Stratigraphy of the Unsaturated Zone and the Snake River Plain Aquifer at and Near the Idaho National Engineering Laboratory, Idaho PDF Download
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Author: S. R. Anderson
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 78
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Book Description
Author: S. R. Anderson
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 78
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Book Description
Author: S. R. Anderson
Publisher:
ISBN:
Category : Basalt
Languages : en
Pages : 58
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Book Description
Author: S. R. Anderson
Publisher:
ISBN:
Category : Basalt
Languages : en
Pages : 80
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 70
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Book Description
The unsaturated zone and the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory (INEL) are made up of at least 178 basalt-flow groups, 103 sedimentary interbeds, 6 andesite-flow groups, and 4 rhyolite domes. Stratigraphic units identified in 333 wells in this 890-mile2 area include 121 basalt-flow groups, 102 sedimentary interbeds, 6 andesite-flow groups, and 1 rhyolite dome. Stratigraphic units were identified and correlated using the data from numerous outcrops and 26 continuous cores and 328 natural-gamma logs available in December 1993. Basalt flows make up about 85% of the volume of deposits underlying the area.
Author: S. R. Anderson
Publisher:
ISBN:
Category : Basalt
Languages : en
Pages : 0
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Author: S. R. Anderson
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 74
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
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A complex sequence of basalt flows and sedimentary interbeds underlies Test Area North (TAN) at the Idaho National Engineering Laboratory in eastern Idaho. Wells drilled to depths of at least 500 feet penetrate 10 basalt-flow groups and 5 to 10 sedimentary interbeds that range in age from about 940,000 to 1.4 million years. Each basalt-flow group consists of one or more basalt flows from a brief, single or compound eruption. All basalt flows of each group erupted from the same vent, and have similar ages, paleomagnetic properties, potassium contents, and natural-gamma emissions. Sedimentary interbeds consist of fluvial, lacustrine, and eolian deposits of clay, silt, sand, and gravel that accumulated for hundreds to hundreds of thousands of years during periods of volcanic quiescence. Basalt and sediment are elevated by hundreds of feet with respect to rocks of equivalent age south and cast of the area, a relation that is attributed to past uplift at TAN. Basalt and sediment are unsaturated to a depth of about 200 feet below land surface. Rocks below this depth are saturated and make up the Snake River Plain aquifer. The effective base of the aquifer is at a depth of 885 feet below land surface. Detailed stratigraphic relations for the lowermost part of the aquifer in the depth interval from 500 to 885 feet were not determined because of insufficient data. The stratigraphy of basalt-flow groups and sedimentary interbeds in the upper 500 feet of the unsaturated zone and aquifer was determined from natural-gamma logs, lithologic logs, and well cores. Basalt cores were evaluated for potassium-argon ages, paleomagnetic properties, petrographic characteristics, and chemical composition. Stratigraphic control was provided by differences in ages, paleomagnetic properties, potassium content, and natural-gamma emissions of basalt-flow groups and sedimentary interbeds.
Author: S. R. Anderson
Publisher:
ISBN:
Category : Basalt
Languages : en
Pages : 56
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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 592
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Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 754
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