gan'yuketsugan
1. oil shale
Noun
1. oil shale
1. It's not oil shale.
1. Was oil shale.
1. Is not oil shale.; It is not oil shale.
1. Was not oil shale.; Wasn't oil shale.
1. If/when oil shale; When oil shale is present
1. Is not oil shale.; It is not oil shale.
1. Wasn't oil shale.
1. If/when oil shale; Provided oil shale exists
1. Not oil shale.