Oil from Shale:
Oil can be extracted from this fine grained, organic rich, sedimentary rock through pyrolysis, thermal dissolution or hyderogentation. Shale contains high concentrations of organic chemical compounds known as Kerogen. From this solid mixture, oil is extracted through chemical process. Shale can be effective converted into combustible oil shale gas and liquid hydrocarbons (shale oil). Global deposits of Shale are estimated to be around 2.8 trillion to 3.3 trillion barrels of restorable oil. Planet earth is blessed with about 600 known oil shale deposits, most of which is found in United States of America. Although several countries have oil hale deposits, known deposits of economic importance is found only in 33 countries.
Gerald Carey on 09 May 11"A vast treasury of wildlife images has been steadily accumulating over the past century, yet no one has known its full extent - or indeed its gaps - and no one has had a comprehensive way of gaining access to it. ARKive will put that right, and it will be an invaluable tool for all concerned with the well-being of the natural world." Sir David Attenborough Wildscreen Patron
Holly Barlaam on 28 May 11Information and wonderful photography on endangered species. Information includes stats about each species, such as its classification, range, habitat, threats, current endangered status, conservation efforts, etc. The photos/videos are amazing.
