Eberbach and the phenomenon Neckartal
By Michael Hahl
The South German river's history is an interplay of several components: raising and lowering of large areas, variations in catchment size, climate factors and the sea levels, ranging from volcanic fields and even meteorite impacts caused - much plays into it, when river systems tap into each other, and reverse its direction. Eberbach in the room are particularly diverse and get impressive tracks that can shed light on the development of a South German river: the River Neckar.
Photo: Hahl
ago, when about 30 million years, the height difference between the northern Upper Rhine and the Odenwald begins to form first westward draining rivers and streams. Due to the deep erosion base in the Rhine estuary, they gnaw in the depth and its sources gradually eat their way further into the mountains. The Sources of the "Ur-Neckar" enlarge the catchment area by headward erosion and "undermine" the European divide.
About 24 million years ago, in Miocene, the uplift processes are interrupted, valleys filled with sediments, leveled the relief. Episodically increasing water flooded now without forming valleys, as miles of wide flooding, leaving coarse gravel, such as demonstrated Kraichgau.
gradually formed again initially small height offset and headward erosion continues. The headwaters of the great-Neckar reached the area, "Eberbach", where a far older river system drained slowly south. We call this a southbound river as a "northern Ur-Lone" or "Neckar-Lone. The dynamic Neckar taps into the old river, still sensational testimony from Eberbach Neckar knee.
done in sections, now the flow reversal, to push ahead of the original south draining tributaries Elz, Jagst and cooker, which flow quickly into the Neckar. The elevation of the Alb and the Urach volcanic field-Kirchheimer and the Middle Miocene drop in sea level safely transferred to the flow reversal, the ruins of the Nordlinger Ries Impacts tributaries lead to the Neckar.
the latest with about five million years strong again entering height difference between the upper Rhine valley and Odenwald intensifies the valley formation. Initially formed flat, very wide channels, now documented by the pot flat wide terrace at the Eberbach scouring mountain, which in turn is from the younger river bed cut Kühruh relic of the parcel.
gnaw Later the Schollerer humpback meanders and valley bottoms of Ear Mountain and hunger continue to hump up growing into mountains. The river valley becomes narrower and deeper, until the steep valley sides of the Neckar finally get their present forms. - As a chronicle of the history of the Neckar valley floors are still in Eberbach different altitudes seen. They testify to a river in transition.
Modified extract from the 16-page brochure on "Eberbach path of the river's history," which was edited by the project office proreg on behalf of the city and the nature park Neckjartal Eberbach, Odenwald. you can order the brochure from Eberbach city! Leopold Platz 1 69412 Eberbach Tel: 06271-87242 Email: tourismus@eberbach.de Web: http://www.eberbach.de/
source: HAHL, M. ( 2010): Eberbacher path of river history. Image brochure. Ed: City Eberbach, in coop. md Nature Park Neckar-Odenwald. 16S.
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