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Figure F15. Core photograph of bioturbated contact between Units V and VI (interval 313-M0028A-152R-1, 65–143 cm). The overlying medium sand (65–76 cm) increases in the proportion of glauconite downhole (2%–20%) to an intensely bioturbated contact (at 76 cm) with silty clay. Burrows in clay are filled with glauconite sand, including large vertical burrow with sharp scalloped margins and multiple branches identified as Thalassinoides and Ophiomorpha.

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