Figure F114. Low-angle range of X-ray powder diffractograms from dark green bioturbated "background" lithologies (mudrocks of variable carbonate content). The intensity bulge at ~14 Å is absent below 1241.26 mbsf, except in a sample of altered ash (Sample 210-1276A-89R-1, 20-21 cm; 1623.80 mbsf). Note the strong increase in the 7-Å diffraction peak (corresponding to chlorite and kaolinite) below 1321 mbsf. See text for discussion.

Figure F114. Low-angle range of X-ray powder diffractograms from dark green bioturbated "background" lithologies (mudrocks of variable carbonate content). The intensity bulge at ~14 Å is absent below 1241.26 mbsf, except in a sample of altered ash (Sample 210-1276A-89R-1, 20-21 cm; 1623.80 mbsf). Note the strong increase in the 7-Å diffraction peak (corresponding to chlorite and kaolinite) below 1321 mbsf. See text for discussion.