Figure F13. Photomicrograph of calcareous silty clay with silt-sized quartz, large numbers of diatoms, silicoflagellates and sponge spicules, and scattered framboidal pyrite grains, which are common in Unit II (Sample 313-M0029A-108R-1, 33 cm; Subunit IIA). Photo under cross-polarized light is 0.7 mm in width.
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