Geological layer that's about 1,800 miles thick

Let's find possible answers to "Geological layer that's about 1,800 miles thick" crossword clue. First of all, we will look for a few extra hints for this entry: Geological layer that's about 1,800 miles thick. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.