Marble Definition Metamorphic

Common metamorphic rocks include phyllite schist gneiss quartzite and marble.

Marble definition metamorphic.

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. The preexisting rocks may be igneous sedimentary or other metamorphic rocks. Limestone a sedimentary rock will change into the metamorphic rock marble if the right conditions are met.

A metamorphic rock formed by alteration of limestone or dolomite often irregularly colored by impurities and used especially in architecture and. A piece or slab of this stone. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. A hard crystalline or granular metamorphic limestone white or variously colored and sometimes streaked or mottled which can take a high polish.

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. 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. Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. Marble is commonly used for sculpture and as a building material.

Marble is made by regional metamorphism of limestone or dolomite rock causing their microscopic grains to combine into larger crystals. 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. It is much used in building and sculpture 2. Some kinds of metamorphic rocks granite gneiss and biotite schist are two examples are strongly banded or foliated.

Slate is another common metamorphic rock that forms from shale. 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. Although metamorphic rocks typically form deep in the planet s crust they are often exposed on the surface of the earth. This type of metamorphic rock consists of recrystallized calcite in limestone or dolomite in dolomite rock.