Populations and habitat use of marine birds in the Semidi Islands, Alaska
Scott A. Hatch, Martha A. Hatch
1983, Murrelet (64) 39-46
About one-quarter of the resident seabirds in the Gulf of Alaska breed on the Semidi Islands. In terms of biomass, the proportion is closer to one-third. The most abundant birds are Common and Thick-billed Murres, with a combined population exceeding 1 million birds. Hundreds of thousands of Horned Puffins breed...
Afternoon closure of hunting and recovery rates of mallards banded in Minnesota
Ronald E. Kirby, James E. Hines, James D. Nichols
1983, Journal of Wildlife Management (47) 209-213
No abstract available. ...
Size variation of ungraded and graded channel catfish reared in cages
Donald C. Greenland, W.R. Robison, S.H. Newton
1983, Arkansas Academy of Science Proceedings (37) 34-35
Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts
K. Futa, W.E. Le Masurier
1983, Contributions to Mineralogy and Petrology (83) 38-44
The Nd and Sr isotopic ratios on a suite of continental alkali basalts from Marie Byrd Land, West Antarctica, define a change in the source over the range of K/Ar dates between 1 and 28 m.y. ago. The 87Sr/86Sr isotopic ratios (0.7026 to 0.7031) are unusually low for continental alkali...
The use of sagebrush (Artemisia) as a biogeochemical indicator of base-metal deposits in Precambrian rocks of west-central Colorado
T.G. Lovering, J. A. Hedal
1983, Journal of Geochemical Exploration (18) 205-230
The efficacy of sagebrush (Artemisia) as a biogeochemical indicator of base-metal mineralization in stratabound Precambrian ore deposits in west-central Colorado was investigated by collecting new (mostly flowering) growth from several sagebrush shrubs over and near five such deposits in three different areas. These are the Sedalia mine and two mines...
Landsat analysis of the Yangjiatan tungsten district, Hunan Province, People's Republic of China
W. D. Carter, T. H. Kiilsgaard
1983, Advances in Space Research (3) 113-123
The Yangjiatan tungsten district at latitude 27??28??? N. and longitude 111??54???E. is located about 140 km southwest of the city of Changsha and 35 km northeast of the town of Shaoyang, southeast Hunan Province, People's Republic of China. The deposits, consisting largely of scheelite in veins (Wang, 1975), are contained...
Sm-Nd age and isotopic systematics of the bimodal suite, ancient gneiss complex, Swaziland
R. W. Carlson, D.R. Hunter, F. Barker
1983, Nature (305) 701-704
Studies of the development and stabilization of the Archaean crust often focus on the relative temporal relationships between the metamorphosed basaltic to ultramafic volcanic units (greenstone belts) and the sialic gneiss terrains that make up the oldest sections of the terrestrial crust. At the heart of this interest are the...
Recent geologic development of Lake Michigan (U.S.A.)
D.L. Gross, R.A. Cahill
1983, Hydrobiologia (103) 193-198
The stresses placed on Lake Michigan since the advent of industrialization require knowledge of the sedimentology of the whole lake in order to make informed decisions for environmental planning. Sediment accumulation rates are low: areas of the lake receiving the most sediment average only 1 mm a-1; deep-water basins average...
The Eastern Gas Shales Project (EGSP) Data System: A case study in data base design, development, and application
T. S. Dyman, L.A. Wilcox
1983, Journal of the International Association for Mathematical Geology (15) 363-369
The U.S. Geological Survey and Petroleum Information Corporation in Denver, Colorado, developed the Eastern Gas Shale Project (EGSP)Data System for the U.S. Department of Energy, Morgantown, West Virginia. Geological, geochemical, geophysical, and engineering data from Devonian shale samples from more than 5800 wells and outcrops in the Appalachian basin were...
Bedform distribution and inferred sand transport on Georges Bank, United States Atlantic continental shelf.
D.C. Twichell
1983, Sedimentology (30) 695-710
Four bedform provinces have been identified using sidescan-sonar and echo-sounding techniques: large sand waves superimposed on sand ridges, small sand waves, megaripples, and featureless seafloor. Sand-wave asymmetry and surface-sediment texture have been used to infer bedload transport paths and although the asymmetry of megaripples could not be determined, the occurrence...
DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.
C.A. Palmer, R.H. Filby
1983, Conference Paper
A procedure has been developed using low temperature ashing, followed by size and sink-float separation of the ash, X-ray diffraction analysis, and instrumental neutron activation analysis to give both qualitative and quantitative information for major, minor and trace minerals and their associated trace elements in coal....
Correlation of metal occurrence and terrane attributes in the northwestern conterminous United States
E. W. Tooker
1983, Canadian Journal of Earth Sciences (20) 1030-1039
The regional distribution patterns for 20 critical metals derived by an areal-pattern recognition technique leads me to conclude that metals are regularly distributed preferentially in the accreted and cratonic terranes studied in and surrounding the state of Oregon in the northwestern United States. The distribution patterns along distinctively different zones...
River discharge controls phytoplankton dynamics in the northern San Francisco Bay estuary
J. E. Cloern, A.E. Alpine, B.E. Cole, R.L.J. Wong, J.F. Arthur, M.D. Ball
1983, Estuarine, Coastal and Shelf Science (16) 415-429
Phytoplankton dynamics in the upper reach of the northern San Francisco Bay estuary are usually characterized by low biomass dominated by microflagellates or freshwater diatoms in winter, and high biomass dominated by neritic diatoms in summer. During two successive years of very low river discharge (the drought of 1976-77), the...
Crustal structure of the northern mississippi embayment and a comparison with other continental rift zones
Walter D. Mooney, M.C. Andrews, A. Ginzburg, D.A. Peters, R. M. Hamilton
1983, Tectonophysics (94) 327-348
Previous geological and geophysical investigations have suggested that the Mississippi Embayment is the site of a Late Precambrian continental rift that was reactivated in the Mesozoic. New information on the deep structure of the northern Mississippi Embayment, gained through an extensive seismic refraction survey, supports a rifting hypothesis. The data...
Groundwater contamination by organic bases derived from coal-tar wastes
W. E. Pereira, C.E. Rostad, J.R. Garbarino, M. F. Hult
1983, Environmental Toxicology and Chemistry (2) 283-294
A fluid sample from a shallow aquifer contaminated by coal-tar wastes was analyzed for organic bases. The sample consisted of a mixture of aqueous and oily-tar phases. The phases were separated by centrifugation and filtration. Organic bases were isolated from each phase by pH adjustment and solvent extraction. Organic bases...
Structure, burial history, and petroleum potential of frontal thrust belt and adjacent foreland, southwest Montana
W. J. Perry Jr., B. R. Wardlaw, N. H. Bostick, E. K. Maughan
1983, American Association of Petroleum Geologists Bulletin (67) 725-743
The frontal thrust belt in the Lima area of southwestern Montana consists of blind (nonsurfacing) thrusts of the Lima thrust system beneath the Lima anticline and the Tendoy thrust sheet to the west. The Tendoy sheet involves Mississippian through Cretaceous rocks of the southwest-plunging nose of the Mesozoic Blacktail-Snowcrest uplift...
Development of reaction models for ground-water systems
Niel Plummer, D.L. Parkhurst, D.C. Thorstenson
1983, Geochimica et Cosmochimica Acta (47) 665-685
Methods are described for developing geochemical reaction models from the observed chemical compositions of ground water along a hydrologic flow path. The roles of thermodynamic speciation programs, mass balance calculations, and reaction-path simulations in developing and testing reaction models are contrasted. Electron transfer is included in the mass balance equations...
The relationship of acquisition systems to automated stereo correlation.
A. P. Colvocoresses
1983, Photogrammetric Engineering and Remote Sensing (49) 539-544
Today a concerted effort is being made to expedite the mapping process through automated correlation of stereo data. Stereo correlation involves the comparison of radiance (brightness) signals or patterns recorded by sensors. Conventionally, two-dimensional area correlation is utilized but this is a rather slow and cumbersome procedure. Digital correlation can...
Crustal and upper mantle structure of the northern and central Sierra Nevada
B.B. Mavko, G. A. Thompson
1983, Journal of Geophysical Research Solid Earth (88) 5874-5892
Teleseismic data were recorded within the Sierra Nevada to look for lateral variations in the upper mantle. The data were collected at both temporary and permanent stations, and P wave residuals were computed. After correcting the P residual data for crustal and topographic effects, there is still a variation of as much as 0.5-0.6...
Chryse Basin channels: low-gradients and ponded flows.
Baerbel K. Lucchitta, H.M. Ferguson
1983, Journal of Geophysical Research (88) A553-A568
Gradients on the floors of the Martian outflow channels that are derived from radar-elevation profiles across Lunae Planum and Chryse Basin have much lower values than those obtained from the U.S. Geological Survey's topographic map. Whereas the gradients of Maja and Ares Valles are similar to those of the catastrophic...
The saltwater-freshwater interface in the Tertiary limestone aquifer, southeast Atlantic outer-continental shelf of the U.S.A.
R.H. Johnston
1983, Journal of Hydrology (61) 239-249
Hydrologic testing in an offshore oil well abandoned by Tenneco, Inc., determined the position of the saltwater-freshwater interface in Tertiary limestones underlying the Florida-Georgia continental shelf of the U.S.A. Previous drilling (JOIDES and U.S.G.S. AMCOR projects) established the existence of freshwater far offshore in this area. At the Tenneco well...
A teleseismic analysis of the New Brunswick earthquake of January 9, 1982
G. L. Choy, J. Boatwright, J. W. Dewey, S.A. Sipkin
1983, Journal of Geophysical Research Solid Earth (88) 2199-2212
The analysis of the New Brunswick earthquake of January 9, 1982, has important implications for the evaluation of seismic hazards in eastern North America. Although moderate in size (mb 5.7), it was well-recorded teleseismically. Source characteristics of this earthquake have been determined from analysis of data that were digitally recorded by...
SUBMICROSCOPIC ( less than 1 mu m) MINERAL CONTENTS OF VITRINITES IN SELECTED BITUMINOUS COAL BEDS.
J.A. Minkin, E. C. T. Chao, C.L. Thompson, M.-V. Wandless, F.T. Dulong, R.R. Larson, S.G. Neuzil
Gooley Ron, editor(s)
1983, Conference Paper, Proceedings, Annual Conference - Microbeam Analysis Society
An important aspect of the petrographic description of coal is the characterization of coal quality, including chemical attributes. For geologic investigations, data on the concentrations, distribution, and modes of occurrence of minor and trace elements provide a basis for reconstructing the probable geochemical environment of the swamp material that was...
Mammoth Lakes earthquakes and ground uplift: precursors to possible volcanic activity ( USA)?
R. A. Bailey
1983, Earthquake Information Bulletin (USGS) (15) 88-101
Recent seismicity and ground uplift in the area are described. A comparison with other areas in the Cascades is made and the possibility of the Long Valley Magma Chamber as a source for eruptions is discussed. -P.N.Chroston...
Origin of concretionary Mn-Fe-oxides in stream sediments of Maine, U.S.A.
G.A. Nowlan, J. B. McHugh, T. D. Hessin
1983, Chemical Geology (38) 141-156
Studies of stream and sediment-pore waters largely explain the genesis of concretionary Mn-Fe-oxides in Maine. Waters of two small streams near Jackman, Maine, were studied in terms of pH, Eh, dissolved oxygen, dissolved organic carbon, dissolved Mn, total dissolved Fe, and ferrous and ferric Fe. Pyrite Creek has profuse concretions...
