Reefs
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REEFS
Reduction Spheroids, Figure 2 a-Autoradiographs of uranium-enriched reduction spheroid cores, Weiherfeld well, Permian of northern Switzerland. The accumulation of uranium reflects the heterogeneous distribution of reduction activity, consistent with microbial activity. Diameter of radioactive uranium-rich zone is (a) 5 mm and (b) 10 mm.
element enrichments that are in many ways analogous in element inventory, geochemistry, and mineralogy to ore deposits such as unconformity-related and roll-type uranium ores.
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Cross-references Biosignatures in Rocks Chemolithotrophy
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