Field observation of fossil manganese nodules and crusts in the the West Sici...

Fossil ferromanganese crusts, nodules and pavements are contained in stratigraphically condensed pelagic limestones from the Middle Jurassic of western Sicily; and a similar...西西里岛西部中侏罗统的凝缩型远洋石灰岩中赋存有化石铁锰结壳、结核与铺地沉积物；且存在类似的……