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Page 6491, results 162251 - 162275

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Fish furunculosis
S. F. Snieszko
1969, Fish Disease Leaflet 17
No abstract available at this time...
Etching fission tracks in zircons
C. W. Naeser
1969, Science (165) 388-388
A new technique has been developed whereby fission tracks can be etched in zircon with a solution of sodiuim hydroxide at 220°C. Etching...
Cliftonite: A proposed origin, and its bearing on the origin of diamonds in meteorites
R. Brett, G.T. Higgins
1969, Geochimica et Cosmochimica Acta (33)
Cliftonite, a polycrystalline aggregate of graphite with spherulitic structure and cubic morphology, is known in 14 meteorites. Some workers have considered it to be a pseudomorph after diamond, and have used the proposed diamond ancestry as evidence of a meteoritic parent body of at least lunar dimensions. Careful examination of...
Geochemical maps of an area northwest of the Chulitna River, central Alaska Range
C. C. Hawley, Allen L. Clark
1969, Open-File Report 69-123
An area northwest of the Chulitna River in west-central Alaska Range locally shows local anomalous concentrations of gold, silver, arsenic, copper, zinc, and lead in stream-sediment samples. Most stream sediments showing anomalous concentrations of metals can be correlated with either known or newly discovered deposits or occurrences described in Circular...
Environmental impact of the Big Cypress Swamp jetport
U.S. Department of the Interior
1969, Report
Development of the proposed jetport and its attendant facilities will lead to land drainage and development for agriculture, industry, housing, transportation, and services in the Big Cypress Swamp which will inexorably destroy the south Florida ecosystem and this the Everglades National Park....
Geologic history of the Colorado River: Chapter C in The Colorado River region and John Wesley Powell (Professional Paper 669)
Charles B. Hunt
1969, Professional Paper 669-C
John Wesley Powell clearly recognized that the spectacular features of the Colorado River - its many grand canyons - were dependent upon the structural history of the mountainous barriers crossed by the river. He conceived of three different historical relationships between rivers and structural features: (1) Newly uplifted land surfaces...
Some triple-filament lead isotope ratio measurements and an absolute growth curve for single-stage leads
J. S. Stacey, M.E. Delevaux, T.J. Ulrych
1969, Earth and Planetary Science Letters (6) 15-25
Triple-filament analyses of three standard lead samples are used to calibrate a mass spectrometer in an absolute sense. The bias we measure is 0.0155 percent per mass unit, and the precision (for 95% confidence limits) is ±0.13% or less for all ratios relative to204Pb. Although its precision is not quite...
40Ar/36Ar analyses of historic lava flows
G. B. Dalrymple
1969, Earth and Planetary Science Letters (6) 47-55
The ratio40Ar/36Ar was measured for 26 subaerial historic lava flows. Approximately one-third of the samples had40Ar/36Ar ratios either higher or lower than the atmospheric value of 295.5 at the 95% confidence level. Excess radiogenic40Ar in five flows ranged from about 1 ×...
Devonian laterite in Chitral state, West Pakistan
Karl W. Stauffer
1969, Economic Geology (64) 452-454
A Devonian laterite has recently been discovered near Reshun in the Mastuj valley of Chitral State, West Pakistan. It is believed to be the fourth recorded Paleozoic laterite in the world. The laterite is entirely within a thick carbonate of the Shogram Formation of Upper Devonian (Frasnian) age. A chemical...
Compilation of hydrologic data, Green Creek, Brazos River basin, Texas, 1966
Trigg Twichell
1969, Report
In 1950 the U. S. Soil Conservation Service began construction of floodwater-retarding structures in Texas under authorities granted by the Congress. These authorities provide, where economically feasible, that the program be applied to tributary watersheds of 240,000 acres or less. The usual practice has been to control flood runoff from...
Compilation of hydrologic data, Honey Creek, Trinity River Basin, Texas, 1967
Trigg Twichell
1969, Report
The U.S. Soil Conservation Service is actively engaged in the installation of flood and soil erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found...
The circle creek rhyolite, a volcanic complex in northern Elko county, Nevada
Robert R. Coats
1968, Book chapter, Studies in Volcanology
The Circle Creek Rhyolite is a multiple-source mass of fayalite-ferro-augite rhyolite, forming an extensive complex in northern Elko County, Nevada, with a diameter of about 8 miles and an exposed area of about 36 square miles. From the structure of the flow layering and the complex sequence of microbrecciation structures,...