Answer | Crossword Clue |
---|---|
mafic | of or pertaining to rocks rich in dark, ferromagnesian minerals |
mafic | of, relating to, or being a group of usually dark-colored minerals rich in magnesium and iron |
magnesian | (chiefly of rocks and minerals) Containing or relatively rich in magnesium |
SIALIC | Pertaining to rocks rich in silica |