Figure F7. Site 1262 lithostratigraphic composite illustrating downhole variation in magnetic susceptibility (MS), natural gamma radiation (NGR), carbonate content, and sediment lightness (L*). Major lithologic unit boundaries coincide with step changes in these parameters. MS and NGR variations largely correlate with clay and volcaniclastic content. The P/E and K/P boundaries are distinct from adjacent sediments in their MS and NGR values as they represent intervals of decreased carbonate deposition/preservation and increased clay and volcanic ash accumulation, both of which produce distinctive increases in MS and NGR. A single value reached 625 on the MS scale, as indicated in the figure.

Figure F7. Site 1262 lithostratigraphic composite illustrating downhole variation in magnetic susceptibility (MS), natural gamma radiation (NGR), carbonate content, and sediment lightness (L*). Major lithologic unit boundaries coincide with step changes in these parameters. MS and NGR variations largely correlate with clay and volcaniclastic content. The P/E and K/P boundaries are distinct from adjacent sediments in their MS and NGR values as they represent intervals of decreased carbonate deposition/preservation and increased clay and volcanic ash accumulation, both of which produce distinctive increases in MS and NGR. A single value reached 625 on the MS scale, as indicated in the figure.