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The purpose of this study is to better understand the system of Quaternary loess-palaeosol sequences (LPS) of the Matmata region in southern Tunisia. Results from a combination of predominantly classical methods (grain size and mineral analysis, CaCO3-content estimation, environmental magnetism) indicate strong soil formation phases during which the conditions of sedimentation changed drastically. The heavy mineral analysis underlines northwest, west and southwest provenances of the loessic material. Furthermore, we discuss the process of soil formation in LPS and explain why these soils are very sandy in comparison to the loess units. During phases of soil formation, the northwestern sediment transport path was blocked while sandy material was blown dominantly from the southwestern Grand Erg. Therefore, we present a conceptual model including a provenance analysis of the loessic material that support and improve earlier results of Coudé-Gaussen and collaborators.
|Translated title of the contribution||Sandy soils in silty loess: The loess system of Matmata (Tunisia)|
|Number of pages||12|
|Publication status||Published - 01 Sept 2020|
- environmental changes
- desert margins
- Southern Tunisia
- Desert margins
- Environmental changes
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- 1 Finished
CREDit: CREDit - Chronological REference Datasets and Sites (CREDit) towards improved accuracy and precision in luminescence-based chronologies
Duller, G., Kreutzer, S., Roberts, H. & Sirocko, F.
01 Jan 2020 → 30 Apr 2022
Project: Externally funded research