Baet Alwadi cavern, located in the central part of the coastal chain, at40km.to the east of Tartous city, with its geoKarstic diversity, is the most important Karst phenomena in the coastal area. It represents a complex geological structure, affected
by clear faults, which are the main reasons of its development. Lithologicaly, it belong to the alpian age, constituted of limestone and dolo-limestone tinged with clay, associated to basalt sills, which cross it. The cavern morphology indicates a complex shapes within the carbonate rocks, taking the direction North-South. An underground river passes through the cavern, in addition to a ground and underground flowing, due to the rainfall water precipitation indicated by the occurred springs in the region as Al Saouda spring. The cavern is a typical karstic integrated model, showing the most karst phenomena. This study allowed, using modern techniques and software, the development of a three-dimensional model, and consequentially a numerical model permitting a clear and precise classification of the caverns, in Syria and others countries.
The study of Quaternary terraces in the south of the coastal chain, safita and Marmaritadistrict, constitute a great importance in understanding the geological and structural conditions, that prevailed in the region in that period. The rivers Abrash
andAL-Arousplayed a major role in the formation of these quaternary terraces from the lower Quaternarytill Holocene. These terraces were distributed on a narrow space and points spread over the basins of the rivers in the south of the coastal chain. The high of these terraces, between tens to hundreds meters, are a strong indicator of the advancement of theuplift movements affecting the region in recent times, compared with the uplift of that terraces of other important riverssuch the Euphrates and Nahr El-Kabir-Ash-Shemaliriver,according to thestratigraphy and lithology studies, using GPStechniques to determinethe sites high et compare these values with global data, and then appreacitethe tectonic effect on the region. A numerical model tectonicactivity– terraces uplift is proposed.
