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Show THE GREAT BASIN OF UTAH. 37 the alluvion they sink. These streams are usually so small that one can jump across them, and seldom require bridging. The large as well as the small streams mentioned, when not brackish, not unfre-quently contain trout. One of these small streams is Reese River, called so by Captain Simpson after his chief guide. This river has since become famous on account of the rich silver- bearing rocks with which its valley is characterized, and its being also the site of the city of Austin, which so suddenly sprang into existence after the discovery of the precious metal. The trend of the mountain ranges is almost invariably north and south, the limits of variation being between the true and the magnetic north. The mountains rise quite abruptly from the plains, and form bases . varying in breadth from a few miles to about twelve. These mountain ranges are so frequent and close to-gether as to make the areas between them more like valleys than plains. In cross section the valleys are slightly concave ; and Captain Simpson in his survey crossed them, in a direction of south of west, on the average every ten or fifteen miles. In length they are commensurate with the mountain ranges. Longi-tudinally, or in a general direction north and south, they are nearly level. The most massive and lofty mountains, commencing at Camp Floyd and proceeding westward, are the 0- quirr, Guyot, Goshoot or Tots- arr, Un- go- we- ah, Mon- tim, Humboldt, We- ah- bah, Pe- er- re- ah, and Se-day- e ranges. Of these the Tots- arr, Un- go- we- ah, Humboldt, Pe- er- re- ah, and Se- day- e are the most |