Advanced Geography . Utah The plainsin the GreatBasin are so dry thatthey are seldomcovered with grass, except along the streams running from themountains. Canals have been made to lead water from these. Mountains or Tilted Blocks, — Northwest Part of Basin Region. streams to irrigate parts of the plains. A few cities and townshave grown up along the streams and canals. Some of the deep-worn ranges in this region have rich mines ofgold and of silver ore. These have led to the building of othersmall cities and towns, but the Basin region is only thinly settled. The streams of this region, like
Advanced Geography . Utah The plainsin the GreatBasin are so dry thatthey are seldomcovered with grass, except along the streams running from themountains. Canals have been made to lead water from these. Mountains or Tilted Blocks, — Northwest Part of Basin Region. streams to irrigate parts of the plains. A few cities and townshave grown up along the streams and canals. Some of the deep-worn ranges in this region have rich mines ofgold and of silver ore. These have led to the building of othersmall cities and towns, but the Basin region is only thinly settled. The streams of this region, like nearly all other streams onthe earth, wash salt from the soil. The salt is formed by theweathering of certain kinds of rocks. The amount of salt carriedby a river during an entire season may be very small, but if theriver flows for ages into a basin having no outlet, much saltgathers there. Water standing in such a basin forms a salt lake. There are many salty valleys and salt lakes in the Great of these, Great Salt lake, covers an area of about twothousand square miles. This lake widens in rainy weather andshrinks in time of drouth. A cupful of its water contains a table-spoonful of
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