File:Strunkpass-Geologie Grosse-Urlauter Echaztobel Gross-Engstingen Schwaebische-Alb.jpg
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[edit]DescriptionStrunkpass-Geologie Grosse-Urlauter Echaztobel Gross-Engstingen Schwaebische-Alb.jpg |
Deutsch: Strunkpass am durch die Echaz tief eingeschnittenen Albtrauf der Schwäbischen Alb. Hier wurde eine aus dem nördlichen Albvorland und über Reutlingen kommende, wasserreiche plio-pleistozäne Große Ur-Lauter, die zu einer „Aare-Donau“ entwässerte, von einer zum Rhein entwässernden Echaz „geköpft“. Eine Ur-Lauter existierte sogar schon im Obermiozän. Die rezente Große Lauter gehört zu den sieben geologisch alten Fließgewässern, die, trotz Verkarstung, auch heute noch großenteils oberirdisch die Schwäbische Alb queren. Die Echaz als „rheinischer“ Fluss hatte – wie auch im Foto deutlich erkennbar – eine wesentlich stärkere Erosion als die Ur-lauter (~670 m über N.N., Strunkpass-Meeresmündung der Echaz: ~960 km, der Ur-Lauter:> 2800 km). Die Echaz hat der Ur-Lauter Einzugsgebiete (Nebenflüsse und Flusslänge) abgezapft und sie schließlich „geköpft“. Heute sind die 7,8 km von der weißen Linie („plio-pleistozäner Talboden“) bis zur rezenten Quelle der Großen Lauter ein Trockental (vgl. Foto: Image:Trockental Grosse-Lauter Kohlstettental Schwaebische-Alb.jpg). English: wind gap, Middle Swabian Alb. Two rivers are involved: Echaz and Ur-GrosseLauter. A huge Ur-Lauter, which existed since late Upper Miocene, ran through the northern Alb-Foreland, through Reutlingen and across the Alb, merging the Upper Danube (wind gap-Danube 50 km) at Obermarchtal. The Rhine’s stronger headward erosion – and that of the relatively small Echaz alike - finally captured the Ur-Lauter in plio-pleistocene time. Increasing karstification of the Alb diminished the water drainage of the “Grosse Lauter” drastically. It is now a small aboveground river, of which the 7,8 km from the wind gap to the Lauter’s karst spring is a dry valley (photo of the dry valley: Image:Trockental Grosse-Lauter Kohlstettental Schwaebische-Alb.jpg). |
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Source | Own work |
Author | Ustill |
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current | 14:59, 29 July 2018 | 1,800 × 1,500 (2.5 MB) | Ustill (talk | contribs) | ||
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Camera model | Canon EOS 350D DIGITAL |
Author | allwiki@ulrich-tichy.de |
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F-number | f/8 |
ISO speed rating | 100 |
Date and time of data generation | 16:59, 16 July 2009 |
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Online copyright statement | https://commons.wikimedia.org/wiki/File:Strunkpass-Geologie_Grosse-Urlauter_Echaztobel_Gross-Engstingen_Schwaebische-Alb.jpg |
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City shown | Tübingen |
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Orientation | Normal |
Number of components | 5 |
Horizontal resolution | 72 dpi |
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Software used | Adobe Photoshop CS5 Windows |
File change date and time | 00:44, 18 July 2018 |
Exif version | 2.21 |
Date and time of digitizing | 16:59, 16 July 2009 |
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White balance | Auto white balance |
Scene capture type | Standard |
Rating (out of 5) | 0 |
Date metadata was last modified | 02:44, 18 July 2018 |
Unique ID of original document | xmp.did:692835F12823E511899CEC5C5D5D452C |
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IIM version | 1,472 |