One of the mysteries of the English language finally explained.
(of a rock or mineral) containing iron and magnesium as major components.
- ‘The rhombohedral phase usually occurs as large tabular inclusions near the rims of ferromagnesian phenocrysts.’
- ‘The example from the granite at Lime Crest quarry is very low in magnesium relative to those found in rocks containing more ferromagnesian minerals.’
- ‘There are two types of silicate minerals, the ferromagnesian and the nonferromagnesian silicates.’
- ‘The very low magnesium content of Lime Crest ferroaxinite may reflect the relative scarcity of ferromagnesian minerals in the granite.’
- ‘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.’
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