Marble Black Metamorphic Rock

Non foliated metamorphic rocks such as hornfels marble quartzite and novaculite do not have a layered or banded appearance.

Marble black metamorphic rock.

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

The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the. 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 a metamorphic rock formed when limestone is subjected to high pressure or heat. The preexisting rocks may be igneous sedimentary or other metamorphic rocks.

Petrographically marbles are massive rather than thin layered and consist of a. Some kinds of metamorphic rocks granite gneiss and biotite schist are two examples are strongly banded or foliated. Common metamorphic rocks include phyllite schist gneiss quartzite and marble. 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 is commonly used for sculpture and as a building material. Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals. 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.

Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques. Pictures and brief descriptions of some common types.