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(a) State two formations in which mineral ores occur
(b) Give three negative effects of open cast mining on the environment

Answer Text:
a) - Veins and loads
- Beds and seams
- Weathering products
- Alluvial/placer deposits
-Reefs
- oil pools and wells
b) - causes soil erosion/encourages soil erosion
- derelict landscape/make landscape ugly
- destruction of bio-diversity
- creating hiding outs of thugs/thieves
- create breeding grounds for mosquitoes if the pits are filled with water