Sediment example sentences

Sedimentary rocks on the western and eastern flanks of the peninsula, in Gujarat and Assam have most of the petroleum deposits.Hence, we see a number of layers of varying thickness in sedimentary rocks like sandstone, shale etc.Some are found in igneous rocks, some in metamorphic rocks while others occur in sedimentary rocks.Mineral fuels such as coal and petroleum are also found in the sedimentary strata.The sea waves deposit sediments along the shores forming beaches.Sedimentary rock formations of plains and young fold mountains contain non-metallic minerals like limestone.The word 'sedimentary' is derived from the Latin word sedimentum, which means settling.Ironically, the dams that were constructed to control floods have triggered floods due to sedimentation in the reservoir.The crustal rocks (igneous, metamorphic and sedimentary) once formed may be carried down into the mantle (interior of the earth) through subduction process (parts or whole of crustal plates going down under another plate in zones of plate convergence) and the same melt down due to increase in temperature in the interior and turn into molten magma, the original source for igneous rocks.The fragments derived out of igneous and metamorphic rocks form into sedimentary rocks.These hills running through the north-eastern states are mostly composed of strong sandstones which are sedimentary rocks.Rocks (igneous, sedimentary and metamorphic) of the earth's surface are exposed to denudational agents, and are broken up into various sizes of fragments.Sedimentary rocks themselves can turn into fragments and the fragments can be a source for formation of sedimentary rocks.The collection of sediments from all the mouths forms a delta.In due course of time this depression, gradually got filled with deposition of sediments by the rivers flowing from the mountains in the north and the peninsular plateau in the south.