油页岩 Traditional form: 油頁岩 Pinyin (reading): yóuyèyán Definitions: oil shale Characters: 油 - oil, fat, grease, lard; oil paints 页 - page, sheet, leaf 岩 - cliff; rocks; mountain Traditional characters: 油 - oil, fat, grease, lard; oil paints 頁 - page, sheet, leaf 岩 - cliff; rocks; mountain