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See also:LAKE OF See also:URMIA (also spelt URUMIAH) , a See also:lake in See also:north-western See also:Persia, between 370 10' and 38° 20' N. and between 45° 1o' and 46° E., which takes its name (Pers . Deryacheh i See also:Urmia, Turk . Urmi gol) from the See also:town of Urmia, situated near its western See also:shore, but is also known as the Deryacheh i Shahi and Shahi gol . The limits of the lake vary much, the length, N.–S., from 8o to 90 m., the width, E.–W., from 30 to 45, being greater in the See also:season of high See also:water—in See also:spring when the snows melt—and considerably less in the season of See also:low water . A rise of the level by only a few inches extends the shore of the lake for See also:miles inland, and it may be estimated that the See also:surface covered by the lake during high water is See also:half as much again as that during low water, The Shahi See also:peninsula, which juts out into the lake from the eastern See also:bank, is an See also:island during the season of high water and also sometimes after heavy autumnal rains, separated from the mainland by several miles of shallow water . The mean See also:depth of the lake is 15 to 16 ft., and its greatest depth probably does not exceed so ft . The lake has in See also:recent years exhibited extraordinary changes of level, and it is not certain whether some occasional extraordinary rises of level were due to a See also:movement of the See also:earth's crust or merely to an increase of rainfall as compared with evaporation . See also:Gunther calculated that the lake covered 1795 sq. m., but he did not See also:state whether during high or low water . De See also:Morgan gives 4000 and 6000 sq. kilometres (1544 and 2317 sq. m.) for low and high water respectively . In the See also:southern half of the lake is a cluster of about fifty rocky islands composed of See also:Miocene strata with marine shells, echinoderms and See also:corals, much resembling the beds of the See also:Vienna See also:basin . The largest of these islands, Koyun daghi, i.e . " See also:Sheep-See also:mountain," is 3 to 4 M. See also:long and has a spring of sweet water near which a few See also:people See also:settle occasionally for looking after herds of goats and sheep taken there for grazing . All the islands are uninhabited and some are See also:mere See also:bare rocks of little extent . Although fed by many See also:rivers and streams of sweet water the lake is eery saline and its water is about three-fifths as See also:salt as the water of the Dead See also:Sea—far too salt to permit the existence of See also:fish See also:life . The specific gravity of the water is 1.155 during low water and 1.113 during high water . The See also:principal salts contained in See also:solution are See also:sodium chloride, bromide and iodide and sulphates of See also:magnesia, soda and See also:iron . The only organisms living in the lake are a See also:species of artemia, a crustacean known from other brine lakes in See also:Europe and North See also:America, the larva of a species of dipterous See also:insect, probably allied to ephydra, and See also:green See also:vegetable masses composed of bacterial zoogloeae covered with a species of diatom . The rivers which flow into the lake drain an See also:area of nearly 20,000 sq. m.; See also:chub and See also:roach are found in all of them, silurus in some . The lake is navigated by a few See also:round-bottomed boats with round bows and See also:flat sterns, each of about 20 tons See also:burden and carrying an enormous square See also:sail . See also:Strabo (xi. c . 13, 2) mentions the lake with the name Spauta, a clerical See also:error for Kapauta, from Pers . Kapaut, New Pers . Kebud, meaning " See also:blue." Old Armenian writers have Kapoit-dzov, " the blue sea." In the Zendavesta and Bundahish it is called " Chaechasta," and Firdousi in his Shahnamah (11th See also:century) has Chichast." See J. de Morgan, See also:Mission scientifique en Perse (1894) ; R . T . Gunther, " Lake Urmi and its Neighbourhood," Geogr . Journ . (See also:November 1899) . (A . |
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