Some aspects of the geochemistry of sphalerite, Central City District, Colorado
P.K. Sims, P. B. Barton Jr.
1961, Economic Geology (56) 1211-1237
Detailed studies of sphalerite, as a part of a larger study of the Central City district, Colorado, have been undertaken to learn something of the physico-chemical environment of ore deposition. More than 90 samples have been analyzed by chemical and spectrochemical methods and these data are interpreted in the light...
Palæomagnetic evidence relevant to a change in the Earth's radius
Allan Cox, Richard R. Doell
1961, Nature (190) 36-37
IT is important to note that if, during an expansion of the Earth, each point on the surface were to move radially outward, then all sampling areas would have the same relative geographical co-ordinates before and after expansion. Palæomagnetic results could not be used to detect an expansion of this...
Sulfide ores formed from sulfide-deficient solutions 1
T. S. Lovering
1961, Economic Geology (56) 68-99
Assuming that many hydrothermal ore deposits are formed from emanations given off from a magma at depth while it cools through the interval in which latent heat of crystallization is generated, it is shown that this cooling interval for magmatic bodies of moderate size must be measured in tens or hundreds of...
Sulfide ores formed from sulfide-deficient solutions 1
T. S. Lovering
1961, Economic Geology (56) 68-99
Assuming that many hydrothermal ore deposits are formed from emanations given off from a magma at depth while it cools through the interval in which latent heat of crystallization is generated, it is shown that this cooling interval for magmatic bodies of moderate size must be measured in tens or hundreds of...
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...
Modification of the microhematocrit technique with trout blood
H.N. Larsen, S. F. Snieszko
1961, Transactions of the American Fisheries Society (90) 139-142
Bureau of Sport Fisheries and Wildlife Pesticide-Wildlife Review: 1959
J.B. DeWitt, J.L. George
1960, Circular No. 84 revised
Research findings of the Bureau of Sport Fisheries and Wildlife, State agencies and independent research workers in Ala., Ark., Fla., Ga., La., Mass., Mich., Mont., N. Dak., Tex., and Wis. are summarized in this report together with recommendations for reducing damage from pest control operations. Major topics discussed are:...
Preliminary report on electromagnetic model studies
F.C. Frischknecht, G. B. Mangan
1960, Open-File Report 60-53
More than 70 resopnse curves for various models have been obtained using the slingram and turam electromagnetic methods. Results show that for the slingram method, horizontal co-planar coils are usually more sensitive than vertical, co-axial or vertical, co-planar coils. The shape of the anomaly usually is simpler for the vertical...
Marine geology and bathymetry of nearshore shelf of Chukchi Sea, Ogotoruk Creek area, northwest Alaska
D.W. Scholl, C.L. Sainsbury
1960, Open-File Report 60-123
During July and August 1958 the U.S. Geological Survey conducted a study in behalf of the Atomic Energy Commission of the oceanography, bathymetry, and marine geology of the nearshore shelf of the Chukchi Sea off the Ogotoruk Creek area, northwest Alaska. Ogotoruk Creek enters the Chukchi Sea about 32 miles...
Ground water in Oklahoma
A.R. Leonard
1960, Open-File Report 60-166
One of the first requisites for the intelligent planning of utilization and control of water and for the administration of laws relating to its use is data on the quantity, quality, and mode of occurrence of the available supplies. The collection, evaluation and interpretation, and publication of such data are...
Ground-water supplies in shale and sandstone in Fairfax, Loudoun, and Prince William Counties, Virginia
Paul McKelvey Johnston
1960, Circular 424
The Triassic rocks of northern Virginia may be a potential source of moderately large supplies of ground water for municipal end industrial use if the performance of two deep wells drilled at the site of the new Dulles International Airport is a criterion. These two wells produced 327 and 600...
The Mesaverde group at Sunnyside, Utah
Harold Brodsky
1960, Open-File Report 60-18
The Mesaverde group of Late Cretaceous age at Sunnyside, Utah consists in ascending order; the Blackhawk formation, Castlegate sandstone and the Price River formation. The Mancos shale inter-tongues with the Blackhawk formation.The Mancos shale formed in an offshore marine environment, the Blackhawk formation formed in a mixed marine and continental...
Origin and chemical composition of evaporite deposits
George William Moore
1960, Open-File Report 60-99
A comparative study of marine evaporite deposits forming at the present time along the pacific coast of central Mexico and evaporite formations of Permian age in West Texas Basin was made in order to determine if the modern sediments provide a basis for understanding environmental conditions that existed during deposition...
Geology and ground-water resources of Platte County, Wyoming, with a section on Chemical quality of the water
D. A. Morris, H. M. Babcock, R.H. Langford
1960, Water Supply Paper 1490
Platte County, Wyo., has an area of 2,114 square miles and, in 1950, had a population of 7,925; it lies within parts of two major physiographic provinces, the northern extension of the Southern Rocky Mountains and the northwestern part of the Great Plains. The Laramie Range and related structures lie...
Availability of ground water at the border stations at Laurier and Ferry, Washington
Kenneth Lyle Walters
1960, Circular 422
In the Laurier area, Washington, the Kettle River has cut into crystalline rocks in the deepest part of the valley. Sand and gravel fill were deposited in the valley during Pleistocene time by melt water from glaciers, and subsequent erosion and alluviation formed three terrace levels. The highest level, on...
Occurrence of strontium in natural water
M. W. Skougstad, C. Albert Horr
1960, Circular 420
The regions where the stable strontium content of surface waters is relatively low (less than 0.50 ppm) include the Pacific Northwest, Northeastern United States, and the Central Lowlands, Particularly the Lower Mississippi basin and the Western Gulf Coast area. Moderate concentrations of strontium (0.50 to 1.5 ppm) are found in...
Mode of flow of Saskatchewan Glacier, Alberta, Canada
Mark Frederick Meier
1960, Professional Paper 351
Double-mass curves, with a section fitting curves to cyclic data
James K. Searcy, Clayton H. Hardison, Walter B. Langbein
1960, Water Supply Paper 1541-B
The double.-mass curve is used to check the consistency of many kinds of hydrologic data by comparing data for a single station with that of a pattern composed of the data from several other stations in the area The double-mass curve can be used to adjust inconsistent precipitation data. The...
Time, distance, and drawdown relationships in a pumped ground-water basin
Fred Kunkel
1960, Circular 433
Several reasonable values are assumed for coefficients of transmissibility and storage of lenticular alluvial deposits, These values when substituted in the Theis (1935) nonequilibrium formula as modified by Wenzel (1942) give curves from which time, distance, drawdown relationships are estimated....
Chromite and other mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania, and Delaware
Nancy C. Pearre, Allen V. Heyl Jr.
1960, Bulletin 1082-K
The Piedmont Upland in Maryland, Pennsylvania, and Delaware is about 160 miles long and at the most 50 miles wide. Rocks that underlie the province are the Baltimore gneiss of Precambrian age and quartzite, gneiss, schist, marble, phyllite, and greenstone, which make up the Glenarm series of early Paleozoic (?)...
Progress report on use of water by riparian vegetation, Cottonwood Wash, Arizona
E. L. Hendricks, William Kam, James E. Bowie
1960, Circular 434
Measurements of streamflow, ground-water levels, and meterological data obtained in a 4.1-mile reach of the flood plain of Cottonwood Wash, Mohave County, Ariz., define the use of water by riparian vegetation in that part of the stream valley. The computed evapotranspiration loss during the growing season of 1959 was 175...
Model of study of infiltration into layered materials
W.N. Palmquist Jr., A.I. Johnson
1960, Open-File Report 60-108
Geology and fluorspar deposits, Northgate district, Colorado
Thomas A. Steven
1960, Bulletin 1082-F
The fluorspar deposits in the Northgate district, Jackson County, Colo., are among the largest in Western United States. The mines were operated intermittently during the 1920's and again during World War II, but production during these early periods of operation was not large. Mining was begun on a larger scale...
The Foraminiferal Genus Orbitolina in North America
Raymond Charles Douglass
1960, Professional Paper 333
The foraminiferal genus Orbitolina has been useful as an index fossil in the Cretaceous rocks of the circumglobal equatorial belt for nearly a century. In Europe and the Near and Middle East enough work has been done on the species to allow their use for approximate correlations within the Cretaceous...
Strategic graphite, a survey
Eugene N. Cameron, Paul L. Weis
1960, Bulletin 1082-E
Strategic graphite consists of certain grades of lump and flake graphite for which the United States is largely or entirely dependent on sources abroad. Lump graphite of high purity, necessary in the manufacture of carbon brushes, is imported from Ceylon, where it occurs in vein deposits. Flake graphite, obtained from...
