Skip to main content
mafic

mafic

1 8.6
A dark rock or mineral like basalt that is rich in iron and magnesium
  • adjective
  • /ˈmeɪfɪk/
  • Specialized
: máfico
  • If this second, now apparently ruling, paradigm were correct, felsic plutonic rocks should be somewhat more mafic than their supposed complementary volcanic fractions, but this is not supported by the statistical evidence.
  • mafic rocks

Examples

  • The term mafic refers to minerals that are rich in magnesium and iron.

  • OK, we see these mafic out props of olivine shown here in pink and Parisine shown in this greenish cyan spot.

  • Other versions in these sheaves include mafic sleepiness, seizures, hubble backfill (soft spot) in infants, fainting, and dormant eyes.

    Blog text (8)
  • Some mafic rocks contain more iron and magnesium than other igneous rocks.

  • Geologists often study mafic compositions to understand the Earth's lower crust.

How Mafic

mafic
  • Specialized
1 8.6
intermediate
45 3.6
felsic
  • Specialized
9.3

Surface Forms

mafic positive

Morphology

mafic = magnesium + ferric (opaque) = ma + fic

Formed from technical combining elements (ma- + -fic) referring to magnesium and iron; this scientific blending is not derivable by a typical B1 learner from the component parts.

Etymology

Mafic comes from the parts ma- from magnesium and -fic from ferric, meaning 'iron'. So mafic describes rocks that are rich in 'magnesium' and 'iron', which is why these rocks are often dark and heavy.