CONSOLIDATION AND SEDIMENTATION‐COMPRESSION STUDIES OF A CALCAREOUS CORE, EXUMA SOUND, BAHAMAS

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Abstract
SUMMARYA comparison is made between the void ratio and pressure relationships resulting from a laboratory consolidation test and a sedimentation‐compression computation on a short core of calcareous mud or ooze of low plasticity. Geo‐technical measurements of grain size, bulk density, Atterberg limits, water content, vane shear strength, pore‐water salinity, and carbonate content are graphically related to depth in the core. Results of the laboratory consolidation test on this material differ markedly from the in‐place relationship between void ratio, or water content, and the effective overburden pressure, or burial depth, shown by the sedimentation‐compression curve. The previous maximum consolidation pressure, based on laboratory consolidation test data, is about 60 times greater than the computed in‐place effective overburden pressure. An explanation for this difference would include the different magnitudes of time available for consolidation, cementation occurring in‐place, and orientation of the constituents. It is suggested that results of the consolidation test on carbonate muds or oozes should be interpreted with caution for geological and engineering purposes.

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