Figure F4. CT scans. A. Large number of cracks resulting from gas expansion (Section 316-C0004C-5H-5). Cracks do not contain clasts, mud water, or any other high-density materials. B. Typical structure of core sample after suffering spiral rotation within the core liner. Core is 2.5 inches across. White spots, possibly pyrite, can serve as rotation markers. CT = computed tomography.
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