Lithology and Mineral Resources

, Volume 35, Issue 3, pp 278–287 | Cite as

Fossilized filamentous microbiota in volcanosedimentary deposits in iceland

  • A. R. Geptner
  • L. T. Protasevich


The mineralization of bacterial organic matter in the groundwater of Iceland is discussed. Structural relationships between secondary minerals in cavities within a Pleistocene basaltic sill and the general sequence of their precipitation allowed us to recognize five stages of the secondary mineral formation. Two stages of layer silicate formation separated by a stage of zeolite and apophyllite formation were pointed out. The composition and structure of clay minerals formed at different stages as a result of the interaction between groundwater and basalt with an active participation of bacteria have been investigated. Clay minerals of the second stage are similar in composition and microstructure to biomorphic structures previously studied in Miocene plateau basalts. The last stage of mineralization is related to the fossilization of filamentous microbiota residing in open cavities and covering all older secondary minerals


Zeolite Clay Mineral Tephra Layer Silicate Secondary Mineral 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Maik “Nauka/Interperiodica” 2000

Authors and Affiliations

  • A. R. Geptner
    • 1
  • L. T. Protasevich
    • 2
  1. 1.Geological Institute (GIN)Russian Academy of SciencesMoscowRussia
  2. 2.Paleontological InstituteRussian Academy of SciencesMoscowRussia

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