Kader:
This link would provide you some fundamental insight:
https://opencourseware.kfupm.edu.sa/colleges/cs/es/geol464/files%5C5-_Handouts_Lec9.pdf
Best
Syed
Yes, primarily. Other considerations are not as effective as the CCD.
Kader,
besides dissolution below the CCD and in high latitudes, as referred by Syed, you have to consider also dissolution of calcareous foraminifer tests during the diagenesis of sediments in restricted environments poor in carbonate. Typically some brackish marginal environments like lagoons, marshes and mudflats but sometimes also in normal marine conditions. Foraminifer assemblages in such cases are solely agglutinated, but in case of early diagenetic pyritization or silicification you may find rare casts of calcareous forms or casts of isolated chambers.
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