Original sentence: A special feature of the limestone, resulting from its chemical weathering to water, is.Downwards to the gorge the previous layers are.Finally, at the deepest layers and up to an altitude of 500 (700) m, grey.Jurassic dolomite dominates (PERRIER et al.Limestone dissolves easily as the water percolates through its pores,.Limestone of the same geological era constitutes the slopes.The Vikos-Aoos area belongs to the Inner Ionian zone and is dominated by hard limestone of.The subalpine zone and the upper slopes of the gorge at a depth of about 400 m consist of the relatively young Eocene limestone.around Vicos village as well.channels that enlarge with the time when their roofs collapse producing rocky.its carstic nature.lower slopes at a depth of about 700 m are consisted of Jurassic and Cretaceous.so that an extended underground drainage system is developed with caves and.succeeded by a 200 m stratum of limestone of the Senon era, while the middle and.various geological age