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Show 22 been deposited since 1959. ( Its location and thickness are shown in Figure 2.) Due to the rapid rise of Lake level, this layer of salt has been dissolving since 1970. At the end of water- year 1973, approximately 720 million metric tons remained, but by August, 1974, only 330 million metric tons remained. The approximate maximum thickness in the summer of 1974 was three feet. '' For a discussion of minerals extracted from the Great Salt Lake, see " Extractive Industry, 1" p. 89. SOILS OF THE GREAT SALT LAKE AREA The soils surrounding the Great Salt Lake are a significant aspect of the geology of the area. Table 4 and the accompanying map present the essential information- a description of each soil association, its location, original formation, slope, vegetation, elevation, precipitation, temperature, frost- free season and uses. The numbers of the associations correspond to the numbers on the map. |