. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 8. Thin section of core showing clotted microcrystalline to submicrocrystalline chalky calcite with tubules. Micro- tubules (M) radiate from larger tubules (L). In the dense calcite the skeletal fragments are generally better preserved but there is still extensive leaching of this skeletal material, which results in scattered porosity and fossil molds (Fig. 10). Recognizable skeletal material is identical to that found in the chalky areas with the original Mg-calcite skeletons being the best preserved (
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 8. Thin section of core showing clotted microcrystalline to submicrocrystalline chalky calcite with tubules. Micro- tubules (M) radiate from larger tubules (L). In the dense calcite the skeletal fragments are generally better preserved but there is still extensive leaching of this skeletal material, which results in scattered porosity and fossil molds (Fig. 10). Recognizable skeletal material is identical to that found in the chalky areas with the original Mg-calcite skeletons being the best preserved (Fig. 9).. Figure 9. Thin section of core showing gradational contacts between chalky and dense limestone with preserved high-Mg calcite skeletal material (foraminifera).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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