Marble Metamorphic Rock Grade

Marble is a non foliated metamorphic rock that is produced from the metamorphism of limestone or dolostone.

Marble metamorphic rock grade. What is the metamorphic grade of marble. The specimen shown above is about two inches five centimeters across. But grain size is also dependent on the grain size of the protolith. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

High grade metamorphic rocks tend to be coarse grained. 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. 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. Metamorphic grade refers to the degree of heat and pressure needed to create a particular metamorphic rock out if its parent rock.

Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. Low grade metamorphic rocks tend to be fine grained the newly formed metamorphic mineral grains that is. 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. It is composed primarily of calcium carbonate.

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. Lapis lazuli the famous blue gem material is actually a metamorphic rock.