Gneiss: meaning, definitions and examples

Commonly used in geology to describe a specific type of metamorphic rock that has a distinct banded appearance formed under high temperature and pressure.

• The Appalachian Mountains contain a significant amount of gneiss
• Gneiss formations are often seen in areas subjected to intense geological activity

A broad term used in geology to describe any rock that has undergone transformation due to heat, pressure, or chemical processes. It encompasses various types of rocks, including gneiss.

• Marble is a type of metamorphic rock formed from limestone
• Studying metamorphic rocks helps us understand the history of Earth's crust

Used to generally describe rocks that exhibit a banded or layered appearance, and it may not necessarily refer to one specific type of rock.

• The banded rock along the riverbank creates a beautiful pattern
• Banded rocks can be found in many geological settings