A high grade metamorphic rock recognizable by its banding, alternating light and dark mineral layers formed as intense heat and pressure separated its minerals during recrystallization. Some of the oldest known rocks on Earth are gneisses. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Classification
Classification UseBuilding and Construction 2 Wikipedia 'Gneiss' states this use (or use-bearing statement); earth5 pass. Formation ClassMetamorphic, high grade, formed by subjecting an older igneous or sedimentary rock to intense heat and pressure 1 Connections
Associated With
Corundum's own page names gneiss as a host rock in metamorphic terranes.
Source Corundum (Wikipedia)
Caused By
Source Gneiss (Wikipedia)
Classified As
In Discipline
Source Rock, Geology (Wikipedia)
Sources
1. Rock, Geology (Wikipedia)
Wikimedia FoundationLead sectionQuote, Lead section
A gneiss has visible bands of differing lightness, with a common example being the granite gneiss.
2. Wikidata: Gneiss
Wikidata Q166409
Corundum (Wikipedia)
Wikimedia FoundationAssociated With: Corundum, Occurrence sectionQuote, Associated With: Corundum, Occurrence section
Corundum occurs as a mineral in mica schist, gneiss, and some marbles in metamorphic terranes.
Gneiss (Wikipedia)
Caused By: Metamorphism, Lead paragraphQuote, Caused By: Metamorphism, Lead paragraph
Gneiss ( NYSE) is a common and widely distributed type of metamorphic rock
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