File:Trockental Ur-Lonetal Schwaebische-Alb.jpg
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[edit]DescriptionTrockental Ur-Lonetal Schwaebische-Alb.jpg |
Deutsch: Extrem breites, flaches Trockental, "Langental" am nördlichen Rand der Schwäbischen Alb. Heute ist das Trockental zwischen Steighof (Amstetten) und der Karstquelle im 4 km entfernten Ort Lonsee der oberste Teil des heutigen Lonetals. Die große Breite des Trockentals, hier am Talknie Gewann Hellenbart ca. 550 m, ist Ergebnis fluvialer Ausräumung durch die wasserreiche, jungtertiäre Urlone, die etwa ab Heilbronn und auch noch bis zur Wende Pliozän / Pleistozän als "Cannstatter Lone" und "Tübinger Lone" (Ur-Neckar) große Einzugsgebiete entwässerte. Die Richtung Molassebecken (später, in die dann entstandene Urdonau) entwässernde Urlone verlor durch die stärkere rückschreitende Erosion der Rheintributare sukzessive ihre Einzugsgebiete. Zusätzlich durch die stetige Anhebung und Schrägstellung der Schwäbischen Alb wurde die Urlone spätestens zur Riß-Eiszeit (~400 Tausend Jahre) bei Geislingen an der Steige geköpft. Danach war die Lone von hier bis zur Mündung in die Brenz (vorher in die Urbrenz) nur noch ein kleines Flüsschen. Im gesamten heutigen Lonetal kann man sehen, wie ein Fluss durch Verkarstung nach und nach an immer mehr Stellen trocken fällt. Das Lonetal bis Westerstetten (13 km), wo sich die Lone nach Osten wendet, wurde seit dem Mittelalter als sehr wichtiger Transportweg nach Ulm (weiter 17 km) genutzt. Heute führt eine Bundesstraße und die Hauptbahnlinie Stuttgart-Ulm-München durch dieses Tal. Im Tal liegen Flusssedimente und fruchtbare Böden, die landwirtschaftlich genutzt werden. English: dry valley of river Lone, Swabian Alb. Todays karst spring of the river emerges after ca. 5 km in Lonsee as a very small danubian tributary. But the valley is 550 m (!) wide at this point, ca. 2 km north of the karst spring. The premival Lone (Urlone), reaching back to Lower Miocene and maybe earlier is one of the oldest rivers of Southwest Germany. It used to drain a huge Ur-river including the Ur-Neckar counterwise towards the Danube. Faster headward erosion of Rhine tributaries and tectonic uplift of the Swabian Alb’s northern escarpment captured the Urlone by river Fils, which is a tributary of the Neckar. Throughout the valley of the poor rivulet Lone one can observe karstification: The rivulet falls dry at varous points. |
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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 |
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Exposure time | 1/160 sec (0.00625) |
F-number | f/10 |
ISO speed rating | 100 |
Date and time of data generation | 14:22, 19 April 2008 |
Lens focal length | 17 mm |
Online copyright statement | http://commons.wikimedia.org/wiki/Image:Trockental_Ur-Lonetal_Schwaebische-Alb.jpg |
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City shown | Tuebingen, Germany |
Width | 2,889 px |
Height | 1,679 px |
Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 5 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 22:12, 18 May 2015 |
Exposure Program | Shutter priority |
Exif version | 2.21 |
Date and time of digitizing | 14:22, 19 April 2008 |
APEX shutter speed | 7.3219299316406 |
APEX aperture | 6.6438598632812 |
APEX exposure bias | 0 |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,954.233409611 |
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Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto bracket |
White balance | Auto white balance |
Scene capture type | Standard |
Date metadata was last modified | 00:12, 19 May 2015 |
Unique ID of original document | uuid:30AE8392D47DDD118EA9C3D3F87AFAEA |
Copyright status | Copyright status not set |
IIM version | 2 |