assisted with the identification of a fossil jawbone recovered from collected core.Numerous current and former U.S. Geological Survey colleagues assisted with various aspects of this study. Cheryl Eddy-Miller and Scott Edmiston installed the instrumentation used to continuously measure groundwater levels in three monitoring wells installed for this study. Cheryl Eddy-Miller, Greg Boughton, Peter Wright, and Scott Edmiston assisted with groundwater-quality sampling. Greg Stanton and Jonathan Thomas completed the borehole geophysical surveys. Colleague reviews of the full report by Janet Carter and Kent Becher and of parts of the report section "Response of Groundwater Levels to Atmospheric Loading and Earth Tides" by Fred Day-Lewis and Paul Hsieh improved the quality of the report. Suzanne Roberts created the illustrations.
Cover. Background photograph: Cliff in upper part of photograph is composed of rocks of the Alkali Creek Tongue of the Wasatch Formation and the Farson Sandstone Member of the Green River Formation. Ridge on top of the bluff is composed of sandstone that is more resistant to weathering than other rocks composing the geologic formations. Sandstone beds in both geologic units are important aquifers in the Green River structural basin. Sagebrush in foreground of photograph rests on rocks composing the main body of the Wasatch Formation. Photograph by Jennifer Beck, U.S. Geological Survey. Upper left photograph: Livestock drinking water from a small surface impoundment. Water in the impoundment was provided by a nearby stock well. Photograph by Michelle Taylor, formerly of the U.S. Geological Survey. Lower left photograph: Stock well in protective corrugated steel culvert and associated solar panel. Electrical power generated by solar panels provides power to operate submersible pumps installed in many stock wells in the Green River structural basin. Green tape reel located to the left of the corrugated culvert holds the black electrical tape used to measure groundwater levels in wells. Photograph by Sarah Davis, U.S. Geological Survey. Right photograph: Measurement of groundwater level in a stock well. Corrugated steel culvert has been used to surround and protect the wellhead. Water pumped from the well is delivered to the stock trough in the foreground via the two pipes coming out of the side of the corrugated culvert. Photograph by Kathy Foster, formerly of the U.S. Geological Survey.
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