TU Darmstadt / ULB / TUbiblio

Last Glacial to Holocene fluvial aggradation and incision in the southern Upper Rhine Graben: climatic and neotectonic controls

Lämmermann-Barthel, Jörg and Neeb, Inge and Hinderer, Matthias and Frechen, M. (2009):
Last Glacial to Holocene fluvial aggradation and incision in the southern Upper Rhine Graben: climatic and neotectonic controls.
In: Quaternaire, Association Française pour l'Étude du Quaternaire, pp. 25-34, 20, (1), ISSN 1965-0795, [Online-Edition: http://quaternaire.revues.org/index5008.html],
[Article]

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.

Item Type: Article
Erschienen: 2009
Creators: Lämmermann-Barthel, Jörg and Neeb, Inge and Hinderer, Matthias and Frechen, M.
Title: Last Glacial to Holocene fluvial aggradation and incision in the southern Upper Rhine Graben: climatic and neotectonic controls
Language: English
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.

Journal or Publication Title: Quaternaire
Volume: 20
Number: 1
Publisher: Association Française pour l'Étude du Quaternaire
Uncontrolled Keywords: Upper Rhine Graben, neotectonic, alluvial fan, Late Quaternary, sediment budget
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Applied Sedimentary Geology
Date Deposited: 18 Feb 2010 13:05
Official URL: http://quaternaire.revues.org/index5008.html
Export:

Optionen (nur für Redakteure)

View Item View Item