المستخلص: |
This work is the result of combination of remote sensing data, field work data, and the analytical data of the samples of the surface formations. Numerical processing made it possible to make a non-supervised classification, and then supervised classification, of the satellite image and to bring out at the end a thematic representation of the superficial geological formations according to their spectral signatures. This map is verified and validated on the basis of the land data (field visit and surface sampling data), analytical (physical and chemical analysis) and bibliographic data on the region in order to arrive at a map of the geology of the area of the study area. Comparison of remote sensing data and field data has accomplished to the identification of the following surface and subsurface geological formation: • Eolien sands medium to coarse; • Silty sands fine to medium (alluvial sand); • Pliocene Continental plateau; • Silex gravel; • Red Sandstone Mio-Pliocene; • White gypsum Sables; • Gypsum crusting; • Saline wet soils; • No soil surface (water surface and vegetation).
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