Kerogen
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Kerogen is solid, insoluble organic matter in sedimentary rocks. It consists of a variety of organic materials, including dead plants, algae, and other microorganisms, that have been compressed and he
Kerogen can be found in oil shale
Oil shale
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Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inor
Outcrop of Ordovician oil shale (kukersite), northern Estonia
Photomicrographs showing a cannel coal (top) 100% organic matrix and a rich oil shale (bottom) with relatively low mineral content
Fossils in Ordovician oil shale (kukersite), northern Estonia
Autun oil shale mines