(1)ピートと瀝青炭の中間
(2)intermediate between peat and bituminous coal
さらに詳しく
(1)ほとんどは海洋性で沿岸性真核生物藻
(2)褐藻類
(3)茶色と黄色の色素に覆われた葉緑素を持つ藻
(4)mostly marine and littoral eukaryotic algae
(5)brown algae; mostly marine and littoral eukaryotic algae
