Why is marble a metamorphic rock




















Honed tiles offer more grip and are considered safe. Use of several treatments can slow the marble deterioration process. Marble is vulnerable to etching and staining by water and chemicals, for which appropriate advanced sealants have been developed to reduce this risk considerably. Marble deposits can be found in various countries around the globe. The United States of America is also a high-level Marble producer, with states such as Alabama and Texas having especially large deposits to be found within their borders.

Marble takes place in massive deposits that may be hundreds of toes thick and geographically good sized. This permits it to be economically mined on a large scale, with a few mines and quarries generating tens of millions of lots in keeping with yr. Most of these rocks are made into either crushed stone or dimension stone. Crushed stone is used as an aggregate in highways, railroad beds, constructing foundations, and different kinds of construction.

Dimension stone is produced by sawing marble into portions of particular dimensions. These are utilised in monuments, buildings, sculptures, paving and other projects. Marble has many decorative and structural uses. It is used for outdoor sculpture as well as for sculpture bases; in architecture, it is used in exterior walls and veneers, flooring, decorative features, stairways and walkways. The way in which the stone is used may be a factor in limiting or controlling the severity of the exposure.

The use or function of the marble may also affect the feasibility of applying certain treatments. Still, the type of use is not the primary factor in the major types of deterioration and damage to which marble is susceptible. The natural forces and agents of weather may have a degrading effect on the appearance and structural soundness of marble. These agents include rain, snow, temperature, wind and atmospheric pollutants. Weathering agents almost never work singly, or in isolation, they always act in combination with one another or with other agents of deterioration.

Rainwater, especially in combination with atmospheric gases, can result in the dissolution of the marble, creating higher levels of salt movement within the microstructure. Temperature can affect rates of deterioration and in larger stones movement of the pieces, as well as patterns of salt migration within the stone. Most of the natural or inherent problems which can occur with marble require some degree of moisture to occur. However, other problems such as wind erosion and vandalism may occur independently.

Marble subjected to exterior exposures deteriorates due to weathering or the natural effects of wind, rain, and thermal change. Marble is extremely durable, and because of its limited porosity does not absorb large amounts of water. It does, however, absorb some water and, since it is highly reactive when exposed to acids or even mildly acidic rainwater, it can suffer substantial deterioration. The most common symptoms of weathering are a loss of the highly polished surface where it exists and loss of crisp edge details in decorative carved areas of the stone.

Little can be done to restore edge detailing short of re-carving the stone which is usually infeasible. The gloss or polish can be maintained and, to some degree, restored on the surface of marble by using marble polishing powder and soft buffing pads. The level of effort or labour required to repolish stone will depend upon the degree of deterioration of the surface, or loss of polish. New pieces, restored pieces or well-maintained surfaces can be retained in a highly polished state with much less effort than surfaces which have been exposed to weathering for long periods of time with little or no maintenance.

For this reason, polished marble should receive regular preventive maintenance by polishing. Having a hard time polishing stone? Erosion can be the result of general weathering described above, or it can be a more localised phenomenon based upon handling or exposure.

The effects will depend largely upon the direction of prevailing winds. It would have to be consistent with the policy for the management of cultural landscapes. It may, however, be cost-effective when considering the extended life of the building. The symptoms of erosion can be as simple as the general loss of polish and edge sharpness as described above, or it can be very localised, specific wear due to contact with landscaping and mowing equipment.

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List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated December 02, Featured Video. Cite this Article Format.

Helmenstine, Anne Marie, Ph. Marble Rock: Geology, Properties, Uses. Get to Know 24 Types of Sedimentary Rock. How to Identify the 3 Major Types of Rocks.

Conglomerate Rock: Geology, Composition, Uses. Slate Rock Definition, Composition, and Uses. Your Privacy Rights. To change or withdraw your consent choices for ThoughtCo. As a result, marble is easy to carve, and that makes it useful for producing sculptures and ornamental objects.

The translucence of marble makes it especially attractive for many types of sculptures. The low hardness and solubility of marble allows it to be used as a calcium additive in animal feeds.

Calcium additives are especially important for dairy cows and egg-producing chickens. It is also used as a low-hardness abrasive for scrubbing bathroom and kitchen fixtures.

Ability to Accept a Polish: After being sanded with progressively finer abrasives, marble can be polished to a high luster. This allows attractive pieces of marble to be cut, polished, and used as floor tiles, architectural panels, facing stone, window sills, stair treads, columns, and many other pieces of decorative stone.

The name "marble" is used in a different way in the dimension stone trade. Any crystalline carbonate rock that has an ability to accept a polish is called "marble.

Home » Rocks » Metamorphic Rocks » Marble Marble A non-foliated metamorphic rock formed when limestone is altered by heat and pressure. Article by: Hobart M. Find Other Topics on Geology. Maps Volcanoes World Maps. Rock, Mineral and Fossil Collections. Hardness Picks. Flint, Chert, and Jasper. Tumbled Stones. Fluorescent Minerals. Lapis Lazuli. Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.

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