Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A fossilized material in shale and other sedimentary rock that yields oil upon heating.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun any
organic matter present in asedimentary rock that isinsoluble inorganic solvents ; theprecursor ofoil andnatural gas
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Oil shale is a type of rock that has a petroleum precursor called kerogen trapped inside of it.
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Oil shale is a precursor of oils, a rock that contains enough organic material – called kerogen – to yield oil and gas when it is cooked.
Current Oil Prices and Alternative Fuel Research Not an Indication of World Oil Reserves 2007
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The hydrocarbons locked up in shale rocks in Colorado, Wyoming and Utah, known as kerogen, was again touted as the answer to America's energy problem.
The Full Feed from HuffingtonPost.com Bill Eikenberry 2011
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Oil shale is sedimentary rock that contains solid bituminous materials -- called kerogen -- that are released as petroleum-like liquids when the rock is heated.
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Geologists estimate, and re-estimate, the Earth's carbon reservoir at more than 75 million billion metric tons, mostly buried in limestone, dolomite, ossified gunk called kerogen, coal, oil, and natural gas.
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Traditionally, the shale has been surface mined like coal and heated until an oil-like substance called kerogen turns to liquid and oozes out.
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Traditionally, the shale has been surface mined like coal and heated until an oil-like substance called kerogen turns to liquid and oozes out.
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Traditionally, the shale has been surface mined like coal and heated until an oil-like substance called kerogen turns to liquid and oozes out.
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This is a sedimentary rock that contains a solid compound called kerogen, which can be refined into a synthetic crude oil.
feminist blogs echidne 2008
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When the oil shale gets to a suitable temperature, the hydrocarbon material - called kerogen - becomes a vapor.
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