Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. rock (inorganic material)
8. metamorphic rock

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by composition
6. inorganic material
7. rock
8. igneous rock
9. igneous rock by composition
10. igneous rock by composition: chemical
11. acid igneous rock
12. granite
13. granite by texture

Narrower term/s

• khondalite

Anotations

Scope note:

Metamorphic rock, commonly rich in quartz and feldspar with a banded and foliated texture comprising bands of light colored minerals that alternate with bands of dark colored minerals. It is composed of mica, quartz, and schist, with additional iron, magnesium and silicates. It is formed at temperatures above 550 degrees Centigrade. Gneiss is similar to granite in composition and may be classified as a type of granite, but it is produced by the alteration of igneous and sedimentary deposits, whereas granite is formed of igneous deposits.