234U and 238U concentration in brine from geopressured aquifers of the northern Gulf of Mexico basin
T. F. Kraemer
1981, Earth and Planetary Science Letters (56) 210-216
The234U and238U concentration in brine from six Gulf Coast geopressured aquifers has been determined. The results reveal very low uranium concentrations (from 0.003 to 0.03 μg/l) and uranium activity ratios slightly greater than unity (from 1.06 to 1.62). Reducing conditions within the aquifers are responsible for the low uranium concentrations....
Determination of tetraalkyllead compounds in gasoline by liquid chromatography-atomic absorption spectrometry
J. D. Messman, T. C. Rains
1981, Analytical Chemistry (53) 1632-1636
A liquid chromatography-atomic absorption spectrometry (LC-AAS) hybrid analytical technique is presented for metal speciation measurements on complex liquid samples. The versatility and inherent metal selectivity of the technique are Illustrated by the rapid determination of five tetraalkyllead compounds in commercial gasoline. Separation of the individual tetraalkyllead species is achieved by...
Spectroscopy and decay dynamics of several methyl-and fluorine-substituted benzene radical cations
V.E. Bondybey, C. Vaughn, T.A. Miller, J.H. English, R.H. Shiley
1981, Journal of the American Chemical Society (103) 6303-6307
Spectra of several fluorobenzene cation radicals containing 1-3 methyl substituents were observed in solid Ne matrix and analyzed. Comparisons between these compounds and other fluorobenzenes studied previously as well as comparisons between the Β~ state lifetimes in the gas phase and in the matrix are used to gain a deeper...
Estimation of impervious-area washoff parameters
William M. Alley
1981, Water Resources Research (17) 1161-1166
In recent years many models have been developed which simulate the quality of rainfall runoff from urban areas. Common to many of these models is the use of an exponential washoff equation. This washoff equation is often modified by an availability equation to account for the effects of runoff intensity...
Dairy-processing wastes as a replacement protein source in diets of rainbow trout
G. L. Rumsey, M. Cacace, R. R. Zall, D. J. Lisk
1981, Progressive Fish-Culturist (43) 86-88
Dairy‐processing wastes, not previously used in domestic animal and fish feeds, were evaluated as a replacement protein source in the diet of rainbow trout (Salmo gairdneri). Dairy residue replaced 10% dried whey without reducing growth or feed efficiency, and feed costs were reduced. Growth and feeding efficiency were somewhat reduced...
Sudden death at the end of the Mesozoic
C. Emiliani, E.B. Kraus, E.M. Shoemaker
1981, Earth and Planetary Science Letters (55) 317-334
A paleoecological analysis of the fossil record before and after the Cretaceous/Tertiary boundary indicates that the widespread extinctions and biological stresses around the boundary are best explained in terms of a sudden, significant, but short temperature rise. L. Alvarez and co-authors, having...
Sand waves on an epicontinental shelf: Northern Bering Sea
Michael E. Field, C. Hans Nelson, David A. Cacchione, David E. Drake
1981, Marine Geology (32) 233-258
Sand waves and current ripples occupy the crests and flanks of a series of large linear sand ridges (20 km × 5 km × 10 m high) lying in an open-marine setting in the northern Bering Sea. The sand wave area, which lies west of Seward Peninsula and southeast of...
Petroleum geology of Cook Inlet basin: An exploration model
Leslie B. Magoon, George E. Claypool
1981, American Association of Petroleum Geologists Bulletin (65) 1043-1061
Oil exploration commenced onshore adjacent to lower Cook Inlet on the Iniskin Peninsula in 1900, shifted with considerable success to upper Cook Inlet from 1957 through 1965, then returned to lower Cook Inlet in 1977 with the COST well and Federal OCS sale. Lower Cook Inlet COST No. 1 well,...
A numerical inversion of the Laplace transform solution to radial dispersion in a porous medium
A.F. Moench, A. Ogata
1981, Water Resources Research (17) 250-252
A special form of the numerical inversion of the Laplace transform described by Stehfest (1970) is applied to the transformed solution of dispersion in a radial flow system in a porous medium. The inversion is extremely simple to use because the weighting coefficients depend only on the number of terms...
Arid land monitoring using Landsat albedo difference images
Charles J. Robinove, Pat S. Chavez Jr., Dale G. Gehring, Ralph Holmgren
1981, Remote Sensing of Environment (11) 133-156
The Landsat albedo, or percentage of incoming radiation reflected from the ground in the wavelength range of 0.5 [mu]m to 1.1 [mu]m, is calculated from an equation using the Landsat digital brightness values and solar irradiance values, and correcting for atmospheric scattering, multispectral scanner calibration, and sun angle. The albedo...
Downhole measurements and fluid chemistry of a castle rock steam well, the Geysers, Lake County, California
A.H. Truesdell, M. Nathenson, G.A. Frye
1981, Geothermics (10) 103-114
Wellbore and reservoir processes in a steam well in the Castle Rock field of The Geysers have been studied by means of down-hole pressure and temperature measurements and analyses of ejected water and steam produced under bleed and full flow. Down-hole measurements show that below a vapor zone there is...
Toxicity of volcanic-ash leachate to a blue-green alga. Results of a preliminary bioassay experiment
Diane M. McKnight, G. L. Feder, E.A. Stiles
1981, Environmental Science & Technology (15) 362-364
No abstract available....
Magnetic signals from the core of the earth and secular variation
L.R. Alldredge
1981, Journal of Geophysical Research Solid Earth (86) 7957-7965
An oscillating, radial magnetic dipole source was assumed to exist in the core of the earth, 100 km beneath the core-mantle boundary. As an approximation, electromagnetic propagation was assumed in the core in lieu of hydromagnetic propagation, which could not be used because of unknown internal fields.Using Debye potentials, the...
Boulder deposits and the retreat of mountain slopes, or ' gully gravure' revisited
H. H. Mills
1981, Journal of Geology (89) 649-660
Observations on mountains composed chiefly of shale and capped with Tuscarora Sandstone in the Valley and Ridge province of southwest Virginia suggest that slopes retreat by a process similar to but different from Bryan's (1940) "gully gravure." The process appears to operate as follows: Bouldery alluvium protects the floors of...
Two-mica granites of northeastern Nevada
D. E. Lee, R. W. Kistler, I. Friedman, R. E. Van Loenen
1981, Journal of Geophysical Research Solid Earth (86) 10607-10616
The field settings are described and analytical data are presented for six two-mica granites from north-eastern Nevada. High δ18O and 87Sr/86Sr values indicate that all are S-type granites, derived from continental crust. The major element chemistry and accessory mineral contents of these rocks also are characteristic of S-type granites. Chemical, X...
Paleoclimatic implications of Late Pleistocene marine ostracodes from the St. Lawrence lowlands.
T. M. Cronin
1981, Micropaleontology (27) 384-418
Using modern zoogeographic data and inferred temperature ranges for Champlain Sea ostracode species, bottom water paleotemperatures were estimated for three phases of deposition of this inland sea. The temporal distribution of these and other environmentally diagnostic species in Champlain Sea deposits reveals a significant local climatic change in the Champlain...
Geodetic analysis of reservoir depletion at the Geyser steam field in northern California
R.P. Denlinger, W.F. Isherwood, R. L. Kovach
1981, Journal of Geophysical Research Solid Earth (86) 6091-6096
Reservoir depletion at the Geysers from 1974 to 1977 is evident in measured changes in gravity, surface strain, and pore pressure drainage. The drainage area increased about 20%, the maximum gravity decrease was about −120 μGal, and the maximum elevation change was about 6 cm during this period. Since the...
Pyrolysis gas chromatography-mass spectrometry to characterize organic matter and its relationship to uranium content of Appalachian Devonian black shales
J.S. Leventhal
1981, Geochimica et Cosmochimica Acta (45) 883-889
Gas Chromatographic analysis of volatile products formed by stepwise pyrolysis of black shales can be used to characterize the kerogen by relating it to separated, identified precursors such as land-derived vitrinite and marine-source Tasmanites. Analysis of a Tasmanites sample shows exclusively n-alkane">n-alkane and -alkene pyrolysis products, whereas a vitrinite...
Geographic distribution and dispersal of normapolles genera in North America
R.H. Tschudy
1981, Review of Palaeobotany and Palynology (35) 283-314
Normapolles pollen have been found in North America in Cretaceous and Lower Tertiary rocks from the eastern Atlantic Seaboard, the Mississippi embayment region and from the states and provinces from western North America as far north as the District of Mackenzie, Northwest Territories. Previous postulates relating to the Normapolles floral...
Rank of coal beds of the Narragansett basin, Massachusetts and Rhode Island
P.C. Lyons, H.B. Chase Jr.
1981, International Journal of Coal Geology (1) 155-168
Coal of the Narragansett basin generally has been considered to be anthracite and/or meta-anthracite. However, no single reliable method has been used to distinguish these two ranks in this basin. Three methods — chemical, X-ray, and petrographic — have been used...
Uranium in big sagebrush from western U.S. and evidence of possible mineralization in the Owyhee mountains of Idaho
J. A. Erdman, G.H. Harrach
1981, Journal of Geochemical Exploration (14) 83-94
Two regional studies of big sagebrush (Artemisia tridentata), a widely distributed and dominant shrub in the western United States, have shown its responsiveness to known uranium mineralization in the Monument Hill and Pumpkin Buttes districts of the southern Powder River Basin, Wyoming, and the Uravan mineral belt area in southeastern...
K-Ar ages on intrusive and altered zones in the Chignik and Sutwik Island quadrangles: A section in The United States Geological Survey in Alaska: Accomplishments during 1979
Frederic H. Wilson
1981, Report, The United States Geological Survey in Alaska: Accomplishments during 1979 (Circular 823-B)
Continued K-Ar dating of intrusive rocks and hydrothermal alteration zones in the Chignik and Sutwik Island quadrangles of the Alaska Peninsula, supplemental to that by Wilson, Detterman, and Silberman (1978) and Wilson (1978), has refined our knowledge of the ages of the igneous rocks and clarified relations between altered zones...
Designation of principal water-supply aquifers in Minnesota
D. G. Adolphson, J. F. Ruhl, R. J. Wolf
1981, Water-Resources Investigations Report 81-51
Fourteen aquifers, ranging from Quaternary to Precambrian in age, have been identified as the principal sources of water to wells in Minnesota. Half the municipal population anc nearly all the rural population depend on water from these aquifers. Buried and surficial sand and gravel aquifers of Quaternary age occur in...
Electrical properties of granite with implications for the lower crust
G.R. Olhoeft
1981, Journal of Geophysical Research Solid Earth (86) 931-936
The electrical properties of granite appear to be dominantly controlled by the amount of free water in the granite and by temperature. Minor contributions to the electrical properties are provided by hydrostatic and lithostatic pressure, structurally bound water, oxygen fugacity, and other parameters. The effect of sulfur fugacity may be...
Seepage study of the Sevier River and the Central Utah, McIntyre, and Leamington Canals, Juab and Millard Counties, Utah
L. R. Herbert, R.W. Cruff, Walter F. Holmes
1981, Open-File Report 81-820
A study of the gains or losses of the Sevier River and the Central Utah, McIntyre, and Leamington Canals in the Leamington area, in Juab and Millard Counties, Utah, was made to determine changes in those reaches. Three to seven sets of seepage measurements made during 1980 were used in...
