Attitude of the river bottom within the city is 200m above sea level. Gorge geographic province occupies valley of the Mtkvari river from Zemo Avchala to the eastern edge of the Teletri Range. Topography of the Tbilisi Gorge is very diverse. The reason for that are very complex geological structure, as well as erosion-denudation and accumulation processes. The left bank is hypsometrically higher and has steeper slopes.
Surface there is characterised by numerous small rivers and ravines.
At the right side of the gorge, alluvial sediments cover tectonic structure and, therefore, surface is softer. It is slightly disturbed by dry ravines. In this part of Tbilisi the major features of relief are river terraces. Between these two morphologically completely different parts of the gorge, in the lowest part of the city, the Mtkvari river flows. The Mtatsminda Range, geologically an anticline, dominates the city from the south.