File:Kalktuff Bach Drackenstein Schwaebische Alb.jpg

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Deutsch: Bachbett des Gosbach in einem Seitental der Fils, hier mit geringem Gefälle, in Unter-Drackenstein, Schwäbische Alb. Im seichten, kohlensauren Wasser bilden sich die ersten Kalktuff-Sedimente, hier „fluviale Krusten“. Die sehr dunkle Färbung der Oberfläche der Kruste ergibt sich wahrscheinlich aus photosynthetisch induzierter Lamination mittels Cyanobakterien (also kommt auch biotische Kalkbildung vor).

English: Stream bed of the “Gobach” at Unter-Drackenstein, side valley of river Fils, Swabian Alb. In the stream’s low gradient first travertine crusts form. The dark color on the crust surface is probably a thin lamination of cyanobacteria (material biologically derived from these living organisms).
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current16:23, 1 March 2017Thumbnail for version as of 16:23, 1 March 20171,800 × 1,200 (2.78 MB)Ustill (talk | contribs)User created page with UploadWizard

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