caldera Solutions A large volcanic crater formed by the collapse of the volcano's mouth has 2 entries with similar clues 4-letter wordstuffRock formed from volcanic ash8-letter wordsobsidianA dark glasslike volcanic rock formed by rapid solidification of lava
Solutions A large volcanic crater formed by the collapse of the volcano's mouth has 2 entries with similar clues 4-letter wordstuffRock formed from volcanic ash8-letter wordsobsidianA dark glasslike volcanic rock formed by rapid solidification of lava