Figure F11. Plots of lithology, natural gamma radiation (NGR), and carbonate content of the Eocene–Oligocene transition, Holes U1411B and U1411C. A minimum in color reflectance occurs just above the tentative Chron C13r/C13n boundary and coincides with a darker interval in Core 342-U1411B-17H. Lower NGR values in Cores 15H to 17H coincide with relatively carbonate rich intervals (see “Geochemistry”).
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