(of rock) yielding or containing petroleum.
- ‘In the argillaceous fraction of a sedimentary series of petroliferous sandstones from the Sahara two successive diagenetic changes are considered.’
- ‘Bulgarian exports to Romania consist mainly of petroleum and petroliferous shale oils, semi-manufactured iron, crude zinc, wheat, rye, and electricity.’
- ‘Fractures commonly serve as migration pathways for petroliferous fluids.’
We take a look at several popular, though confusing, punctuation marks.