Field observations, chemical analysis, electron and light microscopy and radiolabelling experiments provide information on the characteristics, formation and distribution of Fe and Mn rock varnishes in southernTunisia. The abundance
Rock block monitoring of rapid salt weathering in southernTunisia
Rectangular blocks of York Stone and of concrete placed on a sodium chloride sabkha in southernTunisia for six years suffered very severe breakdown, thereby indicating the power of salt weathering as a process in sebkha environments.
Djebel Aziza-die Ruinen einer Berber-Rückzugssiedlung in Südtunesien. (Djebel Aziza-the ruins of a retreat-settlement of the Berber in southernTunisia)
Limestone weathering in contemporary arid environments : a case study from southernTunisia
Algae ; Arid area ; Biogenic process ; Desert ; Geochemistry ; Karst ; Palaeo-environment ; Salt ; Tunisia ; Weathering
Weathering features are described from a meteorologically arid area in southernTunisia. The active development of a complex microkarst and associated salt weathering are combining to destroy linear karstic features such as rillenkarren, widespread
Techniques for measuring rock weathering : application to a dated fan segment sequence in southernTunisia
Alluvial cone ; Arid area ; Dating ; Relative dating ; Research technique ; Tunisia ; Weathering
Three techniques for measuring rock weathering are applied to a dated sequence of alluvial fan segments in southernTunisia. Two of these techniques depend on measuring surface roughness (the micro-roughness meter and a displacement approach
Recent aeolian origin of surficial gypsum crusts in southernTunisia : geomorphological, archaeological and remote sensing evidence
Aeolian features ; Archaeology ; C 14 dating ; Duricrust ; Eolian deflation ; Geochronology ; Gypsum ; LANDSAT ; Quaternary ; Remote sensing ; Roman era ; Surface deposits ; Thematic Mapper ; Tunisia
of the Chott Djerid basin, southernTunisia. The research focuses on crusts located on and adjacent to glacis near Tozeur, where a Roman site is located near and within an extensive deposit of surficial gypsum crusts.
This paper aims to assess the utility of sulphur isotope analysis for providing an insight into the source of the gypsum in the vicinity of the Chott Djerid basin, southernTunisia. The AA. sampled the isotopic composition of bedrock samples
Mise en place des basses terrasses holocènes dans les Matmata et leurs bordures (Sud-Tunisien). in Colloque AFEQ, Paris 1983. (Emplacement of the lower terraces in the plateau of Matmata and its borders (southernTunisia)
loessic stock| relative concentration of the detrital palygorskite proportion in the fluviatile terrace sediment). The emplacement of these terraces is in good agreement with the palaeoenvironmental holocene evolution of southernTunisia.
The distributions of three types of piedmont landform, undissected alluvial fans, dissected alluvial fans and « glacis d'érosion », are mapped in the Tunisian Southern Atlas using multispectral remotely sensed data from the Landsat Thematic Mapper
. These distributions suggest that three controls (geology, climatic change and neotectonics) may have influenced piedmont evolution and morphology in the Tunisian Southern Atlas.
The rate of iron oxide enrichment in arid zone alluvial fan soils, Tunisian southern atlas, measured by mineral magnetic techniques
Alluvial cone ; Arid area ; Atlas ; Geochemistry ; Geochronology ; Iron ; Magnetic susceptibility ; Pedogenesis ; Quaternary ; Soil properties ; Tunisia
Rates of iron oxide enrichment of soils on a segmented alluvial fan in southernTunisia are examined. Mineral magnetic and chemical characteristics of soils developed on 2 dated relict segments and on contemporary alluvium suggest that the rate