石灰岩由极细微的隐晶质的方解石组成,在热力烘烤作用下，原来的颗粒重结晶变成较粗大的晶粒成为大理岩,该过程为岩浆作用（）Limestone consist of diminutive cryptocrystalline calcite. In the condition of thermodynamic activity, the original crystal partical will recrystallize into marble whith bigger crystal. This process is called magmatism.