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Fig. 2 Representative images of manganese nodules from ARA12B-St52 (150 m) and ARA12B-St58i (73 m). S=spherical, E=ellipsoidal, T=tabular, Tu=tube.

Econ. Environ. Geol. 2023;56:1~11 https://doi.org/10.9719/EEG.2023.56.1.1