noun
- plural of gneiss; metamorphic rocks with a banded or layered structure formed by high temperature and pressure
Usage: geology
Examples
- The mountain range contained various gneisses formed millions of years ago.
- Geologists identified several types of gneisses in the rock formation.
- The distinctive banding patterns made these gneisses easy to recognize.
- Ancient gneisses form the foundation of many continental shields.
- The quarry extracted high-quality gneisses for construction projects.
- These gneisses showed clear evidence of intense metamorphic processes.