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Page 5734, results 143326 - 143350

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Publication Extents

Not all publications have extents, not all extents are completely accurate
A progress report: Water conservation by removal of phreatophytes
Richard C. Culler
1970, Eos, Transactions, American Geophysical Union (51) 684-689
Evapotranspiration from the flood plain of a major river depletes the water contributed from upstream areas of the watershed. This depletion can be significant in arid regions where water supplies are inadequate. Phreatophyte control offers a method of reducing the evapotranspiration and thus increases the water available...
Nature and origin of early and late cherts in the Leadville Limestone, Colorado
Norman G. Banks
1970, Bulletin of the Geological Society of America (81) 3033-3048
Two generations of chert have been observed in the Mississippian Leadville Limestone of west-central Colorado: (1) an early chert inferred to have precipitated from hypersaline marine waters of high pH after those waters seeped into carbonate muds prior to final burial and lithification of the carbonate; and (2) a late...
Control methods for snail-borne zoonoses
G. L. Hoffman
1970, Journal of Wildlife Diseases (6) 262-265
All trematodes which cause infections and diseases in humans (zoonoses) require snails for their first intermediate host. Some have additional intermediate hosts such as crustaceans, fishes and frogs.In this paper I have discussed the use of various procedures for controlling snail populations thereby reducing the population of trematodes whose cercariae...
Eastern margin of the Red Sea and the coastal structures in Saudi Arabia
Glen F. Brown
1970, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (267) 75-87
Results of many investigations since 1950 show that the eastern margin of the Red Sea and associated coastal structures in Saudi Arabia have a long geologic history, starting with the deposition of Precambrian eugeosynclinal sedimentary and volcanic rocks before 1000 Ma ago and extending to recent geologic time. The northeastern...
Seismic refraction study of crustal structure in the western United States
Claus Prodehl
1970, Bulletin of the Geological Society of America (81) 2629-2645
A network of 64 seismic-refraction profiles recorded by the U.S. Geological Survey in California and Nevada and adjacent areas of Idaho, Wyoming, Utah, and Arizona from 1961 to 1963 was re-interpreted. From record sections compiled for all profiles, a basic travel-time diagram can be derived. In addition to the first...
The Uralides and the motion of the Russian and Siberian Platforms
Warren B. Hamilton
1970, Bulletin of the Geological Society of America (81) 2553-2576
The Uralides—the late Precambrian and Paleozoic orogenic terrane between the Russian and Siberian Platforms—in part are exposed in the Ural Mountains, in the central Soviet Arctic, along the west edge of the Siberian Platform, and in southern Siberia and Kazakhstan, and in part are buried beneath the fill of the...
Radiometric ages and stratigraphic sequence of volcanic and plutonic rocks, southern Nye and western Lincoln Counties, Nevada
Richard F. Marvin, F.M. Byers Jr., Harald H. Mehnert, Paul P. Orkild, T. W. Stern
1970, Bulletin of the Geological Society of America (81) 2657-2676
The geochronology of Tertiary igneous events at the Nevada Test Site and adjacent area is outlined by 36 recently determined K-Ar ages, together with other published K-Ar ages. The first evidence of Tertiary igneous activity is the ash-fall bedded tuffs in the Horse Spring Formation. One such tuff has been...
A re-evaluation of basalt-obsidian relations at East Lake Fissure, Newberry Caldera, Oregon
Michael W. Higgins, Aaron C. Waters
1970, Bulletin of the Geological Society of America (81) 2835-2842
Andesite scoria, agglutinate, and small flows formed by thin lava gushes that erupted from East Lake Fissure on the north wall of Newberry Caldera carry numerous inclusions of platy rhyolite, partly melted platy rhyolite, and frothy obsidian. This association of obsidian and “basalt” has been...
A look at the Hudson River estuary
Mark W. Buaby, Kenneth I. Darmer
1970, Journal of the American Water Resources Association (JAWRA) (6) 802-812
This paper provides background information on the effect of tide waves upon the movement of water in the Hudson River estuary. Computations based on records from three continuous stage recorders and current-meter discharge measurements made throughout a tidal cycle show that peak discharge rates in the...
DDE thins eggshells of captive American kestrels
Stanley N. Wiemeyer, Richard D. Porter
1970, Nature (227) 737-738
EGGSHELL thinning in several species of raptorial and fish-eating birds, whose populations and/or reproductive success have declined dramatically in recent years, has been correlated with residues of DDE [1,1-dichloro-2,2-bis (p-chlorophenyl) ethylene] in their eggs1–3. DDE, a common metabolite of DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane] and a nearly universal contaminant in the food of...
Geochronology of Tertiary igneous rocks in central Nevada
Edwin H. McKee, Miles L. Silberman
1970, Bulletin of the Geological Society of America (81) 2317-2327
Potassium-argon dating of Tertiary igneous rocks in Lander County, central Nevada, indicates that igneous activity was episodic and can be separated into three periods. Igneous activity started abruptly about 37 m.y. ago with local extrusion of andesitic to quartz-latitic lava flows and intrusion of hypabyssal rocks of similar composition. This...
Propagation of captive American kestrels
Richard D. Porter, Stanley N. Wiemeyer
1970, Journal of Wildlife Management (34) 594-604
A colony of kestrels (Palco sparverius) was established at the Patuxent Wildlife Research Center in 1964 in connection with work on pesticides. The kestrels were acquired from the wild, both as nestlings and as full-grown birds, and were housed in several rows of outdoor pens. Each 50 x 20 ft...
4 Earthquake: Major offshore earthquakes recall the Aztec myth
United States Department of Commerce
1970, Earthquake Information Bulletin (USGS) (2) 4-7
Long before the sun clears the eastern mountains of April 29, 1970, the savanna highlands of Chiapas tremble from a magnitude 6.7 earthquake centered off the Pacific coast near Mexico’s southern border. Then, for a few hours, he Isthmus of Tehuantepec is quiet....
Boulder Creek batholith, Colorado part I: Allanite and its bearing upon age patterns
Nelson L. Hickling, George Phair, Roosevelt Moore, Harry J. Rose Jr.
1970, Bulletin of the Geological Society of America (81) 1973-1993
Allanite is abundant and commonly attains unusually large size as a late-replacement mineral in: (1) the comagnatic rocks of the Precambrian Boulder Creek batholith; (2) associated amphibolite xenoliths and related hybrid rocks; and (3) distinctly younger intrusions of Silver Plume Granite that cut the complex. Allanite porphyroblasts develop by replacement...
Saline ground-water resources of the Tularosa Basin, New Mexico
J. S. McLean
1970, Research and Development Progress Report 561
This report describes the location, extent, and quality of saline ground water in the Tularosa Basin, a north-trending elongated, intermontane, desert basin in  south-central New Mexico. There are no through-flowing streams; runoff from the bordering mountains flows to ephemeral lakes in the center of the basin. Fresh-water supplies in the Tularosa...
An outbreak of fowl cholera in waterfowl on the Chesapeake Bay
L. N. Locke, V. Stotts, G. Wolfhard
1970, Journal of Wildlife Diseases (6) 404-407
An outbreak of fowl cholera (Pasteurella multocida infection) occurred in waterfowl wintering on the Chesapeake Bay during February to March 1970. Losses were primarily confined to sea ducks: oldsquaws (Clangula hyemalis), white-winged scoters (Melanitta deglandi), golden-eyes (Bucephala clangula), and buffleheads (Bucephala albeola)....
Identification of polychlorinated biphenyls in two bald eagles by combined gas-liquid chromatography-mass spectrometry
George E. Bagley, W. L. Reichel, E. Cromartie
1970, Journal of the Association of Official Analytical Chemists (53) 251-261
Polychlorinated biphenyls are widely used industrial compounds marketed in the United States under the trade name Aroclor. They have appeared in fish and wildlife tissues in this country and Europe. They are known to be toxic, but more importantly, their presence in samples along with the commonly occurring organochlorine pesticides...