Author: S. R. Anderson
Publisher:
ISBN:
Category : Geological time
Languages : en
Pages : 46
Book Description
Geologic Ages and Accumulation Rates of Basalt-flow Groups and Sedimentary Interbeds in Selected Wells at the Idaho National Engineering Laboratory, Idaho
Author: S. R. Anderson
Publisher:
ISBN:
Category : Geological time
Languages : en
Pages : 46
Book Description
Publisher:
ISBN:
Category : Geological time
Languages : en
Pages : 46
Book Description
Geologic Ages and Accumulation Rates of Basalt-flow Groups and Sedimentary Interbeds in Selected Wells at the Idaho National Engineering Laboratory, Idaho
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
Book Description
Geologic ages and accumulation rates, estimated from regressions, were used to evaluate measured ages and interpreted stratigraphic and structural relations of basalt and sediment in the unsaturated zone and the Snake River Plain aquifer at the Idaho National Engineering Laboratory (INEL) in eastern Idaho. Geologic ages and accumulation rates were estimated from standard linear regressions of 21 mean potassium-argon (K-Ar) ages, selected mean paleomagnetic ages, and cumulative depths of a composite stratigraphic section composed of complete intervals of basalt and sediment that were deposited in areas of past maximum subsidence. Accumulation rates also were estimated from regressions of stratigraphic intervals in three wells in and adjacent to an area of interpreted uplift at and near the Idaho Chemical Processing Plant (ICPP) and the Test Reactor Area (TRA) to allow a comparison of rates in areas of past uplift and subsidence. Estimated geologic ages range from about 200 thousand to 1.8 million years before present and are reasonable approximations for the interval of basalt and sediment above the effective base of the aquifer, based on reported uncertainties of corresponding measured ages. Estimated ages between 200 and 800 thousand years are within the range of reported uncertainties for all 15 K-Ar ages used in regressions and two out of three -argon (4°Ar/39Ar) ages of duplicate argon samples. Two sets of estimated ages between 800 thousand and 1.8 million years are within the range of reported uncertainties for all seven K-Ar ages used in regressions, which include one shared age of about 800 thousand years. Two sets of ages were estimated for this interval because K-Ar ages make up two populations that agree with previous and revised ages of three paleomagnetic subchrons. The youngest set of ages is consistent with a K-Ar age from the effective base of the aquifer that agrees with previous ages of the Olduvai Normal-Polarity Subchron.
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
Book Description
Geologic ages and accumulation rates, estimated from regressions, were used to evaluate measured ages and interpreted stratigraphic and structural relations of basalt and sediment in the unsaturated zone and the Snake River Plain aquifer at the Idaho National Engineering Laboratory (INEL) in eastern Idaho. Geologic ages and accumulation rates were estimated from standard linear regressions of 21 mean potassium-argon (K-Ar) ages, selected mean paleomagnetic ages, and cumulative depths of a composite stratigraphic section composed of complete intervals of basalt and sediment that were deposited in areas of past maximum subsidence. Accumulation rates also were estimated from regressions of stratigraphic intervals in three wells in and adjacent to an area of interpreted uplift at and near the Idaho Chemical Processing Plant (ICPP) and the Test Reactor Area (TRA) to allow a comparison of rates in areas of past uplift and subsidence. Estimated geologic ages range from about 200 thousand to 1.8 million years before present and are reasonable approximations for the interval of basalt and sediment above the effective base of the aquifer, based on reported uncertainties of corresponding measured ages. Estimated ages between 200 and 800 thousand years are within the range of reported uncertainties for all 15 K-Ar ages used in regressions and two out of three -argon (4°Ar/39Ar) ages of duplicate argon samples. Two sets of estimated ages between 800 thousand and 1.8 million years are within the range of reported uncertainties for all seven K-Ar ages used in regressions, which include one shared age of about 800 thousand years. Two sets of ages were estimated for this interval because K-Ar ages make up two populations that agree with previous and revised ages of three paleomagnetic subchrons. The youngest set of ages is consistent with a K-Ar age from the effective base of the aquifer that agrees with previous ages of the Olduvai Normal-Polarity Subchron.
Water-resources Investigations Report
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 598
Book Description
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 598
Book Description
Geology, Hydrogeology, and Environmental Remediation
Author: P. K. Link
Publisher: Geological Society of America
ISBN: 9780813723532
Category : Science
Languages : en
Pages : 326
Book Description
Publisher: Geological Society of America
ISBN: 9780813723532
Category : Science
Languages : en
Pages : 326
Book Description
Volcanic and Tectonic Hazard Assessment for Nuclear Facilities
Author: Charles B. Connor
Publisher: Cambridge University Press
ISBN: 0521887976
Category : Nature
Languages : en
Pages : 671
Book Description
A summary of the current state-of-the-art in volcanic and tectonic hazard assessment of nuclear facilities for researchers, geologists and engineers.
Publisher: Cambridge University Press
ISBN: 0521887976
Category : Nature
Languages : en
Pages : 671
Book Description
A summary of the current state-of-the-art in volcanic and tectonic hazard assessment of nuclear facilities for researchers, geologists and engineers.
Stratigraphy of the Unsaturated Zone and the Snake River Plain Aquifer at and Near the Idaho National Engineering Laboratory, Idaho
Author: S. R. Anderson
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 74
Book Description
New Publications of the Geological Survey
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 334
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 334
Book Description
New Publications of the U.S. Geological Survey
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 72
Book Description
Geologic Controls of Hydraulic Conductivity in the Snake River Plain Aquifer at and Near the Idaho National Engineering and Environmental Laboratory, Idaho
Author: S. R. Anderson
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 50
Book Description
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 50
Book Description
Publications of the Geological Survey
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 390
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 390
Book Description