Calcareous sediments distributed in the calcium carbonate dissolution belt above CCD boundary.

钙质沉积物分布在碳酸钙补偿深度（CCD）界面以浅区。

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Calcareous sediments accumulated on a sea floor and eventually were compacted and cemented to form limestone.

钙质沉积物堆积在海底，最后压紧并胶结形成石灰岩。

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Based on the analyses of abundance and assemblages of calcareous nannoplankton of the surface sediments from the South China Sea, the correlation between the abundance and water depth is found.

通过对南海表层沉积中钙质超微化石丰度和属种组合的分析，得出化石丰度与水深的关系。

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