The Metamorphic Rock Marble Was Once What Kind Of Rock

Marble is a metamorphic rock.

The metamorphic rock marble was once what kind of rock.

Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco3. Marble is made by regional metamorphism of limestone or dolomite rock causing their microscopic grains to combine into larger crystals. The original rock is subjected to heat temperatures greater than 150 to 200 c and pressure 100 megapascals 1 000 bar or more causing profound physical or chemical change the protolith may be a sedimentary igneous or existing metamorphic rock.

Schist showing foliation folding metamorphic rock. Serpentinite harzburgite with asbestos metamorphic rock. 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. Under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is a mass of interlocking calcite crystals.

Metamorphic rocks are one of three main types. Limestone a sedimentary rock will change into the metamorphic rock marble if the right conditions are met. Slate is another common metamorphic rock that forms from shale. Metamorphic rocks are rocks that have undergone a change in composition due to intense heat and pressure.

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. Marble metamorphised limestone metamorphic rock. Marble is a metamorphic rockformed when limestoneis subjected to high pressureor heat. Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form.

Usually marble contains other minerals including quartz graphite pyrite and iron oxides. Marble begins as limestone before being subject to the changing process referred to as metamorphism. When granite is subjected to intense heat and pressure it changes into a metamorphic rock called gneiss. What types of rocks are there.

Metachert breccia formed from marine chert metamorphic rock. 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. In this hand specimen of vermont marble the crystals are small. Gneiss showing layered banding metamorphic rock.