GEOLOGY

Detailed explanation-1: -The larger the particle size, the faster the permeability rate.

Detailed explanation-2: -Permeability varies according to size of soil particle. If the soil is coarse grained, permeability is more and if it is fine grained, permeability is low.

Detailed explanation-3: -The porosity of samples is inversely related to the grain size and decreases linearly as grain size increases. While a direct relationship was observed between grain size and dry bulk density, as bulk density increased with increasing median grain size.

Detailed explanation-4: -Unconsolidated sediments with rounded grains of uniform size (i.e. perfectly sorted) are the most porous (Figure 14a). Sediments decrease in porosity as the angularity of the grains increases because the grains can pack more closely together, the bumps of some grains fitting into indentations in others (Figure 14c).

Detailed explanation-5: -Our study demonstrates that actual grain size does not influence porosity, but for real sandstone samples, the sorting and shape of grains affect porosity values. The range of porosity values estimated by this method can be realistic at the basin level as the grain shape effects replicate sediment maturity.