“These domes are composed of pelitic schists and gneisses folded around a core of K-feldspar granite and granitic gneiss.”

“The granite contains several inliers of tonalitic gneiss, including the Chikwakwa gneisses.”

“The Borve Series is dominated by varieties of quartzo-feldspathic schist and gneiss, composed mainly of plagioclase, quartz, and biotite.”

“Many of the gneisses in such areas were largely of mixed aspect, with bands of metamorphic rock interleaved with others of more granitic nature.”

“Later, shallower and hotter metamorphism produced widespread sillimanite grade gneisses, migmatites and in situ partial melting.”

“The prominent basement rocks of the Brumado area are Precambrian in age and consist dominantly of gneisses, schists, and amphibolite.”