ABSTRACT: Many studies have been carried out in recent years on estimating consolidation properties of claysfrom their plastic and index properties, and to prefigure about consolidation behaviour of soils. The simpleempirical equations between these parameters can be calculated and applied to specific soil types easily,thus saving time on estimating the consolidation properties of soils prior to detailed laboratory tests.Although there are quite a number of studies presented in the literature, most of these studies have beendone on pure clays (e.g. glass clay), which restrict the applicability of the calculated equations. In thisstudy, a different approach was applied to the clayey soils near Cevizdere region in Ünye (Ordu, Turkey),and the consolidation properties via standard one dimensional consolidation (oedometer) test, Atterberglimits, specific gravities, grain size distribution via wet sieve analysis and hydrometer tests, and the typeof clay minerals via X-ray diffraction (XRD) analyses of 15 natural soil samples were determined. Thesoil samples overall consist of 28 % sand-sized, 38 % silt-sized, and 34 % clay-sized particles. The liquidlimits of the samples vary between 63 % and 76 %, and plastic limits between 24 % and 34 %. Accordingto the IAEG (1976) plasticity classification, the soil samples are classified as highly-very highly plastic.The XRD analyses show the clay minerals in the soil samples are of montmorillonite type. The oedometertest results indicate that the soil samples have compression index (Cc) values ranging between 0.189and 0.625, re-compression index (Cr) values ranging between 0.011 and 0.041, and over-consolidationratio (OCR) values ranging between 4.16 and 95. The studied soil is classified as moderately-highlyover-consolidated according to the over-consolidation limit classification. The pre-consolidation stressesand liquid limits of the soil samples were investigated statistically and the coefficient of correlation iscalculated as 0.5