Ferromanganese concretions in Tasmanian lakes
PA Tyler and RT Buckney
Australian Journal of Marine and Freshwater Research
31(4) 525 - 531
Published: 1980
Abstract
Discoid ferromanganese concretions on pebble nuclei, resembling those found elsewhere in the world. occur in a number of Tasmanian lakes. Those from the now-flooded Lake Pedder had distinctive Mn/Fe ratios. The genesis of concretions is a subject of debate, but the botrpoidai nature of the oxide rims and the occurrence of globular encrustations of gelatinous cyanobacteria and bacteria on pebbles suggest microorganisms are responsible.
https://doi.org/10.1071/MF9800525
© CSIRO 1980