Is Marble Regional Or Contact Metamorphism

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.

Is marble regional or contact metamorphism.

The type and intensity of the metamorphism and width of the metamorphic aureole will depend on a number of factors including the type of country rock the. Regional metamorphism causes a layered or platy structure in rocks called foliation. 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 metamorphism of the limestone is required by marble extra iron and graphite in smaller quantities.

It s no wonder marble is so widely used in buildings sculptures and anything else imaginable. Regional pressure dominated metamorphism occurs over large areas during periods of mountain building. 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. Contact metamorphism creates marble superior in every way to that of regional metamorphism by the very nature in which it was created.

Formation of the marble. 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. Before metamorphism the calcite in the limestone is often in the form of lithified fossil material and biological debris. 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. 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. Burial metamorphism differs from regional and contact metamorphism in that it is the result of rocks being buried deeper into the earth s crust through tectonic movements.

Changes in rocks caused by tectonic plates pushing together. B they aid in the movement of dissolved silicate constituents and facilitate growth of the mineral grains. Foliated rocks are the result of intense pressure and sometimes to a lesser degree are also the result of heat.