gan'yuketsugannara
1. If/when oil shale; When oil shale is present
Noun
1. If/when oil shale; When oil shale is present
1. oil impregnation; oil-bearing
1. shale
1. oil shale
1. oil shale
1. oil shale
1. oil strata
1. oil-retaining bearing
1. oil shale
1. shale oil