Regional Metamorphism Of Marble

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Regional metamorphism of marble. C they prevent partial melting so solid rocks can undergo very high temperature regional metamorphism. Foliated rocks are the result of intense pressure and sometimes to a lesser degree are also the result of heat. These are medium to. This metamorphism produces rocks such as gneiss and schist.

This type of metamorphic rock consists of recrystallized calcite in limestone or dolomite in dolomite rock. Regional metamorphism is caused by large geologic processes such as mountain building. A rock is squeezed under directed pressure during metamorphism it is likely to be deformed and this can result in a textural change such that the minerals are elongated in the direction perpendicular to the main stress. The heat generated by the magma chamber has changed these sedimentary rocks into the metamorphic rocks marble quartzite an hornfels.

Most regional metamorphism is accompanied by deformation under non hydrostatic or differential stress conditions. Marble is made by regional metamorphism of limestone or dolomite rock causing their microscopic grains to combine into larger crystals. Regional metamorphism occurs over a much larger area. Regional metamorphism regional metamorphism occurs over large areas and generally does not show any relationship to igneous bodies.

B they aid in the movement of dissolved silicate constituents and facilitate growth of the mineral grains. Regional metamorphism causes a layered or platy structure in rocks called foliation. 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 under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is. Regional metamorphism includes any metamorphic process that occurs over a large region.

Regional pressure dominated metamorphism occurs over large areas during periods of mountain building. Thus it usually results in forming metamorphic rocks that are strongly foliated such as slates schists and gneisses. 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. Regional metamorphism this type of metamorphism occurs over large areas that were subjected to high degrees of deformation under differential stress.

A they increase the pressures in deeply buried regional metamorphic zones. In this hand specimen of vermont marble the crystals are small.