- ancient metamorphic and igneous rocks represented by a group of high grade metamorphic rocks, mostly chamokitic granulites of quartz and fieldspar,
- biotite gneisses, coarse grained crystalline rocks derived from granite which may weather to give rather sandy soils.
- Pre- Cambrian granitic and perthitic rocks
- alkaline silicate rocks, carbonatites, rocks rich in sodium and calcium carbonates
- Quaternary alluvial and lacustrine deposits
I wouldl like to find out the geologic contribution of heavy metals in the area I am researching in.