Gneiss is a type of metamorphic rock formed under high pressure and temperature.
Gneiss is known for its foliated texture, which gives it a banded appearance.
Gneiss often forms in the presence of an igneous intrusion, leading to its unique composition.
Gneiss is commonly associated with regional metamorphism, where large areas of rock are subjected to intense heat and pressure.
The mineral composition of gneiss includes quartz, feldspar, and mica.