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INDIAN JOURNAL OF GEOMORPHOLOGY Volume 22 (2), July-Dec., 2017, pp.87- 99

Flow Characteristics of Conglomerates around Tyrsad and Weiloi village, East Khasi Hills district, Meghalaya, India

*Kulhi-u MERO, Hiambok Jones SYIEMLIEH, and **Devesh WALIA

*Department of Geography

**Department of Environmental Studies
North-Eastern Hill University, Shillong-793022, Meghalaya


Abstract


Flow characteristics of conglomerates depend upon various factors including porosity, the measure of the capacity of reservoir rocks to store fluids. In order to quantify the presence of underground water or other such potential, the study has been carried out on the conglomerates of Tyrsad and Weiloi area of East Khasi Hills, Meghalaya. For the present study 100 samples of conglomerates were collected. The conglomerates are composed of large to small, well rounded to rounded clasts at times greater than two centimeters in diameter and are indicative of the fluvial nature of immature river system. The porosity is measured using the standard technique i.e by determining the bulk volume of the porous sample, and then determining the volume of the skeletal material with no pores where pore volume is equal to total volume substrate by its material volume. The parameters responsible for the variation of porosity in conglomerates are grain size, sorting, cementing material and the degree of compaction. The results show that the average porosity of the conglomerates is 19.18 per cent and is classified as good porosity; one of the major factors responsible for its porous media is due to its well sorted grain size. The study highlights that such a good porosity in the conglomerates can be the host rock for water and mineral resources.


Key words: Conglomerates, Porosity, Flow Characteristics, Tyrsad, Weiloi

 

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