once glassy mesostasis (now replaced by clay minerals) show a rough shape-preferred orientation and form discontinuous layers. A. Sample 309-1256D-84R-1 (Piece 7, 55–59 cm) (Thin Section 18). B. Sample 309-1256D-79R-2 (Piece 7, 48–50) (Thin Section 9) (field of view = 20 mm; plane-polarized light, blue filter).
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