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The objectives of this paper are to: i) describe the types of gelatinous, red-brown, iron-rich precipitates found in waterlogged surface layers of recently-formed, saline, sulfidic soils and compare these precipitates with those that befoul
boreholes in the same area and ii) elucidate the biogeochemical processes of iron mineral formation in both the gelatinous red-brown iron-rich precipitates formed during the wet season and yellowish iron-rich crusts formed in the dry season.

Mineralogy of precipitates formed by the biogeochemical oxidation of Fe(II) in mine drainage

The AA. describe the types and forms of iron sulfide minerals in magnetotactic bacteria and their possible biogeochemical and palaeomagnetic significance.

and Mn oxides at seafloor hydrothermal vents have focussed primarily on the inorganic precipitation of metals, but routine mineralogical and chemical analyses of these deposits reveal abundant microbial forms and organic carbon which suggest

The objectives of this paper are to: a) report on the detailed characteristics of the red-brown precipitates forming the sludge plumes in retention pond 4; b) describe and characterise the red-brown precipitate coating the organic mat over the pond

Iron sulfidization in tidal marsh soils

Iron sulfide minerals may be formed in tidal marshes following microbial reduction of sulfate to sulfide. Sulfate reduction requires certain necessary factors including sulfate reducing bacteria, organic matter, low redox potential, and sulfate

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