Construction and operation of cable-chain drag for nest searches
K.F. Higgins, L.M. Kirsch, Harold F. Duebbert, A. Klett
1977, Wildlife Leaflet 512
A list of materials necessary to build and use a 53-m-long cable-chain drag is presented. Techniques are described for searching, finding, and marking nests in a typical area of grassland.During nine nesting seasons, 7,894 nests representing 32 species were found by searching fields with cable-chain drags. Only 2% of the...
New fishery research center
R. L. Herman
1977, Fisheries (2) 22-23
No abstract available....
Biotransformation and elimination of the herbicide dinitramine in carp
L.E. Olson, J. L. Allen, J.W. Hogan
1977, Journal of Agricultural and Food Chemistry (25) 554-556
No abstract available....
Changes in yellow perch (Perca flavescens) populations of Lake Michigan, 1954-75
LaRue Wells
1977, Journal of the Fisheries Research Board of Canada (34) 1821-1829
In the early and mid-1960s the abundance of yellow perch (Perca flavescens) in Lake Michigan declined abruptly. The decline began in the northern part of the lake and spread progressively southward. Circumstantial evidence suggests that the nonnative alewife (Alosa pseudoharengus), by interfering with perch reproduction, was the primary cause of...
Demographic features of a lapland longspur population near Barrow, Alaska
Thomas W. Custer, Frank A. Pitelka
1977, The Auk (94) 505-525
Breeding density, clutch size, hatching and fledging success, and survival of adult Lapland Longspurs (Calcarius lapponicus) were monitored over a 7-year period near the Naval Arctic Research Laboratory, Barrow, Alaska. Nesting begins as soon as the tundra starts to clear of snow and appears to be timed so that the...
Use of natural basin wetlands by breeding waterfowl in North Dakota
H.A. Kantrud, R. E. Stewart
1977, Journal of Wildlife Management (41) 243-253
Use of basin wetlands by breeding populations of 12 species of waterfowl was investigated in 1965 and during 1967-69 throughout the prairie pothole region of North Dakota. Data were obtained primarily by random sampling techniques. Of the total population occupying natural basin wetlands 55 percent occupied seasonal and 36 percent...
Abnormal tooth development in a sea lamprey
Patrick J. Manion, Lee H. Hanson
1977, Progressive Fish-Culturist (39) 127-128
Sea lampreys en route to their spawning grounds have been captured at mechanical or electrical structures that have been in operation for 1 to 27 spawning seasons (1949-75) on some 167 tributaries of the upper Great Lakes; more than 750,000 were taken in 1949-70 (Smith 1971). Among these lampreys...
Upland nesting of American bitterns, marsh hawks, and short-eared owls
Harold F. Duebbert, J. T. Lokemoen
1977, Prairie Naturalist (9) 33-40
No abstract available....
Gas-liquid chromatographic determination of residues of m-aminobenzoic methanesulfonate acid ethyl ester in fish
J.B. Sills, C.W. Luhning
1977, Journal of the Association of Official Analytical Chemists (60) 961-962
Abstract has not been submitted...
Orientale and Caloris
J.F. McCauley
1977, Physics of the Earth and Planetary Interiors (15) 220-250
Applications of experimental explosion-crater data to Orientale and recent geologic mapping of the basin have produced a new stratigraphy and genetic model for Orientale that are also applicable to Caloris. The inner-basin scarp of Orientale is thought to be a bench separating the upper parts of the basin from its...
Fluoride content of clay minerals and argillaceous earth materials
Josephus Thomas Jr., H.D. Glass, W.A. White, R.M. Trandel
1977, Clays and Clay Minerals (25) 278-284
A reliable method, utilizing a fluoride ion-selective electrode, is described for the determination of fluoride in clays and shales. Interference by aluminum and iron is minimal. The reproducibility of the method is about ±5% at different levels of fluoride concentration.Data are presented for various clay minerals and for the <2-µm...
Square wave voltammetry at the dropping mercury electrode: Theory
J. H. Christie, J.A. Turner, R. A. Osteryoung
1977, Analytical Chemistry (49) 1899-1903
The theoretical aspects of square wave voltammetry at the dropping mercury electrode are presented. The technique involves scanning the entire potential range of interest on a single drop of a DME. Asymmetries in the waveform as well as variations in current measurement parameters are discussed. Indications are that previous uses...
History of the Pasamonte achondrite: Relative susceptibility of the SmNd, RbSr, and UPb systems to metamorphic events
D.M. Unruh, N. Nakamura, M. Tatsumoto
1977, Earth and Planetary Science Letters (37) 1-12
The RbSr, SmNd, and UPb systematics of the eucrite Pasamonte have been studied in order to investigate the relative susceptibility of the different systems to post-crystallization events and to...
Moon-Mercury: Large impact structures, isostasy and average crustal viscosity
G. G. Schaber, J. M. Boyce, N.J. Trask
1977, Physics of the Earth and Planetary Interiors (15) 189-201
Thirty-five craters and basins larger than 200 km in diameter are recognized on the imaged portion (45%) of Mercury. If the unimaged portion of the planet is similarly cratered, a total of 78 such impact features may be present. Sixty-two craters and basins 200 km in diameter are recognized on...
Mechanical and hydraulic properties of rocks related to induced seismicity
P. A. Witherspoon, J.E. Gale
1977, Engineering Geology (11) 23-55
Witherspoon, P.A. and Gale, J.E., 1977. Mechanical and hydraulic properties of rocks related to induced seismicity. Eng. Geol., 11(1): 23-55. The mechanical and hydraulic properties of fractured rocks are considered with regard to the role they play in induced seismicity. In many cases, the mechanical properties of fractures determine the...
Techniques for the conversion to carbon dioxide of oxygen from dissolved sulfate in thermal waters
N.L. Nehring, P.A. Bowen, A.H. Truesdell
1977, Geothermics (5) 63-66
The fractionation of oxygen isotopes between dissolved sulfate ions and water provides a useful geothermometer for geothermal waters. The oxygen isotope composition of dissolved sulfate may also be used to indicate the source of the sulfate and processes of formation. The methods described here for separation, purification and reduction of...
Measured oxygen fugacities of the Angra dos Reis achondrite as a function of temperature
R. Brett, Huebner J. Stephen, M. Sato
1977, Earth and Planetary Science Letters (35) 363-368
Measurements of the oxygen fugacity (ƒO2) as a function of temperature (T) were made on an interior bulk sample of the cumulate achondrite, Angra dos Reis. Data clustered between theƒO2-T relationship of the iron-wüstite assemblage and 1.2 log atm units above iron-wüstite....
Uranium and coexisting element behaviour in surface waters and associated sediments with varied sampling techniques used for uranium exploration
K.J. Wenrich-Verbeek
1977, Journal of Geochemical Exploration (8) 337-355
Optimum sampling methods in surface water and associated sediments for use in uranium exploration are being studied at thirty sites in Colorado, New Mexico, Arizona and Utah. For water samples, filtering is recommended to increase sample homogeneity and reproducibility because for most elements studied water samples which were allowed...
Application of gold compositional analyses to mineral exploration in the United States
J.C. Antweiler, W. L. Campbell
1977, Journal of Geochemical Exploration (8) 17-29
Native gold is a mineral composed of Au, Ag and Cu in solid solution and it usually contains one or more trace metals as lattice impurities, as mineral inclusions, in grain boundaries or in surface coatings. Alloy proportions of Au, Ag and Cu, together with certain other elements, can...
Further paleomagnetic results for the San Juan volcanic field of southern Colorado
M. E. Beck Jr., S.D. Sheriff, J. F. Diehl, E.A. Hailwood, P. W. Lipman
1977, Earth and Planetary Science Letters (37) 124-130
Combining paleomagnetic data for 17 new sites from the northwest portion of the (Oligocene) San Juan volcanic field of southern Colorado with data for 29 sites previously published yields a paleomagnetic pole at 85°N, 114°E (with a 95% confidence circle of...
Geothermal reservoir temperatures estimated from the oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes
W.F. McKenzie, A.H. Truesdell
1977, Geothermics (5) 51-61
The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested as a geothermometer in three areas of the western United States. Limited analyses of spring and borehole fluids and existing experimental rate studies suggest that dissolved sulfate and water are probably in...
Ore transport and deposition in the Red Sea geothermal system: a geochemical model
Wayne C. Shanks III, J. L. Bischoff
1977, Geochimica et Cosmochimica Acta (41) 1507-1519
Thermodynamic calculation of distribution of dissolved aqueous species in the Red Sea geothermal brine provides a model of ore transport and deposition in good agreement with observed accumulations of base metal sulfides, anhydrite, and barite.The Red Sea brine is recirculated seawater that acquires high salinity by low-temperature interaction with Miocene...
Revised age for Midway volcano, Hawaiian volcanic chain
G. B. Dalrymple, D.A. Clague, M. A. Lanphere
1977, Earth and Planetary Science Letters (37) 107-116
New conventional K-Ar,40Ar/39Ar, and petrochemical data on alkalic basalt pebbles from the basalt conglomerate overlying tholeiitic flows in the Midway drill hole show that Midway evolved past the tholeiitic shield-building stage and erupted lavas of the alkalic suite27.0 ± 0.6m.y. ago. The data also show that previously published conventional K-Ar ages...
Radioactive springs geochemical data related to uranium exploration
R. A. Cadigan, J.K. Felmlee
1977, Journal of Geochemical Exploration (8) 381-395
Radioactive mineral springs and wells at 33 localities in the States of Colorado, Utah, Arizona and New Mexico in the United States were sampled and studied to obtain geochemical data which might be used for U exploration.The major source of radioactivity at mineral spring sites is 226Ra. Minor amounts...
Long-term adequacy of metal resources
D.A. Singer
1977, Resources Policy (3) 127-133
Although the earth's crust contains vast quantities of metals, extraction technologies and associated costs are inextricably bound to three fundamental geological factors — the amount of metal available in the earth's crust in each range of grades, the mineralogical form and chemical state of the metal, and the spatial distribution...
