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Page 4844, results 121076 - 121100

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Dwornikite, (Ni,Fe)SO 4 .H 2 O, a member of the kieserite group from Minasragra, Peru
C. Milton, H. T. Evans Jr., R. G. Johnson
1982, Mineralogical Magazine (46) 351-355
A new nickel sulphate monohydrate is described from V-sulphide ore from Minasragra; it occurs associated with patronite (VS 2 ) with various sulphates, sulphur and bitumen. Dwornikite forms fine-grained white aggregates mixed with other oxidation products. Indexed X-ray powder data are tabulated; strongest lines 3.342(100) , 4.732(70), 3.024(70), 4.754(50), 3.293(35), 2.491(35) A;...
Changes in vegetation structure in seeded nesting cover in the prairie pothole region
K.F. Higgins, W.T. Barker
1982, Special Scientific Report - Wildlife 242
A sample of 365 stands of seeded nesting cover (mixtures of cool-season grasses and legumes) was studied in the glaciated prairie pothole region during 1977-79. Measurements of species composition, canopy cover, plant height, and visual obstruction values differed with stand age but only in a general way when results from...
Accumulation and loss of 2' ,5-dichloro-4'-nitrosalicylanilide (Bayer 73) by fish: laboratory studies
Verdel K. Dawson, Joe B. Sills, Charles W. Luhning
1982, Investigations in Fish Control 90
Residues of the 2-aminoethanol salt of 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73), as determined by gas-liquid chromatography, were rapidly accumulated by fish exposed to the lampricide -in blood plasma, gallbladder bile, and muscle tissue of coho salmon (Oncorhynchus kisutch) and rainbow trout (Salmo gairdneri), and in bile and muscle of channel catfish (Ictalurus...
Electric fences to reduce mammalian predation on waterfowl nests
J. T. Lokemoen, Harold A. Doty, D.E. Sharp, J.E. Neaville
1982, Wildlife Society Bulletin (10) 318-323
We evaluated electric fences as predator barriers to reduce high losses of waterfowl nests to mammalian predation at Waterfowl Production Areas (WPAs). The work was done in 1978-81 on 3 paired sites in central North Dakota and western Minnesota. Resident mammalian predators were trapped from inside the exclosures. All 3...
Evaluation of 0.46- to 2.36-mu m multispectral scanner images of the east Tintic mining district, Utah, for mapping hydrothermally altered rocks
L. C. Rowan, A.B. Kahle
1982, Economic Geology (77) 441-452
Airborne multispectral scanner images recorded in the 0.46- to 2.36-mu m region for the East Tintic mining district, Utah, were evaluated to determine their usefulness for distinguishing six types of hydrothermally altered rocks from a wide range of sedimentary and igneous rock types. Limestone, dolomite, and argillaceous rocks were of...
A new instrument for sampling flocculent material at the water/sediment interface
Michael H. Bothner, Page C. Valentine
1982, Journal of Sedimentary Research (52) 639-640
We have designed an instrument to collect fine-grained and flocculent material from the water/sediment interface for chemical and mineralogical analysis. The sampler can be used from a manned research submersible or by a diver in shallow water. In areas of active deposition, the material collected represents the most recently deposited...
Evolution of continental crust and mantle heterogeneity: Evidence from Hf isotopes
Patchett P. Jonathan, O. Kouvo, C. E. Hedge, M. Tatsumoto
1982, Contributions to Mineralogy and Petrology (78) 279-297
We present initial 176Hf/177 Hf ratios for many samples of continental crust 3.7-0.3 Gy old. Results are based chiefly on zircons (1% Hf) and whole rocks: zircons are shown to be reliable carriers of essentially the initial Hf itself when properly chosen on the basis of U-Pb studies. Pre-3.0 Gy...
International geomagnetic reference field 1980: a report by IAGA Division I working group.
N.W. Peddie
1982, Geophysical Journal of the Royal Astronomical Society (68) 265-268
Describes the recommendations of the working group, which suggested additions to IGRF because of the cumulative effect of the inevitable uncertainties in the secular variation models which had led to unacceptable inaccuracies in the IGRF by the late 1970's. The recommendations were accepted by the International Association of Geomagnetism and...
Evaluating depth to shallow groundwater using Heat Capacity Mapping Mission (HCMM) data
J. L. Heilman, Donald G. Moore
1982, Photogrammetric Engineering and Remote Sensing (48) 1903-1906
Four dates of Heat Capacity Mapping Mission (HCMM) data were analyzed to evaluate the utility of HCMM thermal data for evaluating depth to shallow groundwater. During the summer, shallow water tables can create lower soil temperatures throughout the diurnal temperature cycle. Because of large spatial and temporal ground cover variations,...
DDT poisoning in a Cooper's hawk collected in 1980
Richard M. Prouty, Oliver H. Pattee, Shelia K. Schmeling
1982, Bulletin of Environmental Contamination and Toxicology (28) 319-321
In April 1980, a Cooper's hawk (Accipiter cooperii) was found on the ground in Lakewood, Colorado, unable to fly and in convulsion. The bird died shortly thereafter. The hawk was packed in dry ice and shipped air express to the Fish and Wildlife Service, U. S. Department of the Interior,...
Fission-track evidence for Quaternary uplift of the Nanga Parbat region, Pakistan
P.K. Zeitler, N.M. Johnson, C. W. Naeser, R.A.K. Tahirkheli
1982, Nature (298) 255-257
The north-striking Nanga Parbat-Haramosh Massif protrudes into the northwestern Himalaya along the axis of a great syntaxis1,2 (Fig. 1), where the Hindu Kush, Karakorum, and Himalayan ranges converge. As the Indus Suture Zone3 enters this region from the east it bifurcates into two branches, encircling what may be a docked...
Organic geochemistry of core samples from an ultradeep hot well (300°C, 7 km)
Leigh C. Price
1982, Chemical Geology (37) 215-228
South Texas cores of Lower Cretaceous rocks from a depth of 6400.8 to 7544.6 m at present-day temperatures of 262–296°C have high concentrations of C15+ hydrocarbons. Bitumen coefficients range from 105 to 367 mg/g and C15+ extractable bitumen ranges from 500 to 2200 ppm. Some generation potential remains associated with the...
Differential compaction mechanism for earth fissures near Casa Grande, Arizona
R.C. Jachens, T.L. Holzer
1982, Geological Society of America Bulletin (93) 998-1012
Precise gravity measurements indicate that earth fissures or tension cracks caused by ground-water withdrawal within a 10-km2 area southeast of Casa Grande, Arizona, are associated with relief on the buried interface between the alluvial aquifer and underlying bedrock. All of the fissure zones; which...
Low-temperature formation of hydrocarbon gases in San Francisco Bay sediment (California, U.S.A.)
T.M. Vogel, R.S. Oremland, K.A. Kvenvolden
1982, Chemical Geology (37) 289-298
To understand the processes responsible for the presence of low-molecular-weight hydrocarbons (C1-C4) in anoxic environments, we studied sediments collected from an anaerobic estuarine mudflat. In these sediments methane (C1) was several orders of magnitude more abundant than all other C2-C4 hydrocarbons; the C1 (C2 + C3) ratio was ??? 13,000....
Map reading tools for map libraries.
G.L. Greenberg
1982, Information Bulletin, Western Association of Map Libraries (13) 290-300
Engineers, navigators and military strategists employ a broad array of mechanical devices to facilitate map use. A larger number of map users such as educators, students, tourists, journalists, historians, politicians, economists and librarians are unaware of the available variety of tools which can be used with maps to increase the...