152 GUIDEBOOK OF THE WESTERN UNITED STATES 



roe stone. Each oolite is built up, onion-like^ of one layer over 

 another. These layers consist of carbonate of lime chemically 

 deposited from solution in the lake water. There is almost no hme 

 in the water of Great Salt Lake as a whole, as the brine seems to 



mor 



carbonate. 



m 



the tri])utary river waters, however, contain a considerable amount 



mixm 



bottom 



^-^ 



may 

 th in 



sition and structm-e. 



minute 



mu 



lime is precipitated; but that is another story, too long to tell here. 



mile 



the track here being on a trestle, which continues for about 12 

 miles. The surface or deck of the trestle is ballasted with rock, 

 so that it is not very different in appearance from the solid fill. 



From the railroad the islands in Great Salt 



come 



sively into view. Fremont Island has already been referred to. 

 Antelope Island, a submerged mountain of considerable size, is 

 south of Fremont. Stansbury Island (Avith twin peaks on the 

 summit) may be seen in the distance at the south end of the lake. 

 Far to the south also are Carrmgton Island and Hat or Bird Island. 



iNortn 01 ine railroad are Uunnison and Dolphin islands and Strong 

 Knob, which was formerly an island but has lately been connected 



with the mainland by a narrow spit. A double 

 *' *''■ track with station and railroad section houses has 



oml^^ato^fmiS*- ^^^^ b^ilt on the trestle out in the middle of the 



lake, where the water is reported to be 42 feet deep. 

 The station is called Midlake. Between this station and Lakeside 



is Rambo. 



ailroad 



hmestone 



limestone in thick beds that dip toward the southeast. These rocks 

 are of Paleozoic age, the dark-blue to black limestones near Lake- 

 side belonging to the Carboniferous period. (See table on p. 2.) 



the Lakeside Mountains. 



as 



railroad maintenance, construe 



tion, and quarry camp, lies at the west end of the great fill across 

 Lakeside *^^ ^^^® ^^^' ^^^^IV), only a short distance froin 



Elevation 4'216 feet. ^^^ ^^T\ ^'''' ""'^'^^ '^''"^ '^^^ ^^^''^' ^^^' ^''''' 



Omaha i,(M7 miles. Dtown back fiom the beach is piled up along the 



tracks. It is oohtic sand like that already referred 

 to, and should a stop happen to be made here the traveler may find 

 mterest in examining a handful of the grains. To the south great 



