JPG File 519K
Map of bottom relief forms in the northeastern Caspian Sea and old coastlines, compiled from pictures taken from Soyuz 22, September 19, 1976. The letters a, b, and c mark features compared among figures. Key to bottom relief forms: 1, underwater ridges, (1a, of supposed wave-formed origin; 1b, ridges now forming); 2, banks and sandbars of complex origin. Numbers 3-9 comprise a series of underwater ridges and inter-ridge depressions formed by waves and wind-induced surges: 3, sharp crests of relict ridges and those now forming; 4, underwater crests of ridges now forming at the water surface; 5, underwater crests of ridges now forming at significant depths; 6, underwater crests of ridges in early stages of formation at significant depths; 7, low slopes of underwater ridges; 8, inter-ridge depressions with hollows now forming; 9, inter-ridge hollows in early stages of formation. 10, Contemporary erosional hollows formed by wind-induced surges; 11, relict channels shown in contemporary relief; 12, relict channels separated by special bottom vegetation.