Sentence Examples


  • Petroleum and natural gas also occur in the plateau rocks in great quantities.
  • - The state's great mineral wealth is in coals of various kinds, petroleum, and natural gas.
  • Petroleum was collected for use in the most remote ages of which we have any records.
  • Deposits of copper, tin, iron and tungsten have been discovered, and a variety of other mineral products (graphite, mica, spodumene, coal, petroleum, &c.).
  • Some petroleum was obtained in the S.E.