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acre-feet alluvial fans alluvial-fan aquifer altitude amount average barrier basin Bonneville Racetrack Bonneville salt crust Bonneville Salt Flats brine-collection ditches buildup carbonate muds chloride concentration conducted contains covered crystals density deposits depth determine differences direction discharge dissolved ditch system east edge estimated evaporation extend fall feet fissures flooded flow ft/d ground water gypsum halite halite and gypsum hydraulic gradient inches increase indicate infiltration Interstate Highway 80 land surface layer leakage leased located lower mainly mean measures MILES Mountains movement moving Observation percent period phreatophytes Pilot Valley playa polygons pond potassium potentiometric surface precipitation probably pumping range rates re-solution recharge recorded relatively ridges salinity salt crust Salt Lake sand sediment shallow shallow-brine aquifer shown in figure shows smooth spring subsurface summer surface brine thick thin transmissivity Turk underlying water levels western edge withdrawals zone
Seite 8 - The first part of the plain consisted simply of dried mud, with small crystals of salt scattered thickly over the surface. Crossing this, we came upon another portion of it, three miles in width, where the ground was entirely covered with a thin layer of salt in a state of deliquescence, and of so soft a consistence that the feet of our mules sank at every step into the mud beneath. But we soon came upon a portion of the plain where the salt lay in a solid state, in one unbroken sheet, extending...
Seite 8 - ... extent must have been very much greater. The salt, which was very pure and white, averaged from one-half to three-fourths of an inch in thickness, and was equal in all respects to our finest specimens for table use. Assuming these data, the quantity that here lay upon the ground in one body, exclusive of that in a deliquescent state, amounted to over four and a-half millions of cubic yards, or about one hundred millions of bushels.
Seite 8 - During our stay here, it rained almost every day and night. The salt plain, which before had glistened in the sunlight like a sheet of molten silver, now became black and sombre; the salt, over which we had passed with so much ease dissolved, and the flat, in places, became almost impassable.
Seite 4 - The present intensive investigation was made by the Water Resources Division of the US Geological Survey in cooperation with the Central and Southern Florida Flood Control District.
Seite 8 - ... at every step into the mud beneath. But we soon came upon a portion of the plain where the salt lay in a solid state, in one unbroken sheet, extending apparently to its western border. So firm and strong was this unique and snowy floor, that it sustained the weight of our entire train, without at the least giving way or cracking beneath the pressure. Our mules walked upon it as upon a sheet of solid ice.
Seite 8 - ... of our entire train, without in the least giving way or cracking beneath the pressure. Our mules walked upon it as upon a sheet of solid ice. The whole field was crossed by a network of little ridges, projecting about half an inch, as if the salt had expanded in the process of crystallization. I estimated this field to be at least seven miles wide and ten miles in length. How much farther it extended northward I could not tell ; but if it covered the plain in that direction as it did where we...
Seite 1 - Pilot Valley playa are concentrated in three zones: (1) a carbonate zone composed mainly of authigenic clay-size carbonate minerals. (2) a sulfate zone composed mainly of authigenic gypsum, and (3) a chloride zone composed of crystalline halite (the salt crust). Five major types of salt crust were recognized on the Salt Flats, but only one type was observed in Pilot Valley, (ieomorphir differences in the salt crust are caused by differences in their hydrologic environments.
Seite 2 - The increase in salinity toward areas of salt crust reflects the natural direction of brine movement through the aquifer toward the natural discharge area.
Seite 11 - SWViSEViNW'/t sec. 19, T. 1 S., R. 17 W. Sites where hydrologic data were collected are numbered in the same manner, but three letters are used after the section number and no serial number is used. The numbering system is illustrated in figure 4. THE PLAYA ENVIRONMENT TOPOGRAPHY AND SURFACE DRAINAGE The Great Salt Lake Desert is in the Great Basin section of the Basin and Range physiographic province iFenneman, 1931, pl.
Seite 2 - Flats to its original state prior to man.s activities in the area. INTRODUCTION The Bonneville Salt Flats and Pilot Valley are in the western part of the Great Salt Lake Desert in northwest Utah. (See fig. 1.) The salt crust in the Pilot Valley is about 20 miles northwest of the salt crust of the Bonneville Salt Flats and the two areas are separated by the Silver lsland Mountains.