Lämmermann-Barthel, Jörg ; Neeb, Inge ; Hinderer, Matthias ; Frechen, M. (2009)
Last Glacial to Holocene fluvial aggradation and incision in the southern Upper Rhine Graben: climatic and neotectonic controls.
In: Quaternaire, 20 (1)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present a new model of landscape evolution for the southern Upper Rhine Graben based on analysis of Digital Elevation Models, new OSL and 14C dating, and a sediment budget. According to these data a three step scenario was developed (i) between ca. 60 to 16 ka BP accumulation of an alluvial fan in the southern Upper Rhine Graben, here called Upper Rhine Fan, downstream of the mouth of the Hochrhein valley. This fan is mostly composed of coarse-grained meltwater deposits. (ii) 16 to 10 ka BP incision of the Upper Rhine Fan and accumulation of a successive fan further downstream by redepositing the eroded sediments (iii) 10 ka BP to present incision of the Rhine river into the younger fan leading to the present situation. Only phase (i) has experienced a significant sediment supply from the Alps and/or Alpine foreland. During the middle Würmian, fluvial aggradation is proved by several ages from sand lenses between ca. 60 and 27.5 ka BP. The period between ca. 27.5 and 16 ka BP is represented by a single or few layers of coarse-grained cobble and boulder-rich gravels and blocks. Because sand lenses are lacking they cannot be dated directly, but most presumably their deposition was related to the Late glacial meltdown. The repeated incision of the two fan surfaces after the Last Glacial Maximum and the Younger Dryas may be caused by high inputs of sediment-poor meltwater at this time.Weak Holocene aggradations may be linked with periods of climatic deterioration, tectonic pulses, and direct human impacts.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Lämmermann-Barthel, Jörg ; Neeb, Inge ; Hinderer, Matthias ; Frechen, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Last Glacial to Holocene fluvial aggradation and incision in the southern Upper Rhine Graben: climatic and neotectonic controls |
| Sprache: | Englisch |
| Publikationsjahr: | 2009 |
| Verlag: | Association Française pour l'Étude du Quaternaire |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Quaternaire |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 1 |
| URL / URN: | http://quaternaire.revues.org/index5008.html |
| Kurzbeschreibung (Abstract): | We present a new model of landscape evolution for the southern Upper Rhine Graben based on analysis of Digital Elevation Models, new OSL and 14C dating, and a sediment budget. According to these data a three step scenario was developed (i) between ca. 60 to 16 ka BP accumulation of an alluvial fan in the southern Upper Rhine Graben, here called Upper Rhine Fan, downstream of the mouth of the Hochrhein valley. This fan is mostly composed of coarse-grained meltwater deposits. (ii) 16 to 10 ka BP incision of the Upper Rhine Fan and accumulation of a successive fan further downstream by redepositing the eroded sediments (iii) 10 ka BP to present incision of the Rhine river into the younger fan leading to the present situation. Only phase (i) has experienced a significant sediment supply from the Alps and/or Alpine foreland. During the middle Würmian, fluvial aggradation is proved by several ages from sand lenses between ca. 60 and 27.5 ka BP. The period between ca. 27.5 and 16 ka BP is represented by a single or few layers of coarse-grained cobble and boulder-rich gravels and blocks. Because sand lenses are lacking they cannot be dated directly, but most presumably their deposition was related to the Late glacial meltdown. The repeated incision of the two fan surfaces after the Last Glacial Maximum and the Younger Dryas may be caused by high inputs of sediment-poor meltwater at this time.Weak Holocene aggradations may be linked with periods of climatic deterioration, tectonic pulses, and direct human impacts. |
| Freie Schlagworte: | Upper Rhine Graben, neotectonic, alluvial fan, Late Quaternary, sediment budget |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Sedimentgeologie |
| Hinterlegungsdatum: | 18 Feb 2010 13:05 |
| Letzte Änderung: | 17 Dez 2018 13:19 |
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