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Geomorphological investigations of sediment traps on Lanzarote (Canary Islands) as a key for the interpretation of a palaeoclimate archive off NW Africa

URN zum Zitieren dieses Dokuments: urn:nbn:de:bvb:703-opus4-4530

Titelangaben

von Suchodoletz, Hans ; Faust, Dominik ; Zöller, Ludwig:
Geomorphological investigations of sediment traps on Lanzarote (Canary Islands) as a key for the interpretation of a palaeoclimate archive off NW Africa.
Bayreuth , 2009

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Abstract

On Lanzarote (Canary Islands) Late Quaternary Saharan dust and volcanic material were trapped in Miocence to Pliocene valleys dammed by volcanic lava flows. These trapped sediments are potentially interesting as they can be natural archives useful to reconstruct the terrestrial palaeoclimate history of the NW African margin. Nevertheless, slope wash processes altered the primarily eolian deposits, making climatic interpretation not straightforward. Geomorphological mapping, GIS calculations and sedimentological investigations were used to unravel these processes influencing the temporal resolution of the palaeoclimatic archive, demonstrating that they average the palaeoclimatic signal by some ka. Thus, despite the colluvial geomorphic environment, the valley fillings can be used for palaeoclimatic interpretation of events with a length of at least some ka. The youngest sediments, deposited since at least 2.5 ka, are anthropogenically triggered and thus cannot be used for palaeoclimatic interpretation. The results show that the input of Saharan dust at Lanzarote increased during the last 1.0 Ma and especially during the Early/Middle Holocene.

Weitere Angaben

Publikationsform: Preprint, Postprint, Working paper, Diskussionspapier
Zusätzliche Informationen (öffentlich sichtbar): Source: Quaternary International 196, 44-56 (2009); doi: 10.1016/j.quaint.2008.03.014.
Keywords: Lanzarote; Kanarische Inseln; Pleistozän; Holozän; Geomorphologie; Lanzarote; Canary Islands; Pleistocene; Holocene; geomorphology
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Sprache: Englisch
Titel an der UBT entstanden: Ja
URN: urn:nbn:de:bvb:703-opus4-4530
Eingestellt am: 25 Apr 2014 10:16
Letzte Änderung: 06 Mai 2014 07:02
URI: https://epub.uni-bayreuth.de/id/eprint/533