Annotated record of the detailed examination of ferromanganese concretions fr...

Ferromanganese concretions cover large areas of the Gulf of Bothnia. They are flat to well-rounded, the rounded ones being richer in oxyhydroxides of iron and manganese. Rounded...

铁锰结核（Ferromanganese Concretions）广泛覆盖波的尼亚湾的大片海域。此类结核形态从扁平状至高度浑圆状不等，其中浑圆状结核的铁锰羟基氧化物（iron and manganese oxyhydroxides）含量更为丰富。浑圆状……