Item talk:Q42307
From geokb
Mindat Description
A metasedimentary rock rock with a gneissic texture; a gneiss formed by the metamorphism of a sedimentary rock
Geoscience Ontology Description
A gneiss with mineralogy and texture indicating derivation from a sedimentary rock protolith. Typically consists of abundant quartz, mica, or calcsilicate minerals; aluminosilicate minerals or garnet commonly present. composition of rock tends to be more variable on a decimetric scale that in orthogneiss.
