Marble
- Metamorphosed limestone is a marble. Any sedimentary textures and fossils that may have been present are obliterated when the calcite crystals recrystallize (grow into larger blocky calcite crystals) during the formation process. The marble will be white if the original limestone is only calcite. However, if it contains impurities like clay, silica, or magnesium, the marble may look to have been “marbled.”
What are Metamorphic Rocks?
Rocks that have undergone significant heat and pressure are known as metamorphic rocks. Due to these circumstances, the minerals in rocks rearrange and recrystallize, creating a new rock with differing characteristics from the original rock. Any type of rock, including igneous and sedimentary rocks, can undergo metamorphism. They can also develop as a result of tectonic plate collisions, which subject the rock to extreme pressures and temperatures. Regional Metamorphism and Dynamothermal Metamorphism are the two basic forms of Metamorphism.