Metamorphic rocks are formed by the transformation of pre-existing rocks through intense heat, pressure, or the action of fluids and chemical reactions. These rocks undergo changes in their texture, mineralogy, and overall composition, resulting in a distinct and often banded appearance. The process of metamorphism typically occurs deep beneath the Earth's surface, where rocks are subjected to extreme conditions. Metamorphic rocks can be classified into two major categories: foliated and non-foliated. Foliated rocks, such as slate and gneiss, exhibit a layered or banded structure due to the alignment of minerals during the metamorphic process. On the other hand, non-foliated rocks like marble and quartzite lack this layered appearance and tend to be more uniform in texture. These rocks are a testament to the dynamic nature of our planet and provide valuable insights into the geological history of the Earth. make this shorter

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Metamorphic rocks are formed by the transformation of pre-existing rocks through intense heat, pressure, or the action of fluids and chemical reactions. These rocks undergo changes in their texture, mineralogy, and overall composition, resulting in a distinct and often banded appearance. The process of metamorphism typically occurs deep beneath the Earth's surface, where rocks are subjected to extreme conditions. Metamorphic rocks can be classified into two major categories: foliated and non-foliated. Foliated rocks, such as slate and gneiss, exhibit a layered or banded structure due to the alignment of minerals during the metamorphic process. On the other hand, non-foliated rocks like marble and quartzite lack this layered appearance and tend to be more uniform in texture. These rocks are a testament to the dynamic nature of our planet and provide valuable insights into the geological history of the Earth.   make this shorter

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Metamorphic rocks form from existing rocks through intense heat, pressure, or chemical reactions. This process changes their texture, mineralogy, and composition, giving them a distinct appearance. They can be classified into foliated and non-foliated types, each with different structures. This transformation occurs deep underground, offering valuable insights into Earth's history.