Mercury's surface: Preliminary description and interpretation from Mariner 10 pictures
B. C. Murray, M. J. S. Belton, G. Edward Danielson, M. E. Davies, D. E. Gault, B. Hapke, B. O'Leary, R.G. Strom, V. Suomi, N. Trask
1974, Science (185) 169-179
The surface morphology and optical properties of Mercury resemble those of the moon in remarkable detail and record a very similar sequence of events. Chemical and mineralogical similarity of the outer layers of Mercury and the moon is implied; Mercury is probably a differentiated planet with a large iron-rich core....
Composition and time relations of plutonic and associated volcanic rocks, Boulder Batholith Region, Montana
Robert I. Tilling
1974, GSA Bulletin (85) 1925-1930
Comparison of areally weighted bulk compositions for the Boulder batholith and prebatholith volcanic rocks (Elkhorn Mountains Volcanics) shows a close match in terms of K2O-Na2O-CaO-SiO2 variations. Detailed examination of available chemical data suggests, however, that the constituent units of the volcanic rocks differ among themselves, as well as from many of...
A deep research drill hole at the summit of an active volcano, Kilauea, Hawaii
Charles J. Zablocki, Robert I. Tilling, D. W. Peterson, Robert L. Christiansen, George V. Keller, John C. Murray
1974, Geophysical Research Letters (1) 323-326
Drilling and geophysical logging data for a 1,262 m‐deep bore hole in the area inferred to overlie the magma reservoir of Kilauea Volcano, Hawaii, support earlier interpretations based on surface geophysical surveys that a zone of brackish or saline water lies above the reservoir. Temperatures encountered within the hole are...
Foods of breeding pintails in North Dakota
Gary L. Krapu
1974, Journal of Wildlife Management (38) 408-417
Food habits of breeding pintails (Anas acuta) were studied relative to sex, land use, and reproductive condition during the spring and summer of 1969, 1970, and 1971 in eastern North Dakota. Hens and drakes, respectively, consumed 79.2 percent and 30.0 percent animal matter on nontilled wetlands and consumed 16.6 percent...
Palynology and stratigraphy of Cretaceous strata in Long Island, New York, and Block Island, Rhode Island
Leslie A. Sirkin
1974, Journal of Research of the U.S. Geological Survey (2) 431-440
Palynologic analysis of core samples from Fire Island well, S21,091T, in southern Long Island and of surface samples from Garvies Point in northern Long Island and from eastern Block Island indicates that the Cretaceous of this region includes Raritan, Magothy, Matawan, and Monmouth (as previously defined) strata, and ranges in...
Shallow seismic compressional and shear wave refraction and electrical resistivity investigations at Rocky Flats, Jefferson County, Colorado
Hans D. Ackermann
1974, Journal of Research of the U.S. Geological Survey (2) 421-430
Seismic refraction and electrical resistivity investigations at Rocky Flats, Colo., a gravel-capped pediment, indicated an irregular bedrock surface which ranges in depth from 3 to 27 m (10-90 ft). Layers within the gravel that were revealed by interpretation of seismic and electrical data do not correlate, but the combining of...
Folds and overthrusts of late Jurassic or early Cretaceous age in northern Nevada
Keith B. Ketner, J. Fred Smith Jr.
1974, Journal of Research of the U.S. Geological Survey (2) 417-419
The partly isoclinal, partly overturned Adobe syncline extends for at least 75 mi northeastward across the northern Cortez Mountains, the northern Pinon Range, and along the entire length of the Adobe Range. The folded rocks range in age from Ordovician through Jurassic and may include some rocks of Cretaceous age....
Stratigraphic evidence on the age of the Roberts Mountains thrust, Eureka and White Pine Counties, Nevada
T. B. Nolan
1974, Journal of Research of the U.S. Geological Survey (2) 416
Several stratigraphic discontinuities in Devonian and Mississippian sedimentary sequences in folded thrust plates east of the Roberts Mountains thrust of central Nevada indicate that the thrust was sporadically active during this interval. From estimates for displacement and time involved for the thrust, the average rate of movement was 1 cm/5...
Relation of mineralization to calderas in the San Juan volcanic field, southwestern Colorado
Thomas A. Steven, Robert G. Luedke, Peter W. Lipman
1974, Journal of Research of the U.S. Geological Survey (2) 405-409
A review of the calderas in the San Juan volcanic field, southwestern Colorado, indicates that lead, zinc, copper, gold, and silver mineralization took place in and near calderas which had complex histories of postsubsidence intrusive and extrusive igneous activity. Most known ore occurs in veins that follow fractures formed during...
Some interpretations of sequential bid pricing strategies
Emil D. Attanasi
1974, Management Science (20) 1413-1496
This note provides an alternative interpretation for sequential bid pricing strategies as initially formulated by Kortanek, Soden, and Sodaro [Kortanek, K. O., J. V. Soden, D. Sodabo. 1973. Profit analysis and sequential bid pricing models. Management Sci.20 (3, November) 396–417. In particular, bid prices obtained from the sequential model are shown to...
Yachats Basalt: An upper Eocene differentiated volcanic sequence in the Oregon Coast Range
Parke D. Snavely Jr., Norman S. MacLeod
1974, Journal of Research of the U.S. Geological Survey (2) 395-403
The name Yadials Basalt is proposed for a sequence of largely subacrial basalt flows and breccias and associated dikes of late Eocene age that arc exposed along the central Oregon coast. These volcanic rocks, which have a maximum thickness of 750 m, are underlain by marine siltstonc of late Eocene...
The cartographic and scientific application of ERTS-1 imagery in polar regions
Rupert B. Southard, William R. MacDonald
1974, Journal of Research of the U.S. Geological Survey (2) 385-394
The first Earth Resources Technology Satellite (ERTS-1), launched by the National Aeronautics and Space Administration in. July 1972, is providing valuable data for investigations of the most inaccessible and hostile regions of the Earth the Arctic and Antarctic. ERTS images and map products derived from them offer a whole new...
Structure of the continental margin of Liberia, West Africa
John C. Behrendt, John Schlee, James M. Robb, M. Katherine Silverstein
1974, GSA Bulletin (85) 1143-1158
Geophysical surveys made by R/V Unitedgeo I (USGS–IDOE Cruise Leg 5), combined with earlier surveys and available geologic information, provide the basis for interpreting the structure of the continental margin of Liberia. This area lies at the junction of the Americas and Africa in published reconstructions of Gondwanaland prior to the opening...
Investigation of diffusion in open-channel flows
Thomas N. Keefer, Raul S. McQuivey
1974, Journal of Research of the U.S. Geological Survey (2) 501-509
This investigation examines the interrelation between turbulent diffusion, dispersion, and the statistical properties of turbulence in an open-channel flow. The results of the study substantiate Philip's concept relating the ratio of Eulerian to estimated Lagrangian time scales and the reciprocal of the longitudinal intensity of turbulence. The relation may be...
Generalization of stream travel rates and dispersion characteristics from time-of-travel measurements
Charles W. Boning
1974, Journal of Research of the U.S. Geological Survey (2) 495-499
Prediction of travel rates of water in streams is important for pollution control and for warning systems where contaminant spillage is possible. A method of estimating traveltime and dispersion of solutes in streams where such data are not available is provided in this report. Generalized relations for travel rates...
Carbon, hydrogen, oxygen, and sulfur isotope study of the Darwin lead-silver-zinc deposit, Southern California
Robert O. Rye, Wayne E. Hall, H. Ohmoto
1974, Economic Geology (69) 468-481
The ores at Darwin occur as massive replacement bodies in silicated limestones of Pennsylvanian and Permian age adjacent to a Jurassic quartz monzonite stock. Three types of ore have a definite spatial relationship to the quartz monzonite: (1) pyrite-sphalerite-galena ores, (2) pyrite-pyrrhotite-magnetite-sphalerite-galena ores, and (3) galena-Ag-Bi-Se ores.The delta 34 S values of...
A sensitive and rapid method for the determination of trace amounts of selenium in geologic materials
George L. Crenshaw, Hubert William Lakin
1974, Journal of Research of the U.S. Geological Survey (2) 483-487
A sensitive method for the determination of less than crustal abundance amounts of selenium has been developed that can be useful in the geochemical investigation of selenium. The sample is roasted with a flux of sodium carbonate, chloride, and chlorate and then digested in a mixture of nitric and phosphoric...
Mineralogical studies of the nitrate deposits of Chile IV. Brüggenite, Ca(IO3)2-H2O, a new saline mineral
George E. Ericksen, Mary E. Mrose, John Marinenko
1974, Journal of Research of the U.S. Geological Survey (2) 471-478
Brüggenite, Ca(I0 3 )2 - H2 0, is found in veins of high-purity soda niter in rhyolite tuff at Pampa Pique III, Oficina Lautaro, Chile, as long columnar anhedral crystals, as prismatic crystals, and as irregular anhedral crystals or encrusting masses. The mineral is colorless to bright yellow, and transparent...
Birnessite (delta MnO2-3H2O) in a large spherulite in obsidian near Silver Cliff, Colorado
Fred A. Hildebrand
1974, Journal of Research of the U.S. Geological Survey (2) 467-469
Birnessite and cryptomelane were identified in the montmorillonitic border zone of a large spherulite in obsidian north of Silver Cliff, Colo. The manganese minerals contain no silver and probably formed more recently than argentian cryptomelane which is abundant in the manganiferous silver ores of the surrounding volcanic rocks....
Equilibria of cinnabar, stibnite, and saturated solutions in the system HgS-Sb2S3-Na2S-H2O from 150° to 250°C at 100 bars, with implications concerning ore genesis
R. E. Learned, G. Tunell, F. W. Dickson
1974, Journal of Research of the U.S. Geological Survey (2) 457-466
The common occurrence of cinnabar and stibnite in well-defined districts in the same epithermal environments suggests that similar physiochemical processes are responsible for the genesis of the two minerals; however, cinnabar and stibnite tend to be segregated within these districts and also within individual deposits that contain both minerals. Where...
Activity-product constants of aragonite at 90° and 51°C
R. M. Siebert, P. B. Hostetler, C. L. Christ
1974, Journal of Research of the U.S. Geological Survey (2) 447-455
The activity-product constants of aragonite, KA=[Ca2+][CO32-] (where the brackets denote activities), were determined experimentally at 90°C and at 51°C. Results at 90°C were obtained from four separate dolomite dissolution runs, in which aragonite precipitated and came to equilibrium with the aqueous phase (from the direction of. supersaturation), and from two...
Energy dispersive spectrometry for quantitative mineralogical analyses: An ancillary system on an electron microphobe
George A. Desborough, Robert H. Heidel
1974, Journal of Research of the U.S. Geological Survey (2) 441-446
Investigation of the Li-drifted Si-semiconductor X-ray detector for quantitative elemental analysis of some common rock-forming minerals shows that amounts of certain major elements having K spectra in the energy range of about 1.74 (Si) to 8.64 (Zn) kiloelectronvolts may be accurately determined, if spectral interferences are absent. Elements in major...
Seasonal variation of the upper digestive tract yeast flora of feral pigeons
R. M. Kocan, H.F. Hasenclever
1974, Journal of Wildlife Diseases (10) 263-266
Feral pigeons were sampled over a 16-month period to determine whether their normal yeast flora varied according to season. Candida albicans and Saccharomyces telluris occurred during the entire sampling period, with C. albicans reaching its highest levels between August and January and S. telluris peaking from March through May. Candida krusei was present for 10 months but exhibited no predictable...
Effects of TFM and Bayer 73 on in vivo oxygen consumption of the aquatic midge Chironomus tentans
J.A. Kawatski, V. K. Dawson, M.L. Reuvers
1974, Transactions of the American Fisheries Society (103) 551-556
Exposure of fourth instar larvae of Chironomus tentans to 2.0‐8.0 mg/liter of TFM (3‐trifluormethyl‐4‐nitrophenol) for 6 hr at 22 ± 0.5 C in soft water resulted in a significantly increased rate of larval oxygen consumption compared to that of control larvae, as measured with the Warburg respirometer. Maximum stimulation...
Disinfection of contaminated water by ultraviolet irradiation, with emphasis on whirling disease (Myxosoma cerebralis) and its effect on fish
G. L. Hoffman
1974, Transactions of the American Fisheries Society (103) 541-550
Rainbow trout fry developed whirling disease upon exposure to water contaminated with Myxosoma cerebralis. When similarly contaminated water was irradiated with 2537 Angstrom units of ultraviolet light at dosages of 35,000, 43,000, and 112,000 microwatt sec/cm2, infection of fry was prevented. The minimum effective dosage was not determined in the...
