Marble Metamorphic Rock Grade

Metamorphic rock can be marble because marble is a form of metamorphic rock which is composed of coarse crystals from parent limestone or dolostone rocks.

Marble metamorphic rock grade.

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. Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. Metamorphic rocks form from pre existing rocks parent rocks due to changes in either temperature pressure or volatiles within the earth often by a combination of all three. It is composed primarily of calcium carbonate.

Volatiles are those chemical substances including water and carbon dioxide that easily turn into gas or fluid and are mobile enough to move in and out of solid rock. What is the metamorphic grade of marble. The specimen shown above is about two inches five centimeters across. High grade metamorphic rocks tend to be coarse grained.

As already noted slate is formed from the low grade metamorphism of shale and has microscopic clay and mica crystals that have grown perpendicular to the stress. Variable grade regional or contact metamorphism along a convergent. Metamorphic grade refers to the degree of heat and pressure needed to create a particular metamorphic rock out if its parent rock. Marble is a non foliated metamorphic rock that is produced from the metamorphism of limestone or dolostone.

Lapis lazuli the famous blue gem material is actually a metamorphic rock. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. The various types of foliated metamorphic rocks listed in order of the grade or intensity of metamorphism and the type of foliation are slate phyllite schist and gneiss figure 7 8.