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首页> 美国政府科技报告 >Characterization of the Structure, Clean-Sand Percentage, Dissolved-Solids Concentrations, and Estimated Quantity of Groundwater in the Upper Cretaceous Nacatoch Sand and Tokio Formation, Arkansas
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Characterization of the Structure, Clean-Sand Percentage, Dissolved-Solids Concentrations, and Estimated Quantity of Groundwater in the Upper Cretaceous Nacatoch Sand and Tokio Formation, Arkansas

机译：阿肯色州上白垩纪Nacatoch砂和Tokio地层的结构，清洁砂百分比，溶解固体浓度和地下水估计量的表征

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The purpose of this report is to determine the quality and quantity of saline groundwater available in the Cretaceous Nacatoch Sand and Tokio Formation of the West Gulf Coastal Plain and Mississippi embayment in the State of Arkansas. This study summarizes the geologic, geohydrologic, and water-quality data available from the aquifers and documents the geologic structure, thickness, clean-sand percentage of the total formation thickness, and dissolved-solids concentrations as interpreted from borehole geophysical logs. The Nacatoch Sand and Tokio Formation were chosen because they are the principal aquifers of the Upper Cretaceous in Arkansas. The scope of this report is focused within the boundaries of the State of Arkansas, although data in northern Louisiana were considered. Aquifers of similar age located within the Mississippi embayment east of the Mississippi River are not discussed because they are of a different sediment provenance and are disconnected from their counterparts in Arkansas by the axis of the Mississippi embayment. The scope of the investigation is limited to the formations within the Cretaceous system that are currently used for groundwater withdrawal and could potentially provide large amounts of groundwater for withdrawal.

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