Marble Metamorphic Rock Grade

The specimen shown above is about two inches five centimeters across.

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. Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. 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. High grade metamorphic rocks tend to be coarse grained.

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 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. Lapis lazuli the famous blue gem material is actually a metamorphic rock. What is the metamorphic grade of marble.

Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. Metamorphic grade refers to the degree of heat and pressure needed to create a particular metamorphic rock out if its parent rock. 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. Variable grade regional or contact metamorphism along a convergent.

It is composed primarily of calcium carbonate. Marble is a non foliated metamorphic rock that is produced from the metamorphism of limestone or dolostone. But grain size is also dependent on the grain size of the protolith.