Research Article| March 01, 1992 Prolific organic SiO2 precipitation in a solute-deficient river: Rio Negro, Brazil K. O. Konhauser; K. O. Konhauser 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada Search for other works by this author on: GSW Google Scholar H. Mann; H. Mann 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada Search for other works by this author on: GSW Google Scholar W. S. Fyfe W. S. Fyfe 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information K. O. Konhauser 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada H. Mann 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada W. S. Fyfe 1Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (3): 227–230. https://doi.org/10.1130/0091-7613(1992)020<0227:POSPIA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation K. O. Konhauser, H. Mann, W. S. Fyfe; Prolific organic SiO2 precipitation in a solute-deficient river: Rio Negro, Brazil. Geology 1992;; 20 (3): 227–230. doi: https://doi.org/10.1130/0091-7613(1992)020<0227:POSPIA>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Silicon extracted and precipitated by siliceous algae indicate that the dissolved silicon levels of the Rio Negro, Brazil, are in part controlled by biological activity. Diatoms are the most prolific and adhesive eucaryotic microorganisms found in the study area; wood, leaves, and rocks serve as both solid substrates for the adhesive microbes and as nutrient sources. Scanning electron micrographs of the wood samples revealed a siliceous "gel" precipitated on both the outer surface and within the submerged wood. A biomineralization process was occurring, leading to the silicification of the wood sample. On a regional scale, this process may have important implications for the freshwater silica cycle. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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