Geology and depositional environment of limestone facies at Felda Chiku 1, Gua Musang, Kelantan

The ground mapping is done in order to produce 1:25,000 small scale of map which all the lithology in study area can be covered and identified for more details. Besides, the classification of limestone in Gua Musang is based on its geographical distribution only. This cause a confusion when the origin of the limestone is studied based on its depositional environment. Further studies in specification for limestone at Gua Musang area must done. The rational is, the limestone can be classified under related formations which has similarity on its environment during the deposit process. The microfacies analysis was done by observation of the thin section under the microscope. The parameters such as the sedimentary structure, litholog and also the bio-facies content was observed during the interpretation. The Folk’s textural classification of carbonates sediment, Dunham’s classification and Standard Microfacies Type (SMT) were used in identifying the deposition environment. The conclusion of the correlations between these parameters resulted the depositional environment of limestone facies in study area which is shallow marine of carbonate platform. The presence of marine fossil such as Fusulina sp. and Operculina sp. reinforced the statement about the origin of the limestone in study area.