Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2494
Broad trends in geomagnetic paleointensity on Hawaii during Holocene time Broad trends in geomagnetic paleointensity on Hawaii during Holocene time
Paleointensity determinations have been obtained from 22 basaltic lava flows on the island of Hawaii using the Thelliers' method. Radiocarbon dating indicates that these flows erupted at intervals ranging from about 200 to 1000 years, and results of the experiments provide an estimate of broad trends in geomagnetic paleointensity during Holocene time in the vicinity of Hawaii. Most of...
Authors
Edward A. Mankinen, Duane E. Champion
By
Natural radionuclides Natural radionuclides
No abstract available.
Authors
D. Kirk Nordstrom, Richard B. Wanty
Analytical results for As species and related elements in interstitial porewater and sediment from the Maurice River and Union Lake in Vineland, New Jersey Analytical results for As species and related elements in interstitial porewater and sediment from the Maurice River and Union Lake in Vineland, New Jersey
Union Lake, the Maurice River, and the Blackwater Branch , a tributary of the Maurice River, all parts of a small watershed near Vineland, New Jersey, are contaminated by arsenic (As) from a local chemical factory (fig. l)(Faust and others, 1987). An indepth study to be used for the design of the remedial action at the Vineland Chemical Co. Superfund site was initiated by the U.S...
Authors
W. H. Ficklin, Laurie S. Balistrieri, P. L. Hageman, C. S. Papp, D.L. Fey, Matthew Westgate
Development of 3-D lithostratigraphic and confidence models at Yucca Mountain, Nevada Development of 3-D lithostratigraphic and confidence models at Yucca Mountain, Nevada
Computerized three-dimensional geologic models of potential high-level nuclear waste repositories such as Yucca Moutain, Nevada, are important for visualizing the complex interplay of (1) thickness and facies variations in lithostratigraphic units and (2) the disruption of these units by faults. The concept of a 'model of confidence' in the lithostratigraphic model is introduced to show...
Authors
D.C. Buesch, J.E. Nelson, R. P. Dickerson, R.W. Spengler
Development of grade and tonnage models for different deposit types Development of grade and tonnage models for different deposit types
No abstract available.
Authors
Donald A. Singer
Spatial and temporal analysis of precious-metal deposit models for a mineral resource assessment of Nevada Spatial and temporal analysis of precious-metal deposit models for a mineral resource assessment of Nevada
No abstract available.
Authors
Steve Ludington, D. P. Cox, M.G. Sherlock, Donald A. Singer, Byron R. Berger, Joseph V. Tingley
The nature of mineral deposits and the development and use of deposit models The nature of mineral deposits and the development and use of deposit models
No abstract available.
Authors
Donald A. Singer, Dennis P. Cox
Geologic studies in Alaska by the U.S. Geological Survey, 1992 Geologic studies in Alaska by the U.S. Geological Survey, 1992
This collection of 19 papers continues the annual series of U.S. Geological Survey reports on the geology of Alaska. The contributions, which include full-length Articles and shorter Geologic Notes, cover a broad range of topics including dune formation, stratigraphy, paleontology, isotopic dating, mineral resources, and tectonics. Articles, grouped under four regional headings, span...
Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: Evidence from the diatom flora Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: Evidence from the diatom flora
Sediments from three gravity cores from an east-west shelf-to-slope transect along the axis of Pervenets Canyon in the northern Navarin basin, Bering Sea were analyzed for diatoms. The diatom floras present in the cores were divided into four assemblages following Sancetta (1981). The Bering Basin (deep water open ocean) and Sea Ice (ice cover at least six months per year) Assemblages...
Authors
Scott W. Starratt
The potential response of eolian sands to greenhouse warming and precipitation reduction on the Great Plains of the U.S.A. The potential response of eolian sands to greenhouse warming and precipitation reduction on the Great Plains of the U.S.A.
Sand dunes and sand sheets are extensive on the semi-arid GreatPlains but are at present stabilized by a sparse vegetation cover. Use of a dune mobility index, which incorporates wind strength and the ratio of mean annual precipitation to potential evapotranspiration, shows that under predicted greenhouse climate effects of increased temperature and reduced precipitation, sand dunes and...
Authors
D.R. Muhs, P.B. Maat