. Scottish geographical magazine. Survey. Lake Bonneville, by GroveKarl Gilliert. Washington, 1890. 8 Monographs of the United States Geological Survey, vol. xi., by I. C. Russel. GeologicalHistory of Lake Lahontan. Washington, 1885. 456 SCOTTISH GEOGRAPHICAL MAGAZINE. Of the pristine lake the principal divisions were : (1) the main body,covering the area of the existing Salt Lake and its sloping shore eabi-ward to the Wasatch, as also part of the Great American Desert. (2) Cache Bay, covering the present Cache Valley in Utah and Idaho. (3) Utah Bay, occupying the valley of the present Utah La
. Scottish geographical magazine. Survey. Lake Bonneville, by GroveKarl Gilliert. Washington, 1890. 8 Monographs of the United States Geological Survey, vol. xi., by I. C. Russel. GeologicalHistory of Lake Lahontan. Washington, 1885. 456 SCOTTISH GEOGRAPHICAL MAGAZINE. Of the pristine lake the principal divisions were : (1) the main body,covering the area of the existing Salt Lake and its sloping shore eabi-ward to the Wasatch, as also part of the Great American Desert. (2) Cache Bay, covering the present Cache Valley in Utah and Idaho. (3) Utah Bay, occupying the valley of the present Utah Lake in theeast-central part. (4) Sevier Bay, and (5) Escalante Bay, both to thesouth. The names are identical with the present geographical designa-tions. The topographical elevations of the Bonneville area once existingas islands and archipelagoes, now appear as hills and mountain spurs,with valley passes in place of the old-time straits. On the Great Desertthe hills are half-buried in lake sediments, and rise from the lake floor. Fig. 2.—View on desert, west of urLai salt Liuie. showing nioimtains partly buried byLake Bonneville sediments. After Gilbert.—( Monograjyh I.) as sharply as do the present islands from the water-level of the SaltLake. Locally these half-hidden mountains are knoAvn as islandsto-day. (See Fig. 2.) Existing Remnants.—The Great Salt Lake, greatly exceeding inmagnitude the combined area of all other remnants of the ancient water-body, has been specially described.^ Utah Lake is a fresh-water body, 27 miles in length by 12 inbreadth, with an area of 127 square miles. It drains northward throughthe Jordan River into Great Salt Lake. It receives its supply from theProvo, American Fork, and Spanish Fork rivers, and from smallerstreams locally called creeks. During the irrigation season most ofthe water-supply is diverted at higher levels, and the lake level islower. Sevier Lake occupies a depressed area in Millard County, withwaters intensely sa
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