Oil shale
Oil shale (also pyroschist or kérobitumeux ) is a generic term which indicates sedimentary rocks with the fine grain, containing enough organic material (called Kérogène) to be able to provide oil and fuel gas. Contrary to their name, these rocks are not Schistes. The American administration for information on energy ( United States Energy Information Administration ) estimates oil shale world reserves at 2.6 trillions of potentially exploitable barrels of petrol, of which 1 to 1.2 trillions of barrels in the United States. However, the attempts to exploit these reserves have course since more than one century, and have for the moment known of the limited results.
The Kerogen present in the oil shales perhaps converted into oil through the chemical process of the Pyrolysis. The oil shales can also be flarings directly like a basic fuel quality for the creation of energy and the heating, and can be used like basic material in chemical industries and of construction materials. The Estonia, the Brazil, the China, the Germany and the Russia use the oil shales nowadays.
It is with the presence of Bitume that the oil shales owe this odor which emerges some by friction. It is as with the presence of the bitumen as they owe their color. So that when one places them in a burning hearth, the bitumen melts and the rock, of black which it was, in fate white.