Figure F12. Core image of Paleodictyon burrows underlining an indurated claystone in Subunit IB (interval 329-U1370F-7H-3, 40–45 cm). The underside of the claystone is facing up, dislodged from the section half during splitting operations. The two brown tones in the image resulted from drying of the specimen following splitting and preceding close-up photography. The thin, white, hexagonal burrows resulted from horizontal feeding behaviors of organisms of the Nereites association in abyssal environments (Seilacher, 1977).
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