- and
carbonatite tuffs.
Mineral ****ociations
include titanian augite,
rhoenite, olivine, ilmenite, spinel, plagioclase, and
titanian pargasite. It was...
- Mg)12Si12O40,
Krinovite NaMg2CrSi3O10,
Wilkinsonite Na2(Fe2+)4(Fe3+)2Si6O20
Rhoenite group Dorrite Ca2Mg2(Fe3+)4(Al,Fe3+)4Si2O20,
Hogtuvaite (Ca,Na)2(Fe2+,Fe3+...