Age

Group

Rock types

Recent

Pleistocene (?)

Miocene (?)

Alluvium and soil

Laterite-limonite and ochre

Sandstone

Pegmatite and quartz vein

Granite and granite gneisses

Archaeans

Charnockite

Group

Hypersthene gneisses (porphyro-blastic) (Charnockite) granulitic hypersthene diorite and granite gneisses (Charnockite).

Garnet sillimanite gneisses

(Khondalite)

Khondalite

Group

Garnet granulite―MAGANESE ORE (HORIZON I)

* Crystalline algal limestone Archaeans

* Green shale pockets, calc-granulite + lenses of red shale

Garnet granulites―MANGANESE ORE HORIZON II

Coarse grained quartzite

Feldspethic quartzite with lenticular bands of garnetiferous quartzite―MANGANESE ORE HORIZON III

Coarse grained quartzite

Garnet-sillimanite-gneisses

(Khondalite)

Biotite gneisses