Is Marble Regional Or Contact Metamorphism

Before metamorphism the calcite in the limestone is often in the form of lithified fossil material and biological debris.

Is marble regional or contact metamorphism.

Foliated rocks are the result of intense pressure and sometimes to a lesser degree are also the result of heat. At the beginning the metamorphism of the limestone and 1200 1 500 bar and between 125 180 degrees celsius remote exposure to high pressure and temperature of the marble there. The higher temperatures the pyrometamorphism effect as it is known whereby not just most but practically all the marble quarried is of fine commercial grade as i have found out and the new owners of the. Regional pressure dominated metamorphism occurs over large areas during periods of mountain building.

Some marble also forms by contact metamorphism when a hot magma body heats adjacent limestone or dolostone. Regional metamorphism causes a layered or platy structure in rocks called foliation. Formation of the marble. Contact metamorphism creates marble superior in every way to that of regional metamorphism by the very nature in which it was created.

Changes in rocks caused by tectonic plates pushing together. Regional metamorphism is associated with the major events of earth dynamics and the vast majority of metamorphic rocks are so produced they are the rocks involved in the cyclic processes of erosion sedimentation burial metamorphism and mountain building events that are all related to major convective processes in earth s mantle. Occurs at low to high temperatures and medium pressure. Contact metamorphism is the name given to the changes that take place when magma is injected in the surrounding solid rock country rock.

It s no wonder marble is so widely used in buildings sculptures and anything else imaginable. It s a perfect rock to use because it s soft the white mineral that dominates it is not quartz but calcite it can form either by regional metamorphism or contact metamorphism near igneous intrusions. The metamorphism of the limestone is required by marble extra iron and graphite in smaller quantities. A they increase the pressures in deeply buried regional metamorphic zones.

During metamorphism this calcite recrystallizes and the texture of the rock changes. C they prevent partial melting so solid rocks can undergo very high temperature regional metamorphism. Any type of magma body can lead to contact metamorphism from a thin dyke to a large stock.