Figure F29. Thin section images using different techniques (Thin Section 211; Sample 324-U1349A-7R-4, 32–35 cm). A. White background showing rock contrasted with filled vesicles. Altered olivine with spinel occurs at the upper left and lower center middle. B. Scanning light passed up through the section to a dark background. This reveals outlines of the infilling calcite, subduing the image of the rock itself except to show how strongly stained it is with iron oxyhydroxides.
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