油ゆ母ぼ頁けつ岩がんalso: ゆもけつがんゆぼけつがんMeanings1nounoil shalegeology›Geological term for a fine-grained sedimentary rock containing kerogen, from which liquid hydrocarbons can be extracted.油ゆ母ぼ頁けつ岩がんは、石