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Figure F6. Photomicrographs of selected representative lithologies, Site U1331. Left image = plane-polarized light, right image = cross-polarized light. A. Smear slide, zeolite clay (Sample 320-U1331B-3H-4, 149 cm). Note euhedral cruciform crystal of philipsite. B. Thin section, porcellanite (Sample 320-U1331A-14H-3, 53 cm). C. Thin section, porcellanite (Sample 320-U1331A-18X-1, 7–10 cm). D. Thin section, porcellanite (Sample 320-U1331A-19X-1, 52–61 cm). Note layering in porcellanite samples.

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