Figure F176. A. Photomicrographs of vein cutting basalt filled with chalcedony, iron oxyhydroxide, saponite, celadonite, and minor aragonite. Note the curved and irregular filaments within the iron oxyhydroxide that may be the fossilized remains of microbes. Individual filaments are ~5-10 µm wide x 50-100 µm long (Sample 206-1256C-8R-3, 136-140 cm; field of view = 1.25 mm). B. Close up of the middle-left section of A showing detail of filaments interpreted as fossil microbes (field of view = 0.5 mm).

Figure F176. A. Photomicrographs of vein cutting basalt filled with chalcedony, iron oxyhydroxide, saponite, celadonite, and minor aragonite. Note the curved and irregular filaments within the iron oxyhydroxide that may be the fossilized remains of microbes. Individual filaments are ~5-10 µm wide x 50-100 µm long (Sample 206-1256C-8R-3, 136-140 cm; field of view = 1.25 mm). B. Close up of the middle-left section of A showing detail of filaments interpreted as fossil microbes (field of view = 0.5 mm).