Enter a clue or pattern or both:
The Clue
Igneous rocks (7 letter answer)
The Answer
BASALTS
Tags
Notes
The answer BASALTS is so rare that it appears less than once every 2500 puzzles.
Related Clues
Some volcanic deposits
Some volcanic rocks
Definition
BASALT as a noun:
1. the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene