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

Authors

  • DONALD G. MILLER Jr.,

    1. Department of Geology, University of Illinois, Urbana, III. (U.S.A.)
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      Center for Marine and Environmental Studies, Lehigh University, Bethlehem, Pa. 18015 (U.S.A.).

  • ADRIAN F. RICHARDS

    1. Department of Geology, University of Illinois, Urbana, III. (U.S.A.)
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      Center for Marine and Environmental Studies, Lehigh University, Bethlehem, Pa. 18015 (U.S.A.).


Abstract

SUMMARY

A 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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