The grain size analyses and textural studies have been made from four types of sandstones occurring in and around Mawsinram, Meghalaya. For this purpose, statistical parameters of the grain size distribution have been determined. The nature of cumulative and frequency curves shows mostly bimodality in nature. It indicates mixing of the sediments mostly under sand and silt modes. Moreover, it shows the variation in the kinetic energy of the depositing agents which reflect the diversity in the grain size of source materials and different modes of transportation of sediments.

The univariant plots of size parameters reflect the distance of provenance, fluctuation in the velocity of the depositing media and higher hydrodynamic energy conditions of the transporting medium.

The bivariant plots of the samples of sandstones indicate sedimentation processes took place both under river and marine conditions. Log probability plots show dominance of saltation followed by suspension and rolling. The C-M patterns of four types of sandstones show that the sediments were carried dominantly by graded suspension alongwith rolling. The sandstones are of sand and silty sand under textural classification.