(Pages 295-296) Chemical composition of external rind and core of a ferromang...

The deposits studied by the author are crusts and coatings of manganese oxide (mixed psilomelane, wad and limonite) on a consolidated marl. They were recovered from the lake...作者所研究的沉积物为赋存于固结泥灰岩（consolidated marl）之上的氧化锰结壳与涂层，该氧化锰由钡硬锰矿（psilomelane）、水锰矿（wad）与褐铁矿（limonite）混合组成，样品采自某湖泊。