ABSTRACT
The oilfields had yielded 337,000 tons, or about ninety million gallons, up to the end of 1944. The oil was discovered by the D'Arcy Exploration Company, a subsidiary of the Anglo-Iranian Oil Company. The Newark oil is about 2,000 feet below the surface, the Formby oil at a depth of only 120 feet. The Newark oilfield, like most others, is situated in what is called an anticline, that is to say an area where strata, which originally lay flat, have bulged upwards. If a borehole is put down through the hard rock above it, the oil may rise to the surface, or, as in the English fields, pumping may be necessary. The most striking anticline in England is the Weald of Kent and Sussex. The oil-bearing anticlines were buried under other deposits which lay comparatively flat on top of them. The oil-bearing sandstones date from the time of the coal measures or a little later.
