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Menoufiya University (2019)

GEOLOGICAL AND GEOMORPHOLOGICAL STUDIES OF WHITE DESERT AND THEIR ECO-TOURISM IMPLICATION AT FARAFRA OASIS, WESTERN DESERT, EGYPT

Thabet, Wael Ahmed.

Titre : GEOLOGICAL AND GEOMORPHOLOGICAL STUDIES OF WHITE DESERT AND THEIR ECO-TOURISM IMPLICATION AT FARAFRA OASIS, WESTERN DESERT, EGYPT

Auteur : Thabet, Wael Ahmed.

Etablissement de soutenance : Menoufiya University.

Grade : Master of Science (MS) in Geology 2019

Résumé partiel
The present thesis deals with the geology, geomorphology and assess the weathering processes that act at rates and intensities vary from environment to the other or even from one micro-environment to the other, as well as from one direction to the other on the same rock mass in the White Desert. Also evaluate the geosites within White Desert national park as a base for ecotourism destinations. Stratigraphically, the exposed rocks in the study area are of sedimentary nature and ranges in age from Late Cretaceous to Recent. The main rock units covering the northern part of the floor of the depression is the Khoman chalk Geomorphologically, the area under consideration is characterized by the conspicuous karst landforms. Four main physiographic units are recognized 1) The northern plateau 2) The eastern plateau 3) The Western plateau and 4) The Depression floor and associated landforms. The analysis was carried out for 24 samples collected from different direction and fresh rock and weathered parts of the different landforms of Khoman chalk. . Mineralogically, X-ray diffraction analysis of the collected samples indicates that all samples contain calcite associated with dolomite and gypsum as a main constituent. Except Only six sample from all samples showed to contain quartz and only one sample showed to contain aragonite. Petrographically, examination of carbonate samples under the reflected light microscope and scanning electron microscope (SEM), indicate that the samples are composed of calcite, gypsum, minor dolomite and quartz, in addition to abundant highly calcified dolomite rhomb’s (dedolomite) with scattered fine quartz grains and black iron oxide spots. The fabric of the weathered and control samples has revealed that the limestone built of micrite chalky facies and petrographically, it consists of planktonic foraminifera, benthonic foraminifera and large foraminifera most of the recorded fossils are partially or completely dissolved and fossil ghosts filled with orthospars.The Rock’s salt content examination of these forms revealed that the weathered rock samples collected at the different forms has very low total dissolved salts and electrical conductivity that are nearly equal to those of the control samples. This indicates that salt weathering is not acting at the study area at the present time and the weathering prevailing is physical weathering not chemical weathering. This study recommends conserving the site from natural (climatic change) and anthropogenic (expansion of urbanization and reclamation of new land for cultivation) threats in addition to prepare a marketing plan, increase public awareness, educational programmes and developed from the geological point of view (maps, information materials, brochures with different languages) to meet the basic requirements of the eco-tourism and geological tourism to attract more local community and tourists.

Présentation étendue (EULC)

Page publiée le 19 avril 2020