Science / Geology / Manganese Nodule: A rounded concretion, rich in manganese minerals with minor concentrations of cobalt, copper and nickel. These occur in abundance on some parts of the deep ocean floor and have been considered as a potential source of manganese.
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Science / Geology / Nodule: A mineral mass that has a different composition or is more weathering resistant than its surrounding rock. These are normally rounded in shape. Examples include: chert masses in a limestone rock unit, MORE
Science / Geology / Manganese Nodule: A rounded concretion, rich in manganese minerals with minor concentrations of cobalt, copper and nickel. These occur in abundance on some parts of the deep ocean floor and have been considered as a po MORE
Science / Periodic Table of Elements / Manganese (Mn): Atomic number: 25, Atomic mass: 54.9380 g.mol -1, Electronegativity: 1.5, Density: 7.43 g.cm-3 at 20?°C, Melting point: 1247 ?°C, Boiling point: 2061 ?°C, Vanderwaals radius: 0.126 nm, Ionic radius MORE