distinct, separate, discrete mean not being each and every one the same. distinct indicates that something is distinguished by the mind or eye as being apart or different from others. â¨two distinct versionsâ© separate often stresses lack of connection or a difference in identity between two things.
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO 3). It is the raw material for the manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide), cement and mortar. 2  Pulverized limestone is used as a soil conditioner to neutralize acidic soils. 3  It is crushed for use as aggregate âthe solid base for many roads as well as in asphalt concrete.
Limestone and marble were common materials used to make parts of buildings and whole statues that were meant to be exposed to the outdoors. To the surprise of architects, the acid in acid rain could turn the calcium carbonate molecules that made up the stone materials into calcium sulfate molecules.