1) Metamorphic rock
Found on
https://www.crosswordclues.com/clue/knotenschiefer
Knotenschiefer is a variety of spotted slate characterized by conspicuous subspherical or polyhedral clots that are often individual minerals such as cordierite, biotite, chlorite, andalusite and others. Like fleckschiefer, fruchtschiefer and garbenschiefer, knotenschiefer is a variety of contact metamorphic slate. It is formed at temperatures of ...
Found on
http://en.wikipedia.org/wiki/Knotenschiefer
No exact match found.
