A geochemical study of the Eyasi I skull; implications for the process of fossilization
James L. Bischoff
1981, Book chapter, Die archaeologischen und anthropologischen Ergebnisse der Kohl-Larsen-Expeditionen in Nord-Tanzania 1933-1939 — The palaeoanthropological finds of the Pliocene and Pleistocene
No abstract available....
Eastern Indian 3800-million-year-old crust and early mantle differentiation
A. R. Basu, S.L. Ray, A.K. Saha, S.N. Sarkar
1981, Science (212) 1502-1506
Samarium-neodymium data for nine granitic and tonalite gneisses occurring as remnants within the Singhbhum granite batholith in eastern India define an isochron of age 3775 ± 89 × 106 years with an initial 143Nd/144Nd ratio of 0.50798 ± 0.00007. This age contrasts with the rubidium-strontium age of 3200 × 106 years for the...
Location of a caldera source for the Soldier Meadow Tuff, northwestern Nevada, indicated by gravity and aeromagnetic data: Summary
R. C. Greene, Donald Plouff
1981, GSA Bulletin (92) 4-6
No abstract available....
Location of a Caldera Source for the Soldier Meadow Tuff, Northwestern Nevada, Indicated by Gravity and Aeromagnetic Data
R. C. Greene, Donald Plouff
1981, GSA Bulletin (92) 39-57
The Soldier Meadow Tuff in north-western Nevada is part of a sequence of peralkaline and subalkaline rhyolitic rocks of Miocene age that occupies an area of about 1,600 km2 and has a volume of about 50 km3. The formation is mostly welded tuff containing abundant alkali feldspar and quartz phenocrysts in...
Overview of Mount St. Helens volcanic eruption
Robert I. Tilling
1981, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Dormant since 1857, Mount St. Helens Volcano in southwestern Washington stirred from its repose to erupt on March 27, 1980, following a week of premonitory earthquake activity. The eruption was the first in the conterminous United States since the 1914-1921 activity of Lassen Peak, California. The eruptive activity through May...
Comparison of two extraction methods for the analysis of petroleum hydrocarbon residues in mallard duck eggs by GC and GC-MS
A. A. Belisle, M. L. Gay, N. C. Coon
1981, Chemosphere (10) 1197-1203
Hydrocarbon residues in pooled eggs from a mallard duck on a diet of 25,000 ppm South Louisiana crude oil were compared after cleanup with and without saponification. The saponification procedure yielded superior reproducibility and extraction efficiency...
Effects of industrial effluents, heavy metals, and organic solvents on mallard embryo development
D. J. Hoffman, W. C. Eastin Jr.
1981, Toxicology Letters (9) 35-40
Mallard eggs were externally exposed at 3 and 8 days of incubation to 7 different industrial effluents and to 7 different heavy metal, organic solvent, and petroleum solutions to screen for potential embryo-toxic effects. This route of exposure was chosen in order to simulate the transfer of pollutant from the...
Effects of dietary nickel on mallards
W.C. Eastin, T. J. O'Shea
1981, Journal of Toxicology and Environmental Health (7) 883-892
Thirty breeding pairs of mallards (Anas platyrhynchos) were randomly assigned to one of five treatment groups and were fed breeder mash containing 0, 12.5, 50.0, 200.0, or 800.0 ppm Ni (as the sulfate) for 90 d. Ni ingestion had no effect on egg production, hatchability, or survival of ducklings. After...
Environmental metal residues in tissues of canvasbacks
W. James Fleming
1981, Journal of Wildlife Management (45) 508-511
Reduction and deterioration of habitat and high nest predation have contributed to the decline of the continental populations of canvasbacks (Aythya valisineria) (Trauger 1974). Environmental metal contaminants also may adversely affect reproduction and survival of waterfowl (Heinz 1974, 1976a,b, 1979; Finley and Stendell 1978). White et al. (1979) ex-...
Effects of chronic ingestion of No. 2 fuel oil on mallard ducklings
Robert C. Szaro, Gary L. Hensler, G. H. Heinz
1981, Journal of Toxicology and Environmental Health (7) 789-799
No. 2 fuel oil was fed to mallard (Anas platyrhynchos) ducklings in concentrations of 0.5 and 5.0% of the diet from hatching to 18 wk of age to assess the effects of chronic oil ingestion during early development. Five growth parameters (body weight, wing length, ninth primary length, tarsal length,...
Geologic setting, petrology, and geochemistry of zoned tungsten-bearing skarns at the Strawberry Mine, central Sierra Nevada, California
Warren J. Nokleberg
1981, Economic Geology (76) 111-133
The Strawberry mine, 90 km northeast of Fresno, California, occurs on the margin of a small roof pendant of Early Jurassic metasedimentary rocks and middle Cretaceous metaigneous rocks. Middle Cretaceous granitic intrusions surround and intrude the roof pendant. Adjacent to one granodiorite intrusion, several subvertical marble layers are replaced by...
Use of captive starlings to determine effects of pollutants on passerine reproduction
C.E. Grue, C.L. Christian
D.W. Lamb, E.E. Kenaga, editor(s)
1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference: A symposium
Three reproductive trials were conducted to develop techniques for propagation of captive starlings (Stumus vulgaris) which could determine the effects of environmental contaminants on passerine reproduction. Trials were conducted during the spring of 1979 in five adjacent 2.4 by 3 by 12-m outdoor wire pens containing four or ten pairs...
Population dynamics and bioenergetics of a fossorial herbivore, Thomomys talpoides (Rodentia: Geomyidae), in a spruce-fir sere
Douglas C. Andersen, James A. MacMahon
1981, Ecological Monographs (51) 179-202
Studies of the bioenergetics of the northern pocket gopher, Thomomys talpoides, are coupled with data on demography, activity budgets, and microclimates to model the energy requirements of individuals and populations in the Wasatch Mountains of Utah during 1976-1979. Metabolic rates during rest increased linearly with decreasing ambient temperature, but...
Broad area forest fuels and topography mapping using digital Landsat and terrain data
Mark Shasby, Robert E. Burgan, Gregg R. Johnson
1981, Conference Paper, Seventh international symposium: Machine processing of remotely sensed data
A spatially registered digital data base of fuels and terrain information was generated for a test site on the Lolo National Forest in Montana. The data base was developed specifically for providing spatially relevant data to a mathematical fire behavior model developed by the Forest Service which integrates this information...
Zooplankton fecal pellets link fossil fuel and phosphate deposits
K.G. Porter, E. I. Robbins
1981, Science (212) 931-933
Fossil zooplankton fecal pellets found in thinly bedded marine and lacustrine black shales associated with phosphate, oil, and coal deposits, link the deposition of organic matter and biologically associated minerals with planktonic ecosystems. The black shales were probably formed in the anoxic basins of coastal marine waters,...
Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise
Randolph A. Koski, James R. Hein
1981, Initial reports of the Deep Sea Drilling Project (62) 855-862
Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of...
Inorganic geochemistry of sediments and rocks from the Mid-Pacific Mountains and Hess Rise, Deep Sea Drilling Project Leg 62
Walter E. Dean
1981, Initial reports of the Deep Sea Drilling Project (62) 685-710
No abstract available. ...
Origin of organic-carbon-rich mid-Cretaceous limestones, Mid-Pacific Mountains and southern Hess Rise
Walter E. Dean, George E. Claypool, Jorn Thiede
1981, Initial reports of the Deep Sea Drilling Project (62) 877-890
Limestones of mid-Cretaceous age containing as much as 8.6 percent organic carbon were cored at one site (463) in the Mid-Pacific Mountains and at two sites (465, 466) on southern Hess Rise, central North Pacific Ocean, during Leg 62 of the Deep Sea Drilling Project. In the Mid-Pacific Mountains, three...
Development of the benethic nepheloid layer on the south Texas continental shelf, western Gulf of Mexico
Gerald L. Shideler
1981, Marine Geology (41) 37-61
A monitoring study of suspended sediment on the South Texas Continental Shelf indicates that a turbid benthic nepheloid layer is regionally persistent. A sequence of quasi-synoptic measurements of the water column obtained during six cruises in an 18-month period indicates substantial spatial and temporal variability in nepheloidlayer characteristics. Regionally, the...
Reservoir analysis of the Denver earthquakes: A case of induced seismicity
Paul A. Hsieh, John D. Bredehoeft
1981, Journal of Geophysical Research D: Atmospheres (86) 903-920
Injection of fluid wastes into the fractured Precambrian crystalline bedrock beneath the Rocky Mountain Arsenal near Denver triggered earthquakes in the 1960's. An analysis, based on the assumption that fluid flow in the fractured reservoir can be approximated by flow in a porous medium, is presented. The configuration and hydrologic...
Encounter with Saturn: Voyager 1 imaging science results
B.A. Smith, L. Soderblom, R. Beebe, J. Boyce, G. Briggs, A. Bunker, S.A. Collins, C.J. Hansen, T. V. Johnson, J.L. Mitchell, R.J. Terrile, M. Carr, A.F. Cook II, J. Cuzzi, James B. Pollack, G. Edward Danielson, A. Ingersoll, M. E. Davies, G.E. Hunt, H. Masursky, E. Shoemaker, D. Morrison, Tobias Owen, C. Sagan, J. Veverka, R. Strom, V.E. Suomi
1981, Science (212) 163-191
As Voyager 1 flew through the Saturn system it returned photographs revealing many new and surprising characteristics of this complicated community of bodies. Saturn's atmosphere has numerous, low-contrast, discrete cloud features and a pattern of circulation significantly different from that of Jupiter. Titan is shrouded in a...
Estimating rangeland cover proportions with large-scale color-infrared aerial photographs
Calvin J. Van Zee, Kris Bonner
1981, Conference Paper, Proceedings of the eighth biennial workshop on color aerial photography in the plant sciences
No abstract available....
Return of the gray wolf to Wisconsin
L. David Mech, R. M. Nowak
1981, American Midland Naturalist (105) 408-409
Five gray wolf (Canis lupus) specimens were examined from Wisconsin from 1975 through 1979; each had been killed by human beings, accidentally or intentionally. This confirms the presence of wolves in Wisconsin and supports the hypothesis that human-related mortality is the factor limiting the population....
Response of adult mallard ducks to ingested South Louisiana crude oil
Nancy C. Coon, Michael P. Dieter
1981, Environmental Research (24) 309-314
Adult mallards (Anas platyrhynchos) were fed South Louisiana crude oil as 0.25 and 2.5% of the total diet for 26 weeks to assess the chronic effects of oil ingestion. Additional birds were fed diets containing either 1.0% of a paraffin mixture or clean feed. No birds died during the study,...
Radio transmitters for mourning doves: A comparison of attachment techniques
Matthew Perry, G.H. Haas, James W. Carpenter
1981, Journal of Wildlife Management (45) 524-527
No abstract available. ...
