Revised value for the O18 fractionation between CO2 and H2O at 25°C
James R. O’Neil, Lanford H. Adami, Samuel Epstein
1975, Journal of Research of the U.S. Geological Survey (3) 623-624
A new value of 1.0412 for the fractionation factor a between CO2 and H2O at 25°C is recommended on the basis of new data and a reevaluation of earlier published data....
Spectrochemical determination of trace elements in galena
E. L. Mosier, J.C. Antweiler, J. M. Nishi
1975, Journal of Research of the U.S. Geological Survey (3) 625-631
A semiquantitative spectrochemical method is described by means of which 10-mg samples of galena can be analyzed for their trace element content. Results on 40 elements are reported as six logarithmically spaced intervals per order of magnitude and obtained by visual comparison with standards prepared in spectrographically pure lead sulfide....
Tectonic setting of the Tertiary volcanic rocks of the Olympic Peninsula, Washington
Wallace M. Cady
1975, Journal of Research of the U.S. Geological Survey (3) 573-582
Lower and middle Eocene abyssal and Hawaiian type tholeiitic basalts form two accumulations that apparently were once far out on the east flank of the Juan de Fuca Ridge, within the Juan de Fuca plate. One of these (more than 15 km thick) is near the eastern and southeastern periphery...
Diagenesis of Miocene siliceous shales, Temblor Range, California
K. J. Murata, R.R. Larson
1975, Journal of Research of the U.S. Geological Survey (3) 553-566
Siliceous Monterey Shale and related shales of the Temblor Range, Calif., are subdivided into three depth-controlled zones characterized by different forms of silica. These are, in descending stratigraphic order: (1) Biogenic opal zone, with remains of diatoms and other siliceous organisms, (2) diagenetic cristobalite zone, and (3) diagenetic quartz zone....
Replacement barite deposit, southern Independence Mountains, Nevada
Keith B. Ketner
1975, Journal of Research of the U.S. Geological Survey (3) 547-551
Allochthonous Devonian chert, metaquartzite, and greenstone in the Blue Basin quadrangle,, southern Independence Mountains, Nevada, are mineralized with barite forming a deposit of possible commercial grade and size. Textural evidence indicates that the barite was deposited in the host rocks principally by replacement, to a lesser extent by a process...
A typical cross section based on magnetic data of lower and middle Keweenawan volcanic rocks, Ironwood area, Michigan
Elizabeth R. King
1975, Journal of Research of the U.S. Geological Survey (3) 543-546
A north-trending aeromagnetic profile of a sequence of east-striking Keweenawan volcanic rocks near Ironwood, Mich., can be matched to a calculated profile over a model consisting of a series of dipping layers. (The dips were those measured by H. A. Hubbard along the north-trending valley of the Black River.) Remanent...
Lower Keweenawan volcanic rocks of Michigan and Wisconsin
Harold A. Hubbard
1975, Journal of Research of the U.S. Geological Survey (3) 541
Unconformable sequences of Keweenawan volcanic rocks occur in Michigan and adjacent Wisconsin. The sequences differ in types of rocks, magnetic properties, metamorphic grade, and pattern of structural deformation; they had different vent areas and were deposited in basins that were only partly overlapping. The older sequence includes the Bessemer Quartzite...
Silica mineralogy and structure of the Monterey Shale, Temblor Range, California
K. J. Murata, R.G. Randall
1975, Journal of Research of the U.S. Geological Survey (3) 567-572
The d(101) spacing of diagenetic cristobalite decreases regularly with depth of burial in the siliceous Monterey Shale of the Temblor Range. This relation has been used to delineate the folded structure of the Monterey Shale at a locality near Taft....
The Oligocene volcanic center at Eureka, Nevada
M.C. Blake Jr., E.H. McKee, Richard F. Marvin, Miles L. Silberman, Thomas B. Nolan
1975, Journal of Research of the U.S. Geological Survey (3) 605-612
A volcanic center covering an area of about 80 km2 near Eureka, Nev., and active in the early Oligocene, is characterized by rhyolitic, rhyodacitic. and andesitic pyroclastic rocks, lava flows, and shallow intrusive bodies. These rocks were emplaced as intertonguing and interpenetrative units during a 5-m.y. interval; most of the...
Long-term effects of 4-aminopyridine exposure to birds and fish
E.W. Schafer, L. L. Marking
1975, Journal of Wildlife Management (39) 807-811
The avian frightening agent, 4-aminopyridine (4AP), was tested on five avian and two fish species to assess the effects of long-term 4AP exposure to nontarget vertebrates. Adult bobwhites (Colinus virginianus), mourning doves (Zenaida macroura), and ring-necked pheasants (Phasianus colchicus) were fed diets containing 3 percent 4AP-treated cracked corn diluted with...
Habitat use and home range of mallards breeding in Minnesota
D.S. Gilmer, I.J. Ball, L.M. Cowardin, John Riechmann, J.R. Tester
1975, Journal of Wildlife Management (39) 781-789
Telemetry techniques were used to study habitat use and home range of 12 drake and 12 hen mallards (Anas platyrhynchos) in the forested region of north-central Minnesota during the 1968-72 breeding seasons. Circumneutral bogs and seasonal wetlands were the most frequently used communities; the lakeshore communities most used were sand-gravel,...
Optimal exploitation strategies for an animal population in a Markovian environment: A theory and an example
David R. Anderson
1975, Ecology (56) 1281-1297
Optimal exploitation strategies were studied for an animal population in a Markovian (stochastic, serially correlated) environment. This is a general case and encompasses a number of important special cases as simplifications. Extensive empirical data on the Mallard (Anas platyrhynchos) were used as an example of general theory. The number of...
Disproportionate sex ratios of wolf pups
L.D. Mech
1975, Journal of Wildlife Management (39) 737-740
Males comprised 66 percent of wild wolf (Canis lupus) pups from a saturated, high-density wolf range in northeastern Minnesota, possibly reflecting disproportionate conception of males. Packs from areas of lower wolf density in other areas of Minnesota had equal sex ratios of pups or a disproportionate number of female pups....
New tritium data on movement of groundwater in western Fresno County, California
Joseph Fairfield Poland, Gordon L. Stewart
1975, Water Resources Research (11) 716-724
Well waters along two traverse lines were sampled in 1963 and tested for tritium concentration. Haskell et al. [1966] estimated from the apparent thermonuclear tritium concentrations that groundwater had moved westward in the lower water‐bearing zone at a maximum velocity of 14–16.5 mi (23–27 km) in 9 yr. The maximum velocities...
Whirling disease (Myxosoma cerebralis): Control with ultraviolet irradiation and effect on fish
G. L. Hoffman
1975, Journal of Wildlife Diseases (11) 505-507
Water contaminated by Myxosoma cerebralis was disinfected with ultraviolet irradition to control whirling disease. Irradiation at 18,000 microwatt seconds/cm2 (MWS/cm2) reduced infectivity of M. cerebralis by 31-86% and 27,650 MWS/cm3 reduced infectivity by 86-100%, even in the presence of a small amount of silt....
The scientific referee
Frank T. Manheim
1975, IEEE Transactions on Professional Communication (PC-18) 190-195
In the May 1973 issue of EOS, I criticized tendencies in earth science periodicals to discourage referee anonymity. I stressed that exposing referees to unnecessary personal and subjective influences tended to degrade standards of quality and promoted cliques, fragmentation, superspecialization, and proliferation of scientific literature. Generally speaking, division of opinion...
Maximum stages and discharges of small streams in Indiana
L.G. Davis, R.G. Horner
1975, Open-File Report 75-403
Depredation of sea otter pups by bald eagles at Amchitka Island, Alaska
Steve Sherrod, J. A. Estes, C.M. White
1975, Journal of Mammalogy (56) 701-703
No abstract available. ...
Home range defense in the red fox, Vulpes vulpes L.
E.M. Preston
1975, Journal of Mammalogy (56) 645-652
This paper describes the home range defense behavior observed when nonresident male red foxes were introduced into established home ranges of resident male-female pairs. In 12 observation periods, four intruders were introduced to each of three mated pairs which had been given three weeks to acclimate to a 4.05-hectare, fenced...
Earthquake shaking and damage to buildings
R.A. Page, W. B. Joyner, J.A. Blume
1975, Science (189) 601-608
Ground shaking close to the causative fault of an earthquake is more intense than it was previously believed to be. This raises the possibility that large numbers of buildings and other structures are not sufficiently resistant for the intense levels of shaking that can occur close to the fault. Many...
Status of projects in Minnesota, fiscal years 1975-76
U.S. Geological Survey
1975, Report
No abstract available....
Injection-pipe system for artificial recharge
H.O. Reeder
1975, Journal of Research of the U.S. Geological Survey (3) 501-503
No abstract available....
Effects of sediment control on sediment transport in the northwest branch Anacostia River basin, Montgomery County, Maryland
Thomas H. Yorke
1975, Journal of Research of the U.S. Geological Survey (3) 487-494
Streamflow and sediment were monitored in an urbanizing drainage basin in southeastern Montgomery County, Md., from 1962 to 1972. During this period, urban construction areas averaged about 3 percent of the 21.1 mi2 (54.6 km2) basin. Urban land increased from 3.5 percent in 1959 to 20 percent in 1971. Virtually...
Determination of tungsten in geologic materials by neutron activation analysis
Frederick Otto Simon, Carl L. Rollinson
1975, Journal of Research of the U.S. Geological Survey (3) 475-478
A method is described for the determination of tungsten in geologic materials. After fusion with sodium peroxide, tungsten is isolated by extraction into chloroform with a-benzoinoxime, back extraction into aqueous potassium hydroxide, and precipitation with a-benzoinoxime. The activities of the 0.13 and 0.48 MeV gamma rays are measured. The activity...
Radiochemical determination of very low concentrations of nickel in rocks and minerals
Robert A. Zielinski
1975, Journal of Research of the U.S. Geological Survey (3) 467-473
A radiochemical procedure has been developed for the determination of very low concentrations of nickel in rocks and minerals. Sensitivity is 0.01 μg Ni. Accuracy and precision is estimated to be ±5 percent to levels as low as 0.1 μg Ni a marked improvement over other analytical techniques. Samples...
