Marble is formed from limestone when the limestone is affected by heat and high pressure during a process known as metamorphism. During metamorphism the calcite limestone recrystallizes, forming the interlocking calcite crystals that make up the marble.Know More
Metamorphism occurs in limestone when the limestone is located to convergent plate boundaries or when it is heated by a nearby body of hot magma. Prior to the conversion to marble, the calcite in the limestone consists primarily of mineralized fossil material, along with some biological material. When the heat and pressure hits the limestone, calcite seed crystals form. With continued metamorphism, these crystal seeds, grow while any clay deposits in the limestone transform into silicate structures such as mica.
Because marble is a fairly soft material, only a three on the Mohs hardness scale, it is easy to cut and carve. This makes marble a useful material for creating sculptures with, along with decorative flooring, or wall materials. When sanded, it gains a lustrous finish with a slightly translucent quality. Marble is also used as a calcium additive in animal feed for increased production from egg-producing chickens and dairy cows, as well as for a cleaning abrasive once finely ground. Ground marble also neutralizes acids and is particularly used for industrial and large-scale environmental applications.Learn more about Geology
According to the University of California, Santa Cruz, most hydrothermal metamorphism occurs at the boundaries of oceanic plates. The plates move apart and allow seawater to percolate through the oceanic crust.Full Answer >
Limestone can be formed as a result of evaporation, as is the case for stalactites and stalagmites in caves, or through the accumulation of calcium carbonate in marine environments. Limestone is either a biological or a chemical sedimentary rock, depending on its method of formation.Full Answer >
Limestone's most common use is as a crushed construction material, serving as a base for roads and ballast in railroads, but it also combines with crushed shale in a kiln to make cement and serves as an aggregate material in concrete. Limestone's usefulness stems from its strength and density.Full Answer >
Limestone comes from either the accumulation of organic debris of shells, fecal matter, algae and corals or from dissolved calcium carbonate depositing on the seafloor. It is primarily made of calcium carbonate in the form of the mineral, calcite. Limestone generally forms in clear, warm, shallow marine environments.Full Answer >