The SIC is believed to be a stratified impact melt sheet composed from the base up of sublayer norite, mafic norite, felsic norite, quartz gabbro, and granophyre.
2.
The quartz content in gabbro is less than 5 % of total volume .'Quartz gabbros'or monzogabbros are also known to occur, for example the " cizlakite " at Pohorje in northeastern Slovenia, and are probably derived from magma that was over-saturated with silica.
मोबाइल