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The article describes the glacial relief and the development of Pleistocene glaciation for one of the most representative mountain units of Romania, the Retezat Mountains, with special attention to the glacial cirques and valleys. Some morphometric elements have been used to analyze the specific way in which the glaciers have modeled the relief of Retezat Mountains - the surface area, the perimeter and circularity index for glacial cirques and depth, valley top width and form ratio for glacial valleys, as well as the relations between them expressed by regression equations. Assimilating the longitudinal profile of the cirques of a logarithmic curve y = k(1-x)e-x that describes the concavity of the longitudinal profile, we found together with the known values 0.5, 1 and 2 of the constant k, that describes the concavity of the longitudinal profile, there are cirques that need the new value 1.5. The geomorphological mapping has allowed a reconstruction of the development of the Pleistocene glaciation in this mountain area. In the Lolaia phase, (Riss II), the maximum phase, the glaciers occupied 25 % of the surface of these mountains, reach down to 1035-1100 m.a.s.l., and the altitude of the perennial snow limit is placed at 1646 m, the longest glacier, Lăpusnicu Mare having 18.1 km. The last glaciers existed in the Younger Dryas (Beagu phase) in which there were only very small lens shaped glaciers, only in the cirques situated at an altitude of over 2150 m.

Glaciar relief and pleistocene glaciation in retezat mountains (Transylvanians Alps, Romania)