Free Republic

The cliffs at Kimmeridge, on England's south coast, have on occasions been known to smoulder or even burst into flames in hot weather. That is because, unlike the famous white chalk cliffs of Dover, they are made of oil shale, a soft rock that has hydrocarbons trapped in its pores. The world's oil-shale beds may contain the equivalent of up to nine times as much oil as all of its conventional wells.