Geothermal resources of the northern gulf of Mexico basin
P.H. Jones
1970, Geothermics (2) 14-26
Published geothermal gradient maps for the northern Gulf of Mexico basin indicate little or no potential for the development of geothermal resources. Results of deep drilling, from 4000 to 7000 meters or more, during the past decade however, define very sharp increases in geothermal gradient which are associated with the...
Use of LiBO2 flux for K-Ar dating
J. C. Engels, C.O. Inamells
1970, Talanta (17) 783-784
[No abstract available]...
Radiochemical separation of gold by amalgam exchange
R.R. Ruch
1970, Analytica Chimica Acta (49) 381-389
A rapid and simple method for the radiochemical separation of gold after neutron activation. The technique is based on treatment with a dilute indium-gold amalgam, both chemical reduction and isotopic exchange being involved. The counting efficiency for 198Au in small volumes of the amalgam is good....
Magnetic studies of lunar samples
Richard Rayman Doell, S.C. Gromme, A.N. Thorpe, Frank E. Senftle
1970, Science (167) 695-697
The remanent magnetism of a lunar type C breccia sample includes a large viscous component with a time constant of several hours, and a high coercivity remanence, possibly acquired by impact processes on the lunar surface. Ilmenite(?) and metallic iron in breccias, and ferrous and metallic iron in glass beads...
Lithium metaborate flux in silicate analysis
C.O. Ingamells
1970, Analytica Chimica Acta (52) 323-334
Lithium metaborate is an effective flux for silicates and other rock-forming minerals. The glass resulting from fusion is mechanically strong, reasonably nonhygroscopic, and is readily soluble in dilute acids. These characteristics lead to its use in X-ray spectrography and in methods which require whole-rock solutions,...
Age of the moon: An isotopic study of uranium-thorium-lead systematics of lunar samples
M. Tatsumoto, J.N. Rosholt
1970, Science (167) 461-463
Concentrations of U, Th, and Pb in Apollo 11 samples studied are low (U. 0.16 to 0.87; Th, 0.53 to 3.4; Pb, 0.29 to 1.7, in ppm) but the extremely radiogenic lead in samples allows radiometric dating. The fine dust and the breccia have a concordant age of 4.66 billion...
Sulfur isotope distribution in solfatares, Yellowstone National Park
R. Schoen, R. O. Rye
1970, Science (170) 1082-1084
Sulfur isotope data on hydrogen sulfide, native sulfur, and sulfates from acid hot-spring areas at Yellowstone National Park suggest that hydrogen sulfide oxidizes to sulfur analogically, whereas sulfur undergoes biological oxidation to sulfuric acid. An exception occurs at Mammoth Hot Springs where hydrogen sulfide apparently undergoes biochemical oxidation to sulfur....
A possible bedrock source for obsidian found in archeological sites in northwestern Alaska
W. W. Patton Jr., T. P. Miller
1970, Science (169) 760-761
Recently discovered deposits of obsidian in the Koyukuk valley may be the long-sought-for source of obsidian found in archeological sites in northwestern Alaska. Obsidian from these deposits compares favorably in physical characteristics and sodium-manganese ratio with the archeological obsidian, and there is evidence that the deposits have been "mined" in...
Phase relations of a simulated lunar basalt as a function of oxygen fugacity, and their bearing on the petrogenesis of the Apollo 11 basalts
R.L. Tuthill, M. Sato
1970, Geochimica et Cosmochimica Acta (34) 1293-1302
A glass of Apollo 11 basalt composition crystallizing at 1 atm at low ƒ02">ƒƒ02 showed the following crystallization sequence; ferropseudobrookite at 1210°C, olivine at 1200°C, ilmenite and plagioclase at 1140°C, clinopyroxene at 1113°C. Ferropseudobrookite and olivine have a reaction relation to the melt. This sequence agrees...
Analytical sensitivities and energies of thermal-neutron-capture gamma rays
D. Duffey, A. El-Kady, Frank E. Senftle
1970, Nuclear Instruments and Methods (80) 149-171
A table of the analytical sensitivities of the principal lines in the thermal-neutron-capture gamma ray spectrum has been compiled for most of the elements. In addition a second table of the full-energy, single-escape, and double-escape peaks has been compiled according to energy for...
Waterfowl in relation to land use and water levels on the Spring Run Area
Gary Krapu, D.R. Parsons, M.W. Weller
1970, Iowa State Journal of Science (44) 437-452
Low water levels during critical phases of the breeding cycle appear to have caused population declines of waterfowl and other marsh birds on the Spring Run Game Management Area. Pair-counts indicated a decline from 70 pairs of waterfowl in 1965 to 2 pairs in 1968. Nest success of upland nesting...
Metamorphosis of the landlocked sea lamprey, Petromyzon marinus
Patrick J. Manion, Thomas M. Stauffer
1970, Journal of the Fisheries Research Board of Canada (27) 1735-1746
The external metamorphosis of the sea lamprey was divided into four stages, based primarily on the condition of the mouth: mouth reduced, mouth fused, mouth enclosed, and mouth elongated. During metamorphosis, the eye enlarged greatly, the snout and mouth region changed from a fleshy hood enclosing a sieve apparatus to...
Excavations at Baker Cave, Val Verde County, Texas
J.H. Word, C. L. Douglas
1970, Texas Memorial Museum Bulletin (16) 1-151
No abstract available at this time...
Alula removal technique for identifying wings of released waterfowl
George V. Burger, Raymond J. Greenwood, Richard C. Oldenburg
1970, Journal of Wildlife Management (34) 137-140
A technique for marking waterfowl ducklings less than 1 day old was developed to permit subsequent identification in the hand. Marking was accomplished by removing the alulae from wings of mallard (Anas platyrhynchos) ducklings with a small scissors or clipper. No differences in growth rate, behavior, or flight capability were...
An annotated list of the fishes of Lake Erie and its tributary waters exclusive of the Detroit River
Harry D. Van Meter, Milton B. Trautman
1970, Ohio Journal of Science (70) 65-78
Dramatic fluctuations have occurred in the abundance of many species in Lake Erie and its tributary waters in the last century. Some fishes of former economic importance have become commercially extinct. Several species apparently have been extirpated, especially in the tributaries. It is believed that further changes in the abundance...
Apollo 11: Exposure of lower animals to lunar material
C.A. Benschoter, T.C. Allison, J.F. Boyd, M.A. Brooks, J.W. Campbell, R.O. Groves, A.M. Heimpel, H.E. Mills, S.M. Ray, J.W. Warren
1970, Science (169) 470-472
Nutritional (dietary) gill disease and other less known gill diseases of freshwater fishes
Stanislas F. Snieszko
1970, Fish Disease Leaflet 23
No abstract available at this time...
Determination of fluoride in silicate rocks without separation of aluminum using a specific ion electrode
B.L. Ingram
1970, Analytical Chemistry (42) 1825-1827
No abstract available....
Latitudinal gradients in tertiary molluscan faunas of the Pacific coast
Warren O. Addicott
1970, Palaeogeography, Palaeoclimatology, Palaeoecology (8) 287-312
Tertiary molluscan faunas of the middle latitudes of the marginal eastern North Pacific are characterized by warm-water taxa whose descendants now live in more southerly latitudes. A series of profiles in which cumulative percentages of warm-water faunal elements are plotted against latitude show progressive northward decreases in the percentage of...
Salmonid viruses: Double infection of RTG-2 cells with Egtved and infectious pancreatic necrosis viruses
Ken Wolf, P. E. Vestergard Jorgensen
1970, Archiv Fur Die Gesamte Virusforschung (29) 337-342
Egtved and infectious pancreatic necrosis (IPN) viruses were applied at high multiplicity alone and in combination to RTG-2 cells in liquid medium. Procedures were used which selectively suppressed one or the other virus, and the yields were determined after 64 hours at 15°C. The viruses showed an increase of 280...
Lunar clinopyroxenes: Chemical composition, structural state, and texture
M. Ross, A.E. Bence, E.J. Dwornik, J. Robert Clark, James J. Papike
1970, Science (167) 628-630
Single-crystal x-ray diffraction, microprobe, optical and electron optical examinations of clinopyroxenes from Apollo 11 lunar samples 10003, 10047, 10050, and 10084 show that...
Thermal features at Volcanoes in the cascade range, as observed by aerial infrared surveys
R.M. Moxham
1970, Bulletin Volcanologique (34) 77-106
There have been no substantial changes in the thermal patterns at the summit of Mount Rainier in the period September 1964–September 1966, within the detection limits of the infrared instrumentation. Some differences in radiance are attributed to differences in snow cover. The highest apparent temperature is at a snow-free area...
Effects of oil development in Arctic America
J. Michael Reed
1970, Biological Conservation (2) 273-277
Large and important discoveries of petroleum were made in northern Alaska in 1968. The reserves were estimated then to be perhaps as much as ten thousand million barrels. Subsequent exploration has shown the resources to be much greater than was estimated earlier. Many...
Aeromagnetic map of the Camden-Kershaw area, north-central South Carolina
Water Resources Division U.S. Geological Survey
1970, Open-File Report 70-334
No abstract available....
An improved method for size distribution of stream bed gravel
Luna Bergere Leopold
1970, Water Resources Research (6) 1357-1366
Random sampling of surface rocks on a gravel bar is biased toward larger sizes which, because of their area, are more likely to be picked up. Weighting can eliminate this bias. Data on average weight of a single rock are used to change numbers of rocks to weights, thus yielding...
