A rough heavy mass of solidified lava containing many cavities

Let's find possible answers to "A rough heavy mass of solidified lava containing many cavities" crossword clue. First of all, we will look for a few extra hints for this entry: A rough heavy mass of solidified lava containing many cavities. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.