Hot Springs and Geysers SpringerLink

Biogenicity of silica precipitation around geysers and hotspring vents, North Island, New Zealand. Journal of Sedimentary Research , 67 , 88104. Google Scholar

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Biogenicity of silica precipitation around geysers and hot

However, late silica precipitation produced thick external encrustations of amorphous silica around many sheaths. Although boiling and very hot (more than 90 degrees C) waters were discharged, temperatures at many sites surrounding the vents remained sufficiently low and moist to support a microbial community that included thermophilic bacteria and cyanobacteria.

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Microbial Composition of NearBoiling SilicaDepositing

Abstract. The microbial communities in these nearboiling springs are closely associated with siliceous sinter (SiO 2 · n H 2 O), commonly known as geyserite. Geyserite, by definition, precipitates from nearboiling fluids (temperatures greater than 80°C) along the bottoms and edges of hot springs and geysers

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AAPG Datapages/Archives: Biogenicity of Silica

Biogenicity of Silica Precipitation Around Geysers and HotSpring Vents, North Island, New Zealand. Brian Jones (1), Robin W. Renaut (2), Michael R. Rosen (3) ABSTRACT Before anthropogenic modifications, Ohaaki Pool (BroadlandsOhaaki) and Dragon's Mouth Geyser (Wairakei) emitted waters at temperatures of 9398°C.

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Microbial Precipitates Around Continental Hot Springs and

Jones B, Renaut RW, Rosen MR (1997a) Biogenicity of silica precipitation around geysers and hotspring vents, North Island, New Zealand. J Sed Res A67: 881o4 Google Scholar Jones B, Renaut RW, Rosen MR (1997b) Vertical zonation of biota in microstromatolites associated with hot springs, North Island, New Zealand.

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Taphonomic Modes in Microbial Fossilization NCBI Bookshelf

Biomineralization as a Factor in Microbial Biosedimentology and Fossilization. As a result of cellular metabolism, microorganisms alter the chemical microenvironment around the cell, modulating the pH, as well as the concentration of a variety of organic and inorganic solutes. This can induce the largescale precipitation of authigenic minerals in natural environments. Some examples follow.

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