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Definitions from WordNet

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Gneiss

Noun (Geology): Gneiss is a metamorphic rock characterized by distinct bands or layers of different minerals. It is formed under high temperature and pressure conditions, usually from the transformation of granite or sedimentary rock.

Example sentence: The gneiss found in this region showcases alternating bands of quartz and feldspar.

Adjective (Describing Texture): Gneissic refers to the texture of rocks or minerals that display the characteristic banding or foliation of gneiss.

Example sentence: The gneissic texture of the rock indicates its metamorphic origin.

Adjective (Describing Color): Gneissic also refers to the light-gray or pale-colored appearance commonly observed in gneiss rocks.

Example sentence: The gneissic cliffs shimmered in the sunlight, displaying subtle shades of gray.

Related products: Check out geology books or rock collecting kits on Amazon for more information about gneiss and other geological formations.