The calcite in the limestone changes and fossils and layering in the original limestone disappear as interlocking grains grow.
Marble calcite limestone.
Because marble is a fairly soft material only a three on the mohs hardness scale it is easy to cut and carve.
With continued metamorphism these crystal seeds grow while any clay deposits in the limestone transform into silicate structures such as mica.
Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.
Limestones may include layers of clay or sand which may form the attractive flow banding and colours found in decorative marble.
If the limestone is pure a white marble is formed.
If the limestone is pure a white marble is formed.
When the heat and pressure hits the limestone calcite seed crystals form.
The calcite in the limestone changes and fossils and layering in the original limestone disappear as interlocking grains grow.
Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals.
Marble is a metamorphic rock formed by the alteration of limestone by heat and pressure.
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.
The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the calcite.