gneiss Definition
a metamorphic rock with a banded or foliated structure, typically coarse-grained and consisting mainly of feldspar, quartz, and mica.
Using gneiss: Examples
Take a moment to familiarize yourself with how "gneiss" can be used in various situations through the following examples!
Example
The mountain was made up of gneiss.
Example
Gneiss is formed from the alteration of sedimentary or igneous rocks.
Example
The gneiss was used as a building material.
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Summary: gneiss in Brief
The term 'gneiss' [nahys] refers to a coarse-grained metamorphic rock with a banded or foliated structure. It is primarily composed of feldspar, quartz, and mica, and is formed from the alteration of sedimentary or igneous rocks. Gneiss is often used as a building material, and can be found in mountain formations.
