Figure F8. Photomicrograph showing the lithology of the topmost several centimeters of Subunit IIIA (Sample 194-1193A-5H-1, 143 cm; 36.5 mbsf). This skeletal packstone contains planktonic (P) and benthic foraminifers (B). Three stages of cementation are visible in mud-free interparticle spaces and within the upper portions of the partly mud-filled planktonic foraminifer tests: (1) a thin coating (~10 µm) of finely fibrous, inclusion-rich calcite; (2) a thick syntaxial overgrowth of acicular calcite; and (3) infilling of remaining space by blocky calcite. Blocky calcite also infills all interparticle spaces that are not mud filled. Some grains, such as the benthic foraminifer, have limonitic oxidized coloring.

Figure F8. Photomicrograph showing the lithology of the topmost several centimeters of Subunit IIIA (Sample 194-1193A-5H-1, 143 cm; 36.5 mbsf). This skeletal packstone contains planktonic (P) and benthic foraminifers (B). Three stages of cementation are visible in mud-free interparticle spaces and within the upper portions of the partly mud-filled planktonic foraminifer tests: (1) a thin coating (~10 µm) of finely fibrous, inclusion-rich calcite; (2) a thick syntaxial overgrowth of acicular calcite; and (3) infilling of remaining space by blocky calcite. Blocky calcite also infills all interparticle spaces that are not mud filled. Some grains, such as the benthic foraminifer, have limonitic oxidized coloring.