だんかい
マンガン団塊
1. manganese nodule
2. Manganese nodulePolymetallic nodules, also called manganese nodules, are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. The core may be microscopically small and is sometimes completely transformed into manganese minerals by crystallization. When visible to the naked eye, it can be a small test (shell) of a microfossil, a phosphatized shark tooth, basalt debris or even fragments of earlier nodules.
Read “Manganese nodule” on English Wikipedia
Read “マンガン団塊” on Japanese Wikipedia
Read “Manganese nodule” on DBpedia
Read “Manganese nodule” on English Wikipedia
Read “マンガン団塊” on Japanese Wikipedia
Read “Manganese nodule” on DBpedia
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