Breeding seasons of oceanic birds in a subarctic colony
Scott A. Hatch, Martha A. Hatch
1990, Canadian Journal of Zoology (68) 1664-1679
We studied the breeding seasons of marine birds on the Semidi Islands, western Gulf of Alaska, from 1976 to 1983. Distributions of laying or hatching observed in 11 species during 1–7 years are presented; less detailed information is available on the breeding schedules of three species. The combined laying period...
Distribucion y abundancia del manati, Trichechus manatus, en Venezuela
M. Correa-Viana, T. J. O'Shea, M.E. Ludlow, J.G. Robinson
1990, BioLlania (7) 101-123
Abstract not supplied at this time...
The influence of temperature and body size on duration of immobility in salamanders of the genus Desmognathus
C. Kenneth Dodd
1990, Amphibia-Reptilia (11) 401-410
No abstract available....
Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
T. J. O'Shea, H. I. Kochman
1990, Florida Marine Research Publications (49) 1-57
Abstract not supplied at this time...
Distribution of annual fishes (Pisces-Rivulidae) in the Rio Unare basin, Venezuela
J.E. Thomerson, D.C. Taphorn, L.G. Nico
1990, BioLlania (7) 33-38
Abstract not supplied at this time...
Mercury accumulation in yellow perch in Wisconsin seepage lakes: Relation to lake characteristics
W.G. Cope, J.G. Wiener, R.G. Rada
1990, Environmental Toxicology and Chemistry (9) 931-940
We studied relations between lacustrine characteristics and the total mercury (Hg) content of calendar age-2 yellow perch (Perca flavescens) in 10 seepage lakes in north-central Wisconsin. Mean concentrations and burdens (masses) of Hg in whole perch varied widely among lakes, were negatively correlated with lake pH and were positively correlated...
Effect of pH on the accumulation kinetics of pentachlorophenol in goldfish
G. R. Stehly, W. L. Hayton
1990, Archives of Environmental Contamination and Toxicology (19) 464-470
The kinetics of accumulation of pentachlorophenol (PCP) at various pH values were investigated to explore how pH-dependent accumulation might influence PCP toxicity. Goldfish (Carassius auratus) were exposed to 5 μg PCP/L in a static system buffered with 7.5 mM bicine orN,N-bis(2-hydroxyethyl)-2-aminoethane sulfonic acid (BES) at pH 7.0, 8.0, or 9.0....
H, O, Sr, Nd, and Pb isotope geochemistry of the Latir volcanic field and cogenetic intrusions, New Mexico, and relations between evolution of a continental magmatic center and modifications of the lithosphere
C.M. Johnson, P. W. Lipman, G.K. Czamanske
1990, Contributions to Mineralogy and Petrology (104) 99-124
Over 200 H, O, Sr, Nd, and Pb isotope analyses, in addition to geologic and petrologic constraints, document the magmatic evolution of the 28.5-19 Ma Latir volcanic field and associated intrusive rocks, which includes multiple stages of crustal assimilation, magma mixing, protracted crystallization, and open- and closed-system evolution in the...
A dolomitized shelf edge hardground in the northern Gulf of Mexico - Reply
Lawrence J. Poppe, Ronald C. Circe, April K. Vuletich
1990, Sedimentary Geology (68) 309-310
We (Poppe et al., 1990) agree with Gerald Friedman that the anaerobic oxidation of methane is important to the early diagenetic cementation by carbonates, but we feel that a few points need clarification....
Preliminary geologic map of the Mohave Mountains area, Mohave County, western Arizona
K. A. Howard, J. E. Nielson, H. G. Wilshire, J. K. Nakata, J. W. Goodge, Steven L. Reneau, Barbara E. John, V. L. Hansen
1990, Open-File Report 90-684
No abstract available....
Precambrian terrane of north-central Wisconsin: an aeromagnetic perspective
E. R. King
1990, Canadian Journal of Earth Sciences (27) 1472-1477
A shaded relief magnetic map covering most of the region of exposed Precambrian rocks of north-central Wisconsin shows the structural grain and many lithologic units with clarity and comprehensive detail. The area includes part of the volcanic sequence of the Keweenawan Supergroup south of Lake Superior, the southern margin of...
Recent geophysical and geological research in Antarctica related to the assessment of petroleum resources and potential environmental hazards to their development
John C. Behrendt
John F. Splettstoesser, Gisela A. M. Dreschoff, editor(s)
1990, Book chapter, Mineral resources potential of Antarctica
During the 6-year negotiation of and adoption of the Convention on the Regulation of Antarctic Mineral Resources Activities on June 2, 1988, various countries have increased their attention to the possibility of exploitation of Antarctica's petroleum resources, which are covered by this treaty. However, there are no known petroleum resources...
Small domes on Venus: Probable analogs of Icelandic lava shields
James B. Garvin, Richard S. Williams Jr.
1990, Geophysical Research Letters (17) 1381-1384
On the basis of observed shapes and volumetric estimates, we interpret small, dome-like features on radar images of Venus to be analogs of Icelandic lava-shield volcanoes. Using morphometric data for venusian domes in Aubele and Slyuta (in press), as well as our own measurements of representative dome volumes and areas...
1986 Great Lakes Seismic refraction survey (GLIMPCE): Line A - refraction mode
Patrick Morel-a-l’Huissier, John H. Karl, Anne M. Trehu, Zoltan Hajnal, Robert F. Mereu, Robert P. Meyer, John L. Sexton, C. Patrick Ervin, Alan G. Green, Deborah Hutchinson
1990, Geological Survey of Canada Open File 2283
In the fall of 1986, the Geological Survey of Canada (GSC), the United States Geological Survey (USGS), two Canadian universities -- University of Western Ontario and University of Saskatchewan, and four American universities -- Northern Illinois University, Southern Illinois University, University of Wisconsin-Madison and University of Wisconsin-Oshkosh participated in a...
Quality and character of Pakistan Coal
Peter D. Warwick, Shahid Javed
A.H Kazmi, R.A. Siddiqi, editor(s)
1990, Book chapter, Significance of the coal resources of Pakistan
No abstract available....
The need for the International Decade of Natural Hazard Reduction
F. Press
1990, Earthquakes & Volcanoes (USGS) (22) 190-192
Natural disasters affect countires large and small, rich or poor, whatever their political persuasion. The toll exacted by natural calamities each year drains the human and economic resources of every nation and stands as one of the formidable barriers to national, regional, and world development. Over the last 20 years, natural...
Present state of studies of volcanic risk in Colombia
C. A. Carvajal
1990, Earthquakes & Volcanoes (USGS) (22) 226-226
Because of the reactivation of Nevado del Ruiz volcano in the last days of 1984, we began studies whose purpose was directed toward the identification of hte risks that accompanied such volcanic activity. As a result of these investigations there appeared a preliminary map of volcanic risk in Octoer 7,...
Can an earthquake prediction and warning system be developed?
Ambraseys N.N
1990, Earthquakes & Volcanoes (USGS) (22) 204-205
Natural disasters affect countries large and small, rich, or poor, whatever their political persuasion. The toll exacted by natural calamities each year drains the human and economic resources of every nation and stands as one of the formidable barriers to national, regional, and world development. Over the last 20 years, natural...
Woodford shale in the Anadarko basin: Could it be another 'Bakken type' horizontal target?
Timothy C. Hester, James W. Schmoker, Howard L. Sahl
1990, Oil & Gas Journal (88) 73-78
The Woodford shale is one of several organic rich "black" shales of late Devonian and early Mississippian age present in basins of the North American craton. Where thermally mature, these black shales are economically important as hydrocarbon source rocks. The Woodford shale is widely regarded as a major source rock...
The quantitative determination of FeS2 phases in coal by means of 57Fe Mössbauer spectroscopy
B.J. Evans, Hobart M. King, John J. Renton, A. Stiller
1990, Hyperfine Interactions (57) 2187-2193
A knowledge of the concentration of pyrite and marcasite in coals can provide important insight into the genesis of coal deposits. Determinations of the relative amounts of pyrite and marcasite by traditional methods of coal analysis are, however, beset with many difficulties. Using 57Fe Mössbauer spectroscopy and a mild chemical...
Geotechnical engineering for ocean waste disposal. An introduction
Homa J. Lee, Kenneth R. Demars, Ronald C. Chaney
Demars Kenneth R.Chaney Ronald C., editor(s)
1990, Conference Paper, ASTM Special Technical Publication
As members of multidisciplinary teams, geotechnical engineers apply quantitative knowledge about the behavior of earth materials toward designing systems for disposing of wastes in the oceans and monitoring waste disposal sites. In dredge material disposal, geotechnical engineers assist in selecting disposal equipment, predict stable characteristics of dredge mounds, design mound...
Multi-model stereo restitution
K.S. Dueholm
1990, Photogrammetric Engineering and Remote Sensing (56) 239-242
Methods are described that permit simultaneous orientation of many small-frame photogrammetric models in an analytical plotter. The multi-model software program enables the operator to move freely between the oriented models during interpretation and mapping. Models change automatically when the measuring mark is moved from one frame to another, moving to...
Diet of canvasbacks during breeding
J. E. Austin, J.R. Serie, J.H. Noyes
1990, Prairie Naturalist (22) 171-176
We examined diets of canvasbacks (Aythya valisineria) breeding in southwestern Manitoba during 1977-81. Percent volume of animal foods consumed did not differ between males and females nor among prenesting, rapid follicle growth, laying, incubation, and renesting periods in females (mean = 50.1%). Tubers and shoots of fennelleaf pondweed (Potamogeton pectinatus)...
Simulation of rockfalls triggered by earthquakes
Y. Kobayashi, E. L. Harp, T. Kagawa
1990, Rock Mechanics and Rock Engineering (23) 1-20
A computer program to simulate the downslope movement of boulders in rolling or bouncing modes has been developed and applied to actual rockfalls triggered by the Mammoth Lakes, California, earthquake sequence in 1980 and the Central Idaho earthquake in 1983. In order to reproduce a movement mode where bouncing predominated,...
Use of social indices to predict reproductive success in canvasbacks
Jerome R. Serie, Lewis M. Cowardin
1990, Journal of Wildlife Management (54) 66-72
We correlated temporal changes in social groupings of canvasbacks (Aythya valisineria) breeding near Minnedosa, Manitoba, with an independent estimate of hen success during 1974-80. Roadside counts of pairs, lone males, and flocked males were made along transects at 5-day intervals, normalized to percentages to allow comparisons among years, and plotted...
