Definition of ferromagnesian in English:

ferromagnesian

Syllabification: fer·ro·mag·ne·sian
Pronunciation: /ˌferōˌmaɡˈnēZHən, -zēən
 
/

adjective

Geology
(Of a rock or mineral) containing iron and magnesium as major components.
More example sentences
  • Thus, in magma chambers dense ferromagnesian minerals may sink to form cumulate rocks at the base of the chamber, whereas in partial melting a lower-density melt may percolate upwards.
  • The example from the granite at Lime Crest quarry is very low in magnesium relative to those found in rocks containing more ferromagnesian minerals.
  • The very low magnesium content of Lime Crest ferroaxinite may reflect the relative scarcity of ferromagnesian minerals in the granite.

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