Annotated record of the detailed examination of an Mn deposit uncovered at US...

An extremely large manganese encrusted rock (allegedly called, manganese nodule) inadvertently retrieved by the USGC PONTCHARTRAIN (WHEC-70) during a deep Nansen cast on Ocean...一块附着锰质外壳的巨型岩石（据称被称为锰结核（manganese nodule）），由美国海岸警卫队（USGC）庞恰特雷恩号（WHEC-70）在远洋海域开展深海南森取样（Nansen cast）作业期间意外获取。