Bacterial origin of the red pigmentation in the Devonian Slivenec Limestone, Czech Republic

Mamet, B.; Préat, A.; De Ridder, C.

doi:/10.1007/BF02536883

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Bacterial origin of the red pigmentation in the Devonian Slivenec Limestone, Czech Republic

Mamet, B.; Préat, A.; De Ridder, C. (1997). Bacterial origin of the red pigmentation in the Devonian Slivenec Limestone, Czech Republic. Facies 36: 173-187. dx.doi.org/10.1007/BF02536883

In: Facies. Springer: Heidelberg; Berlin. ISSN 0172-9179; e-ISSN 1612-4820

Available in	Authors
VLIZ: Open Marine Archive 279537 [ download pdf ]

Keywords

Czech Rep.
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian
Cyanobacteria [WoRMS]
Czech Republic [Marine Regions]
Marine/Coastal

Author keywords

geobiochemistry; red pigment; iron-oxidizing bacteria; endolithicperforations; Barrandian Basin (Czech Republic); lower Devonian(Pragian)

Authors		Top
Mamet, B. Préat, A. De Ridder, C.

Abstract

The deep-red lenses of the Pragian Slivenec Limestone have been extensively quarried for ornamental purposes since the XIIth century. Petrographic microscope observations indicate that the hematite stainings of the limestone follow ten different patterns. They range from massive non-directional filling of cavities to mineralized films and microstromatolites. Numerous iron-rich endolithes are observed. Some could be derived from bacterial or lichen perforations and some related to ferric bacteria. Infiltration along welded calcite crystals, regular mineralized films and microstromatolites suggest a ferric bacterial origin for the pigment. This is confirmed by scanning microscope examinations of polished sections, that show hematite concentrations along micrometric filamentous sheaths.

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