Metaluminous rock

Metaluminous rocks are igneous rocks that have a molar proportion of aluminium oxide lower than the combination of calcium oxide, sodium oxide and potassium oxide.[1] This contrasts with peraluminous rocks in which the aluminium oxide concentration is higher than the combination, and peralkaline rocks where the alkalis are higher.

References

  1. ↑ "metaluminous – Dictionary definition of metaluminous | Encyclopedia.com: FREE online dictionary". encyclopedia.com. Retrieved 2016-04-14.


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