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Page 6100, results 152476 - 152500

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Graphic and algebraic solutions of the discordant lead-uranium age problem
L. R. Stieff, T. W. Stern
1961, Geochimica et Cosmochimica Acta (22) 176-199
Uranium-bearing minerals that give lead-uranium and lead—lead ages that are essentially in agreement, i.e. concordant, generally are considered to have had a relatively simple geologic history and to have been unaltered since their deposition. The concordant ages obtained on such materials are, therefore, assumed to approach closely the actual age...
Palæomagnetic evidence relevant to a change in the earth's radius
Allan Cox, Richard R. Doell
1961, Nature (189) 45-47
INTEREST in the hypothesis that the Earth's radius has increased during geological history has been renewed in recent years because of several sets of independent observations and interpretations. From studies of the deformation of mountain ranges and the distribution of faults and oceans, Carey1 proposes an increase in the Earth's area...
Palæomagnetism of Hawaiian lava flows
Richard R. Doell, Allan Cox
1961, Nature (192) 645-646
PALÆOMAGNETIC investigations of volcanic rocks extruded in various parts of the world during the past several million years have generally revealed a younger sequence of lava flows magnetized nearly parallel to the field of a theoretical geocentric axial dipole, underlain by a sequence of older flows with exactly the opposite...
Use of radioisotopes in hydrobiology and fish culture
F.F. Hooper, H.A. Podoliak, S. F. Snieszko
1961, Transactions of the American Fisheries Society (90) 49-57
Use of radioisotopes has increased rapidly in hydrobiology and fish culture. Their use, especially P32, to study circulation of nutrients has been demonstrated and offers opportunities in problems of lake metabolism. The most extensive use of isotopes has been to determine photosynthetic activity in plankton through C14 uptake. Applications and limitations...
Aqua de Ney, California, a spring of unique chemical character
J. H. Feth, S. M. Rogers, C. E. Roberson
1961, Geochimica et Cosmochimica Acta (22) 75-86
The chemistry of water of Aqua de Ney, a cold spring of unusual character located in Siskiyou County, Calif., has been re-examined as part of a study of the relation of water chemistry to rock environment. The water has a pH of 11·6 and a silica content of 4000 parts...
Floods in the Skagit River basin, Washington
James E. Stewart, George Lawrence Bodhaine
1961, Water Supply Paper 1527
According to Indian tradition, floods of unusually great magnitude harassed the Skagit River basin about 1815 and 1856. The heights of these floods were not recorded at the time; so they are called historical floods. Since the arrival of white men about 1863, a number of large and damaging floods...
The trout fishery in Shenandoah National Park
Robert E. Lennon
1961, Special Scientific Report - Fisheries 395
Populations of brook trout in streams of Shenandoah National Park were reduced drastically early in the past decade by a succession of unusually severe droughts and floods. The drying of stream beds, predation, and scouring were principal factors in the loss of fish. The park was closed to fishing in...
Hydraulic and hydrologic aspects of flood-plain planning
S.W. Wiitala, K.R. Jetter, Alan J. Sommerville
1961, Water Supply Paper 1526
The valid incentives compelling occupation of the flood plain, up to and eve n into the stream channel, undoubtedly have contributed greatly to the development of the country. But the result has been a heritage of flood disaster, suffering, and enormous costs. Flood destruction awakened a consciousness toward reduction and...
Records and water-level measurements of selected wells and chemical analysis of ground water, East Shore area, Davis, Weber, and Box Elder Counties
Ralph E. Smith
1961, Utah Basic-Data Report 1
This report is intended to serve two purposes: (1) to make available to the public basic ground-water data useful in planning and studying development of water resources and (2) to supplement an interpretive report that will be published later.Records were collected during the period 1935-61 by the U.S. Geological Survey...
Detrital-appearing uraninite grains in the shinarump member of the chinle formation in northern Arizona
R.G. Petersen
1960, Economic Geology (55) 138-149
A sample of uranium-bearing conglomerate from the Shinarump member of the Chinle formation in northern Arizona was disaggregated in an ultrasonic separator. The sample, weighing 187 grams, contained about 60 grains of uraninite (from 0.1 to 1 mm diameter) which have the sphericity and polish suggestive of detrital grains. The detrital-appearing grains are associated with abundant...
Ground-water investigations in Utah in 1960 and ground-water reports published by the U.S. Geological Survey or the Utah State Engineer prior to 1960
Harry D. Goode
1960, Utah State Engineer Information Bulletin 4
Listed below and shown on the map are projects in the ground-water program being conducted cooperatively by the U.S. Geological Survey and the Utah State Engineer. Project UT-5 is conducted from a field office in Cedar City, project UT-17 from a field office in Richfield, project UT-26 from a field...
Ground-water areas and well logs, central Sevier Valley, Utah
Richard A. Young
1960, Utah State Engineer Information Bulletin 3
Between September 1959 and June 1960 the United States Geological Survey and the Utah State Engineer, with financial assistance from Garfield, Millard, Piute, Sanpete, and Sevier Counties and from local water-users’ associations, cooperated in an investigation to determine the structural framework of the central Sevier Valley and to evaluate the...
A statistical analysis of the distribution of a larval nematode (Anisakis sp.) in the musculature of chum salmon (Oncorhynchus keta - Walbaum)
A.J. Novotny
1960, Experimental Parasitology (10) 60-67
The pepsin-HCl digestion technique is probably the best method of isolating Anisakislarvae from the musculature of chum salmon. Some losses can be expected due to breakage of the resistant cuticle of Anisakis, and can be estimated to be about 6% when counting the parasites with the unaided eye. Comparisons of Anisakis infections of the dorsal...
A bacterial disease of yellow perch (Peres flavescens)
A. J. Ross, P.R. Nordstrom, J.E. Bailey, J.H. Heaton
1960, Transactions of the American Fisheries Society (89) 310-312
On May 26, 1959, two of the authors' investigated a fish kill at Dailey Lake, Park County, Montana. They observed about a half-dozen live, weakly swimming yellow perch (Perca flavescens), in addition to thousand of dead perch along the shoreline. It was learned from local residents that mortalities had begun...
Ovarian fluid: Its role in fertilization
R.R. Rucker, J.F. Conrad, C.W. Dick
1960, Progressive Fish-Culturist (22) 77-78
FISH-CULTURISTs, in general, do not agree as to the time of actual fertilization of artificially spawned salmonid eggs. Some fish-culturists believe that the eggs are fertilized in the milt before water is added, while others are equally certain that fertilization is not achieved until after water is added. This difference...