Loess-like and palaeosol sediments from Lanzarote (Canary Islands/Spain) —Indicators of palaeoenvironmental change during the Late Quaternary

On Lanzarote (Canary Islands) Quaternary Saharan dust and weathered local volcanic material were trapped in Miocence to Pliocene valleys dammed by younger volcanic edifices. These sediments show sequences of alternating reddish/clayey and loess-like yellowish/silty material. In order to investigate if reddish/clayey layers contain material derived from local pedogenesis and if so, which pedogenetic processes were active, we performed sedimentological, micromorphological and environmental magnetiOn Lanzarote (Canary Islands) Quaternary Saharan dust and weathered local volcanic material were trapped in Miocence to Pliocene valleys dammed by younger volcanic edifices. These sediments show sequences of alternating reddish/clayey and loess-like yellowish/silty material. In order to investigate if reddish/clayey layers contain material derived from local pedogenesis and if so, which pedogenetic processes were active, we performed sedimentological, micromorphological and environmental magnetic analyses. The analyses demonstrate that these layers contain material derived from local soils. These soils were characterised by clay formation, rubefication and the formation of superparamagnetic particles during periods of enhanced soil moisture. Thus, they can serve as natural archives in order to reconstruct the terrestrial palaeoclimatic history of Lanzarote. The distribution of soil material in the profiles shows that cold periods of the Late Quaternary were characterised by more humid conditions than today. Using palaeontological remains and a comparison with recent soils on Tenerife, we can roughly estimate maximal palaeoprecipitation values during more humid periods.show moreshow less

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Metadaten
Institutes:Geowissenschaften
Author: Hans von Suchodoletz, Peter Kühn, Ulrich Hambach, Michael Dietze, Ludwig Zöller, Dominik Faust
Year of Completion:2009
SWD-Keyword:Bodenbildung; Kanarische Inseln; Paläoklima; Pleistozän; Sahara
Tag:Paläoumweltrekonstruktion; Staub; Umweltmagnetik
Canary Islands; Pleistocene; Saharan dust; palaeoclimate; pedogenesis
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik
URN:urn:nbn:de:bvb:703-opus-5770
Source:Palaeogeography, Palaeoclimatology, Palaeoecology(2009) volume 278, 71-87 doi:10.1016/j.palaeo.2009.03.019
Document Type:Article
Language:English
Date of Publication (online):29.07.2009