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 less formal like 6 grade levle
Metamorphic rocks are made when existing rocks change because of heat, pressure, or fluids and chemicals. These rocks look different from the original ones, with new textures, minerals, and compositions. They often have stripes or bands. Metamorphism happens deep underground where the conditions are extreme. We can put metamorphic rocks into two groups: foliated and non-foliated. Foliated rocks, like slate and gneiss, have layers because the minerals lined up during metamorphism. Meanwhile, non-foliated rocks, like marble and quartzite, don't have layers and are more even. These rocks teach us about our planet's history and how it changes over time.
