Here's why:
* Metamorphic refers to rocks that have been transformed by heat, pressure, and/or chemical reactions. This process often leads to the formation of distinct banding patterns.
* Gneiss is a high-grade metamorphic rock characterized by its distinct banding of light and dark minerals. The light bands are typically composed of quartz and feldspar, while the dark bands are often made up of biotite or hornblende.
While other metamorphic rocks can exhibit banding, gneiss is the most common and widely recognized rock type with this characteristic.
