Rock example sentences

Have you ever thought about the causes of these variations? Most of these variations are caused due to differences in rock formations.In a process similar to the way in which water rubs against rocks and wears them down, strong winds also erode rocks down.Broadly speaking, peninsular rocks contain most of the reserves of coal, metallic minerals, mica and many other non-metallic minerals.Landslides are simply defined as the mass movement of rock, debris or earth down a slope.Although, over 2000 minerals have been identified, only a few are abundantly found in most of the rocks.These hills running through the north-eastern states are mostly composed of strong sandstones which are sedimentary rocks.Metamorphic rocks are classified into two major groups — foliated rocks and non-foliated rocks.They are: Igneous Rocks — solidified from magma and lava; Sedimentary Rocks — the result of deposition of fragments of rocks by exogenous processes; Metamorphic Rocks — formed out of existing rocks undergoing recrystallisation.Children with autism often show narrow patterns of interests and repetitive behaviours such as lining up objects or stereotyped body movements such as rocking.Bauxite deposits are formed by the decomposition of a wide variety of rocks rich in aluminium silicates.Iron-ore in north Sweden, copper and nickel deposits in Ontario, Canada, iron, nickel, chromites and platinum in South Africa are examples of minerals found in igneous and metamorphic rocks.Can you think why this should be so? Two, flowing water wears away even hard rock over long periods of time.The process of taking out minerals from rocks buried under the earth's surface is called mining.Some rocks, for instance limestone, consist of a single mineral only, but majority of the rock consist of several minerals in varying proportions.Rock cycle is a continuous process through which old rocks are transformed into new ones.