In which regions does petroleum occur in India?
Answer:
- Most of the petroleum occurrences in India are associated with anticlines and fault traps in the rock formations of the tertiary age.
- In regions of folding, anticlines or domes, it occurs where oil is trapped in the crest of the upfold.
- The oil bearing layer is porous limestone or sandstone through which oil may flow.
- The oil is prevented from rising or sinking by intervening non-porous layers.
- Petroleum is also found in fault traps between porous and non-porous rocks.