Below you can find the The most common volcanic rock in the earth's crust it also covers the dark lowlands of the moon Jeopardy Words Answer. The answer to The most common volcanic rock in the earth's crust it also covers the dark lowlands of the moon has 6 letters. This clue belongs to the Physical science category and is part of Jeopardy Word Level 2060. If you scroll near the bottom you will find other clues and answers part of level 2060