Tar-sands sentence example

tar-sands
  • Coal and lignitic coal are the principal economic minerals met with in this central plain, though natural gas occurs and is put to use near Medicine Hat, and " tar sands " along the northeastern edge of the Cretaceous indicate the presence of petroleum.
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  • The reserves in the Alberta tar sands are quoted at 180 billion barrels, bigger than that of every OPEC country except Saudi Arabia.
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  • There are several sources for oil including shale, tar sands and the liquid petroleum that is refined into several types of fuel.
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