Marble Is Metamorphic Rock From Limestone

Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures.

Marble is metamorphic rock from limestone.

Limestone forms when shells sand and mud are deposited at the bottom of oceans and lakes and over time solidify into rock. The main difference between limestone and marble is that limestone is a sedimentary rock typically composed of calcium carbonate fossils and marble is a metamorphic rock. What test could you perform on the rocks to be sure. Marble is a granular metamorphic rock it is derived from limestone or dolomite and it consists of a mass of interlocking grains of calcite or the mineral dolomite.

Metamorphism causes variable recrystallization of the original carbonate mineral grains. How is the texture of these two rocks different limestone martie figure a7 3 1 b figure a7 3 2 shows three metamorphic rocks that had a mudstone. Form of it when limestone buried deep in the older layers of earth s crust is subjected to heat and pressure from thick layers of overlying sediments. Limestone a sedimentary rock will change into the metamorphic rock marble if the right conditions are met.

During metamorphism the calcite limestone recrystallizes forming the interlocking calcite crystals that make up the marble. These rocks are both composed of the same mineral. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals. Marble forms when sedimentary limestone is heated and squeezed by natural rock forming processes so that the grains recrystallize.

Although metamorphic rocks typically form deep in the planet s crust they are often exposed on the surface of the earth. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. A analyze the samples of sedimentary limestone and metamorphic marble in fig. In metamorphosed sandstone recrystallization of the original quartz sand grains results in very compact quartzite also known as metaquartzite in which the often larger quartz crystals are interlocked.

Both high temperatures and pressures contribute to recrystallization. For instance the small calcite crystals in the sedimentary rock limestone and chalk change into larger crystals in the metamorphic rock marble. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco 3. 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.

Usually marble contains other minerals including quartz graphite pyrite and iron oxides. The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Marble is a rock resulting from metamorphism of sedimentary carbonate rocks most commonly limestone or dolomite rock. The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the calcite during metamorphism.