Marble Black Metamorphic Rock

The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the.

Marble black metamorphic rock.

Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. Common metamorphic rocks include phyllite schist gneiss quartzite and marble. 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. Non foliated metamorphic rocks such as hornfels marble quartzite and novaculite do not have a layered or banded appearance. Foliated means the parallel arrangement of certain mineral grains that gives the rock a striped appearance. 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.

Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques. Petrographically marbles are massive rather than thin layered and consist of a. 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. Some kinds of metamorphic rocks granite gneiss and biotite schist are two examples are strongly banded or foliated.

The preexisting rocks may be igneous sedimentary or other metamorphic rocks. 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. 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 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. Pictures and brief descriptions of some common types.