Figure F18. Photomicrographs of mineral grains in smear slides. The smear slides show relatively similar compositions; identified minerals include quartz and detrital carbonate, which are common. Biogenic carbonate (foraminiferal fragments and nannofossils) and feldspar, mica, dolomite, hypersthene, hornblende, glauconite, and zircon are present to rare. Pyrite is also observed. A. Turbidite (Sample 339-U1388B-7X-1, 9 cm). B. Contourite (Sample 339-U1388B-10X-1, 100 cm). Upper panels taken under transmitted light; lower panels taken under cross-polarized light.
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