File:Kalktuff Lenningen Rinnenwald Schwaebische-Alb.jpg
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[edit]DescriptionKalktuff Lenningen Rinnenwald Schwaebische-Alb.jpg |
Deutsch: Seltene Erscheinung einer Kalktuffrinne, Gewann „Rinnenwald“, ein bewaldetes Seitental der Oberen Lenninger Lauter, Schwäbische Alb. Aus dem abgeflachten Waldboden drückt eine stauende Weißjura-Schicht (Schichtquelle) Karstwasser als kleine Karstquelle an die Oberfläche. Das Wasser fließt in einem den Hang hinab führenden Rinnsal. Dabei wird ständig CaCO3 (Kalziumkarbonat) chemisch aus dem Wasser ausgefällt, welches sich unter und beiderseits des Rinnsals als weiche Kalkmasse absetzt. In dieser wässrigen Masse wachsen Moose (meist: Palustriella commutata) und werden auch im Laufe der Zeit von Kalkteilchen umhüllt. Die Kalkmasse und der Kalk auf den Moosen trocknen und härten langsam aus, so dass Moose und Kalk eine Krustenstruktur bilden, auf der eine neue Moosgeneration gedeihen kann. Die Wasserrinne läuft auf der höher wachsenden Krustenstruktur oben weiter (Sie auch das Foto: Image:Steinerne-Rinne_Kalktuffrinne_Erasbach_Fraenkische-Alb.jpg). Die Struktur wird auf ihrem Weg ständig niedriger und nach geschätzten 50 m ist der chemische Ausfällungsprozess nahezu erschöpft. Das Rinnsal fließt ohne Erhöhung weiter. Von dieser seltenen Erscheinung sind auf der Fränkischen Alb mehrere Beispiele als „Steinerne Rinne“ bekannt (Liste der Steinernen Rinnen in Bayern). English: Rare existence of remarkable “keeled moss travertine channels” (German: Steinerne Rinne), which are formed by accretion of travertine. The watercourse is a narrow shallow slot like channel, carrying the flowing water. By overtopping the slot the water seeps downslope, depositing travertine. The sides are stabilized by living bryophyte (often “Palustriella (Cratoneuron) commutate”), once all slowly dried up and formed crust like structures. These mechanisms build up the sides of the keel, slowly raising the height, the bryophyte continuing to grow. (see also the photo: Image:Steinerne-Rinne_Kalktuffrinne_Erasbach_Fraenkische-Alb.jpg). Such structures may have a length of ca.150 m maximum, as the flow of water diminishes and the height decreases. These structures are documented for karstic areas in Southern Germany (Baden-Württemberg an Bavaria) and also in Turkey and Mexico. The structure in the photo is hidden in the forest “Rinnenwald”,in a side valley of the Lenninger Lauter (north of Lenningen), Swabian Alb. |
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Source | Own work |
Author | Ustill |
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Camera manufacturer | Canon |
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Camera model | Canon EOS 350D DIGITAL |
Author | allwiki@ulrich-tichy.de |
Copyright holder |
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Exposure time | 1/10 sec (0.1) |
F-number | f/13 |
ISO speed rating | 100 |
Date and time of data generation | 11:31, 11 September 2008 |
Lens focal length | 24 mm |
Online copyright statement | https://commons.wikimedia.org/wiki/File:Kalktuff_Lenningen_Rinnenwald_Schwaebische-Alb.jpg |
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Width | 2,304 px |
Height | 3,456 px |
Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 14 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 00:54, 10 December 2014 |
Exif version | 2.21 |
Date and time of digitizing | 11:31, 11 September 2008 |
APEX shutter speed | 3.3219299316406 |
APEX aperture | 7.40087890625 |
APEX exposure bias | −0.66666666666667 |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,954.2333984375 |
Focal plane Y resolution | 3,958.7629394531 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto bracket |
White balance | Auto white balance |
Scene capture type | Standard |
Rating (out of 5) | 0 |
Date metadata was last modified | 01:54, 10 December 2014 |
Unique ID of original document | xmp.did:159515FB4C63E411AB27CFD27C2D2CCF |
Copyright status | Copyright status not set |
IIM version | 11,350 |