Figure F87. Vein of saponite (dark olive-green) chalcedony (colorless), unidentified (smectite-chlorite?) phyllosilicate (olive-brown radiating fans), and minor quartz (Thin Section 8; Sample 309-1256D-78R-3, 22–25 cm) (field of view = 2.5 mm; plane-polarized light).
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