Fine-grained metamorphic rock split into flat plates for roofing material

Let's find possible answers to "Fine-grained metamorphic rock split into flat plates for roofing material" crossword clue. First of all, we will look for a few extra hints for this entry: Fine-grained metamorphic rock split into flat plates for roofing material. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.