oil shale Synonyms

shale clayey shale dolomitic shale ferruginous shale lithic shale organic-rich shale sandy shale shaly limestone shaly mudstone shaly sandstone shaly siltstone carbonaceous shale calcareous shale argillaceous chert slate whale oil bituminous shale light oil kerogen shale shale oil siltstone siliceous shale bitumen shales oil shales silty shale