Back-extraction of trace elements from organometallic-halide extracts for determination by flameless atomic absorption spectrometry
J. Robert Clark, John G. Viets
1981, Analytical Chemistry (53) 65-70
The Methyl isobutyl ketone-Amine synerGistic Iodkte Complex (MAGIC) extraction system offers the advantage that a large number of trace elements can be rapidly determined with a single sample preparation procedure. However, many of the elements extracted by the MAGIC system form volatile organometallic halide salts when the organic extract is...
Woolly erionite from the Reese River zeolite deposit, Lander County, Nevada, and its relationship to other erionites
Arthur J. Gude III, Richard A. Sheppard
1981, Clays and Clay Minerals (29) 378-384
Woolly erionite from the Reese River deposit, Nevada, is identical in appearance to that at the type locality, near Durkee, Oregon. Both of these erionites differ in appearance from all other erionite reported in the past 20 years from diverse rocks throughout the world which are described as prismatic or...
Pb210 geochronology and trace metal concentrations of sediments from Upper Klamath Lake and Lake Euwana, Oregon.
E.A. Martin, C. A. Rice
1981, Northwest Science (55) 269-280
Rates of sedimentation calculated from analyses of 210Pb activities in cores from two shallow lakes whose mean depths are 2.4m, Upper Klamath Lake and Lake Euwana (Klamath County, Oregon), indicate that they are filling at approximately 3.0mm/yr. Average sedimentation rates for compaction-corrected cores range from 0.9mm/yr to 8.5mm/yr or from...
The P-wave velocity of the uppermost mantle of the Rio Grande rift region of north central New Mexico
J.N. Murdock, L.H. Jaksha
1981, Journal of Geophysical Research Solid Earth (86) 7055-7063
A network of seismograph stations has operated in north-central New Mexico since 1975. The network is approximately 200 by 300 km in size and encompasses the Rio Grande rift there. Several seismic refraction experiments have been reported in the literature for the region of the network and adjacent areas. Because...
The late-Neoglacial histories of the Agassiz and Jackson glaciers, Glacier National Park, Montana.
P. E. Carrara, R. G. McGimsey
1981, Arctic and Alpine Research (13) 183-196
Twenty-one tree-ring stations, totaling 116 trees, were sampled at various localities within the forest trimlines fronting the Agassiz and Jackson glaciers, Glacier National Park, Montana. Tree ages within these zones became progressively younger from the region of the maximum late-Neoglacial position to the bases of the bedrock slopes on which...
Plain geology
George Otis Smith
1981, Report
Aeromagnetic map of east-central United States
T.G. Hildenbrand, R.P. Kucks, R. W. Johnson Jr.
1981, Geophysical Investigations Map 948
U.S. Geological Survey...
Use of remote sensing for monitoring deforestation in tropical and subtropical latitudes
J. J. Talbot, Lawrence R. Pettinger
1981, Ciencia Interamericana (21) 63-71
Of the three types of remotely sensed data discussed here, Landsat data offers the greatest potential for monitoring broad changes in extensive tropical forest environments because of its low-cost, synoptic, repetitive coverage. Scientists from developing countries can choose from a variety of Landsat data classification techniques, thus enabling each country...
Remote sensing: a tool for park planning and management
William C. Draeger, Lawrence R. Pettinger
1981, Parks (6) 1-6
Remote sensing may be defined as the science of imaging or measuring objects from a distance. More commonly, however, the term is used in reference to the acquisition and use of photographs, photo-like images, and other data acquired from aircraft and satellites. Thus, remote sensing includes the use of such...
Considerations in planning a land use and land cover resources inventory update program
V.A. Milazzo
1981, Conference Paper, In-place resource inventories; principles and practices: Proceedings of a national workshop
No abstract available ...
Introduction and summary: Chlorinated hydrocarbons as a factor in the reproduction and survival of lake trout (Salvelinus namaycush) in Lake Michigan
Wayne A. Willford, Roger A. Bergstedt, William H. Berlin, Neal R. Foster, Robert J. Hesselberg, Michael J. Mac, Dora R. May Passino, Robert E. Reinert, Donald V. Rottiers
1981, Book chapter, Chlorinated hydrocarbons as a factor in the reproduction and survival of lake trout (Salvelinus namaycush) in Lake Michigan
Although lake trout (Salvelinus namaycush) were considered extinct in Lake Michigan by the mid 1950's, control of the parasitic sea lamprey (Petromyzon marinus) and extensive restocking resulted in an abundance of hatchery-produced lake trout in the lake by the early 1970's. However, no naturally produced yearling or older lake trout...
Etna erupts again; a VEST report of the March 1981 eruption of Mount Etna, Sicily
J. E. Guest, C.R.J. Kilburn, R. M. C. Lopes, J.B. Murray, H. Pinkerton, T.J.O Sanderson, S.C. Scott
1981, Earthquake Information Bulletin (USGS) (13) 134-139
A visit to Tangshan, China
J.M. Gere, H.C. Shah
1981, Earthquake Information Bulletin (USGS) (13) 4-11
Variations in the correlation of body size with concentrations of Cu and Ag in the bivalve Macoma balthica
Carol R. Strong, Samuel N. Luoma
1981, Canadian Journal of Fisheries and Aquatic Sciences (38) 1059-1064
The relationship between body size and concentrations of Cu and Ag varied from strongly positive to strongly negative in four populations of the bivalve Macoma balthica in San Francisco Bay. The correlations appeared to be influenced by the degree of enrichment in tissues, size-dependent differences and seasonal variations in growth rate, and...
News from the observatories; the Royal Observatory, Hong Kong
G. Bell
1981, Earthquake Information Bulletin (USGS) (13) 145-149
Volgograd and vicinity: a Landsat view
William A. Dando, Gary E. Johnson
1981, Journal of Geography (80) 235-237
Many diverse features can be discerned on the Landsat image of Volgograd and vicinity. Some of these features have resulted directly from man's alteration of the land surface in accordance with Stalin's and Khrushchev's plans for control of climate and for development in Volgograd and the surrounding area. Landsat images...
The Lake Bosumtwi impact crater, Ghana
William B. Jones, Michael Bacon, David A. Hastings
1981, Geological Society of America Bulletin (96) 342-349
The 1-m.y.-old Bosumtwi Crater, Ghana, has a nearly circular shape with a rim diameter of 11 km north-south and 10 km east-west. It is surrounded by a circular depression and an outer ridge of diameter 20 km. Polymict breccias averaging at least 20 m thick with clasts as much as...
Evaluation of Landsat Multispectral Scanner data for mapping vegetated soil landscapes
D. R. Thompson, Robert H. Haas, M. H. Milford
1981, Soil Science Society of America Journal (45) 91-95
Landsat multispectral scanner data for Brazos County, Texas, were evaluated in terms of effectiveness for classifying soils on vegetated landscapes at three times during the year: a time of normally adequate soil water, a time of expected soil water deficit, and a time when soil water is normally being replenished....
Strains of infectious hematopoietic necrosis (IHN) virus may be identified by structural protein differences
J.C. Leong, Ya Li Hsu, H. Mark Engelking, Daniel M. Mulcahy
D. P. Anderson, editor(s)
1981, Conference Paper, Fish biologics: Serodiagnostics and vaccines (Developments in biological standardization, volume 49)
The development of an effective vaccine to infectious hematopoietic necrosis virus (IHNV) in fish requires a knowledge of the virus serotypes in nature. At least two serotypes were found among three IHNV strains (12). Attempts in our laboratory to extend this study with additional virus strains by classical immunological techniques...
Audio-magnetotelluric investigation of the North End Wilderness Study Area, Cochise County, Arizona
Kevin H. Nervick, Frances M. Boler
1981, Open-File Report 81-774
No abstract available....
Simulative models for the analysis of ground-water flow in Vekol Valley, the Waterman Wash area, and the Bosque area, Maricopa and Pina Counties, Arizona
D. T. Matlock
1981, Open-File Report 82-77
Simulative ground-water flow models for Vekol Valley, the Waterman Wash area, and the Bosque area were developed for use in evaluating alternatives for developing a ground-water supply for the Ak-Chin Indian Community. The hydraulic properties of the basin-fill deposits used in the models were estimated primarily from aquifer tests made...
Seepage study of the Sevier River and the Central Utah, McIntyre, and Leamington Canals, Juab and Millard Counties, Utah
L. R. Herbert, R.W. Cruff, Walter F. Holmes
1981, Open-File Report 81-820
A study of the gains or losses of the Sevier River and the Central Utah, McIntyre, and Leamington Canals in the Leamington area, in Juab and Millard Counties, Utah, was made to determine changes in those reaches. Three to seven sets of seepage measurements made during 1980 were used in...
Geohydrologic reconnaissance of Lake Mead National Recreation Area: Las Vegas Wash to Opal Mountain, Nevada
R. L. Laney
1981, Open-File Report 82-115
The study is a geohydrologic reconnaissance of about 170 square miles in the Lake Mead National Recreation Area from Las Vegas Wash to Opal Mountain, Nevada. The study is one of a series that describes the geohydrology of the recreation area and that indentifies areas where water supplies can be...
Distribution and petrology of the Anderson-Coyote Reservoir volcanic rocks
John K. Nakata
1981, Open-File Report 80-1256
No abstract available....
Geotechnical laboratory test results on piston core samples taken from the mid-Atlantic upper continental slope by the U.S. Geological Survey during September 1979
Harold W. Olsen, James S. Booth, James E. Robb, William S. Gardner, Ram D. Singh, Paul G. Swanson, Paul W. Mayne, R. Gregory Hamadock
1981, Open-File Report 81-366
No abstract available....
