Metamorphic Black Marble Rock

Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

Metamorphic black marble rock.

Foliated metamorphic rocks such as gneiss phyllite schist and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure. Non foliated metamorphic rocks such as hornfels marble quartzite and novaculite do not have a layered or banded appearance. 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 under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is. Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures.

The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the. The preexisting rocks may be igneous sedimentary or other metamorphic rocks. Slate is another common metamorphic rock that forms from shale. Marble granular limestone or dolomite i e rock composed of calcium magnesium carbonate that has been recrystallized under the influence of heat pressure and aqueous solutions.

The color of marble can range from the purest white to black ranging through the warmer colors in between depending on the other mineral impurities. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. Like other metamorphic rocks marble has no fossils and any layering that appears in it probably does not correspond to the original bedding of the precursor limestone. Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques.

Although metamorphic rocks typically form deep in the planet s crust they are often exposed on the surface of the earth. 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. Petrographically marbles are massive rather than thin layered and consist of a. Marble is commonly used for sculpture and as a building material.

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. Pictures and brief descriptions of some common types.