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Figure F11. Composite digital photographs of cores taken across the E/O boundary at Site 1218 using the shipboard GEOTEK digital imaging system. At Site 1218 (shallowest 42-Ma crust) it is clear that the Eocene–Oligocene carbonate transition is a two-step process. At Site 1219 (deeper 55-Ma crust) only one step can be observed.

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