A small concretion consisting of manganese and iron oxides, occurring in large numbers in ocean-floor sediment.
锰结节，锰小结瘤
Example sentencesExamples
It was on this leg of the voyage that they encountered the largest field of manganese nodules they had yet chanced across.
Crusts of iron-manganese oxides and manganese nodules occur, particularly in red clays.
But as Challenger approached the West Indies the crew encountered a phenomenon that dwarfed in importance even the discovery of manganese nodules.
The manganese nodules in Table 1 were those collected from the sea-bed of off-shore California.
A co-occurrence of these two species is known from only one locality, where they were collected from manganese nodules immediately above the Grimmeri Bed.
Definition of manganese nodule in US English:
manganese nodule
noun
A small concretion consisting of manganese and iron oxides, occurring in large numbers in ocean-floor sediment.
锰结节，锰小结瘤
Example sentencesExamples
The manganese nodules in Table 1 were those collected from the sea-bed of off-shore California.
Crusts of iron-manganese oxides and manganese nodules occur, particularly in red clays.
A co-occurrence of these two species is known from only one locality, where they were collected from manganese nodules immediately above the Grimmeri Bed.
It was on this leg of the voyage that they encountered the largest field of manganese nodules they had yet chanced across.
But as Challenger approached the West Indies the crew encountered a phenomenon that dwarfed in importance even the discovery of manganese nodules.