Marble Definition Metamorphic

The original rock is subjected to heat temperatures greater than 150 to 200 c and pressure 100 megapascals 1 000 bar or more causing profound physical or chemical change the protolith may be a sedimentary igneous or existing metamorphic rock.

Marble definition metamorphic.

Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. Some kinds of metamorphic rocks granite gneiss and biotite schist are two examples are strongly banded or foliated. In this hand specimen of vermont marble the crystals are small. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat.

Although metamorphic rocks typically form deep in the planet s crust they are often exposed on the surface of the earth. It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite. This type of metamorphic rock consists of recrystallized calcite in limestone or dolomite in dolomite rock. A piece or slab of this stone.

Marble is made by regional metamorphism of limestone or dolomite rock causing their microscopic grains to combine into larger crystals. Marble is a metamorphic rock composed of recrystallized carbonate minerals most commonly calcite or dolomite marble is typically not foliated although there are exceptions in geology the term marble refers to metamorphosed limestone but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Marble synonyms marble pronunciation marble translation english dictionary definition of marble. Limestone a sedimentary rock will change into the metamorphic rock marble if the right conditions are met.

The preexisting rocks may be igneous sedimentary or other metamorphic rocks. Common metamorphic rocks include phyllite schist gneiss quartzite and marble. A hard crystalline or granular metamorphic limestone white or variously colored and sometimes streaked or mottled which can take a high polish. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco 3 usually marble contains other minerals including quartz graphite pyrite and iron oxides these minerals can give marble a pink brown gray green or variegated coloration.

A metamorphic rock formed by alteration of limestone or dolomite often irregularly colored by impurities and used especially in architecture and. Slate is another common metamorphic rock that forms from shale. Metamorphic rock any rock that results from the alteration of preexisting rocks in response to changing conditions such as variations in temperature pressure and mechanical stress and the addition or subtraction of chemical components. Marble is commonly used for sculpture and as a building material.