GEOLOGY

Detailed explanation-1: -The best way to examine the rock type is to check the sediment grain size and variation. Its texture refers to the features and arrangements of the grain in such sediments. Its structure is present in rock beds and under surfaces which help record the paleocurrent and has deposited in the rocks.

Detailed explanation-2: -Sedimentary rock is often found in layers. One way to tell if a rock sample is sedimentary is to see if it is made from grains. Some samples of sedimentary rocks include limestone, sandstone, coal and shale.

Detailed explanation-3: -Grain-size diameters in millimetres are converted to phi units using the conversion formula: phi () =-log2S, where is size expressed in phi units and S is the grain size in millimetres. Phi values for grains coarser than one millimetre are negative, while those for grains finer than one millimetre are positive.

Detailed explanation-4: -Sieve analysis is an accurate way of determining the grain sizes that are present in a sediment. Loose sediment passes through a series of sieves with decreasing mesh size. The trapped sediments can, then, be weighted to determine the class size distribution of a sediment.

Detailed explanation-5: -Clastic–The common names of clastic sedimentary rocks-conglomerate, sandstone, siltstone, and shale-are based solely on grain size.