Recent Examples of oil shale from the Web
The organic pigments come from oil shale deposits drilled by an energy exploration company in the Taoudeni Basin in Mauritania, West Africa, about ten years ago.
The molecules could have come from something like kerogen, a component of fossil fuel that is found in coal and oil shale.
In the Energy Policy Act of 2005, Inhofe fought to include specific language encouraging greater reliance on alternative oil sources such as oil shale.
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Britannica.com: Encyclopedia article about oil shale
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