Figure F13. Comparison of XRF elemental analysis to core photograph and X-ray computed tomography (CT) image of CT-defined lithology Type 2. Significant elemental variations revealed by the XRF signal, most likely corresponding to variations in silt/clay ratio, not reflected in either imaging mode (interval 316-C0004D-29R-2, 108–140 cm). Oxide weight percent by XRF scan.
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