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Page 4697, results 117401 - 117425

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Not all publications have extents, not all extents are completely accurate
Internal tides and sediment movement on Horizon Guyot, Mid-Pacific Mountains
D.A. Cacchione, W. C. Schwab, M. Noble, G. Tate
1988, Geo-Marine Letters (8) 11-17
Internal tidal currents are the likely cause of erosional features such as current ripples, sand waves, and truncated bedding horizons on the sediment cap of Horizon Guyot. Current meter data obtained over a 9 month period in 1983-1984 at about 213 m above the guyot show that the tidal currents...
Normalization of oxygen and hydrogen isotope data
T.B. Coplen
1988, Chemical Geology: Isotope Geoscience Section (72) 293-297
To resolve confusion due to expression of isotopic data from different laboratories on non-corresponding scales, oxygen isotope analyses of all substances can be expressed relative to VSMOW or VPDB (Vienna Peedee belemnite) on scales normalized such that the δ18O of SLAP is −55.5% relative to VSMOW.H3+ contribution in hydrogen isotope ratio analysis can...
Fluid inclusions in vadose cement with consistent vapor to liquid ratios, Pleistocene Miami Limestone, southeastern Florida
C.E. Barker, R. B. Halley
1988, Geochimica et Cosmochimica Acta (52) 1019-1025
Vadose cements in the Late Pleistocene Miami Limestone contain regions with two-phase aqueous fluid inclusions that have consistent vapor to liquid (V-L) ratios. When heated, these seemingly primary inclusions homogenize to a liquid phase in a range between 75°C and 130°C (mean = 100°C) and have final melting temperatures between...
Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore
P.M. Okita, J.B. Maynard, E.C. Spiker, E. R. Force
1988, Geochimica et Cosmochimica Acta (52) 2679-2685
Unlike other marine-sedimentary manganese ore deposits, which are largely composed of manganese oxides, the primary ore at Molango (Hidalgo State, Mexico) is exclusively manganese carbonate (rhodochrosite, Mn-calcite, kutnahorite). Stable isotope studies of the carbonates from Molango provide critical new information relevant to the controversy over syngenetic and diagenetic models of...
Relation of pH to toxicity of lampricide TFM in the laboratory
T.D. Bills, L. L. Marking, G.E. Howe, J.J. Rach
1988, Technical Report 53
In the control of larval sea lamprey (Petromyzon marinus ) with 3-trifluoromethyl-4-nitrophenol (TFM) in tributaries of the Great Lakes, occasional kills of other fishes have caused concern about the effects of the chemical on non-target organisms. Stream treatment rates have been based on previous application rates, alkalinity...
Key to acanthocephala reported in waterfowl
Malcolm E. McDonald
1988, Resource Publication 173
This is the third part of a continuing series on helminths reported in waterfowl (McDonald 1974, 1981). Coots and moorhens (in Family Rallidae, Order Gruiformes) are included with the Anatidae of Anseriformes. The goal of these studies i complete coverage of waterfowl helminths of the world, although the original incentive-inadequate...
Testing for individual variation in breeding success
Scott A. Hatch
1988, The Auk (105) 193-194
I measured the breeding success of Northern Fulmars (Fulmarus glacialis) in 6 consecutive years at a colony in the Semidi Islands, western Gulf of Alaska (56°N, 156°W). I tabulated the frequency distribution of the number of years successful for a sample of 224 nest sites at which breeding occurred in...
Interactions between seabirds and fisheries in the North Pacific Ocean
Linda L. Jones, Anthony R. DeGange
Joanna Burger, editor(s)
1988, Book chapter, Seabirds & other marine vertebrates: Competition, predation, and other interactions
Interactions between commercial fisheries and seabirds in the northern Pacific Ocean are increasing with rising consumption of fishery products. As fishing expands into remote areas previously not fished, additional populations of seabirds may be affected. Some interactions such as introduction of fish processing wastes into the environment may be beneficial...
Marine petroleum source rocks and reservoir rocks of the Miocene Monterey Formation, California, U.S.A
C.M. Isaacs
1988, Book chapter, Petroleum resources of China and related subjects
The Miocene Monterey Formation of California, a biogenous deposit derived mainly from diatom debris, is important both as a petroleum source and petroleum reservoir. As a source, the formation is thought to have generated much of the petroleum in California coastal basins, which are among the most prolific oil provinces...
What was that?
F. M. Anglin, R. A. W. Haddon
1988, Earthquakes & Volcanoes (USGS) (20) 161-166
At 4:20 local time on September 19, 1986, Mrs. Laurie Harder saw a meteor passing across the sky above her home in Yellowknife, N.W.T. She reported her observation to Yellowknife Seismic Station staff who examined the records of the Yellowknife seismic array to see if the associated meteoroid had hit...
Chemical characterization and mutagenic properties of polycyclic aromatic compounds in sediment from tributaries of the Great Lakes
David L. Fabacher, Christopher J. Schmitt, John M. Besser, Michael J. Mac
1988, Environmental Toxicology and Chemistry (7) 529-543
Sediments from four inshore industrial sites and a reference site in the Great Lakes were extracted with solvents and characterized chemically for polycyclic aromatic compounds (PACs). An aqueous phase and a crude organic extract were obtained. The crude organic extract was further resolved into fractions A-2 (polycyclic aromatic hydrocarbons) and...
Effect of submersed aquatic macrophytes on resource partitioning in yearling rock bass (Ambloplites rupestris) and pumpkinseeds (Lepomis gibbosus) in Lake St. Clair
John R. P. French III
1988, Journal of Great Lakes Research (14) 291-300
Yearling rock bass (Ambloplites rupestris), pumpkinseeds (Lepomis gibbosus), macroinvertebrates, and submersed aquatic plants were sampled at 2- or 3-week intervals from June to October 1979 in a shallow, heavily vegetated embayment in Lake St. Clair to determine whether seasonal changes in plant canopy and plant taxonomic composition affected resource partitioning...
Relationships of phytomacrofauna to surface area in naturally occurring macrophyte stands
Charles L. Brown, Thomas P. Poe, John R. P. French III, Donald W. Schloesser
1988, Journal of the North American Benthological Society (7) 129-139
Most studies of the relationships between freshwater macrophytes and phytomacrofauna, or the macroinvertebrates associated with the macrophytes, have been based on individual plant collections or samples from monotypic plant stands. We describe the phytomacrofauna assemblages within naturally occurring, taxonomically mixed stands, and consider how macrophyte surface area and plant...
Comparison of hatchery-reared lake trout stocked as fall fingerlings and as spring yearlings in Lake Ontario
Joseph H. Elrod, David E. Ostergaard, Clifford P. Schneider
1988, North American Journal of Fisheries Management (8) 455-462
We made 16 paired releases of lake trout Salvelinus namaycush of four year classes (1979–1982) at five locations to compare survival and growth of hatchery-reared fish stocked as fall fingerlings (FF) and as spring yearlings (SY). Comparisons were based on fish at ages 2–8 recovered with bottom trawls, with gill nets, and...
Carbon isotope geochemistry of hydrocarbons in the Cerro Prieto geothermal field, Baja California Norte, Mexico
D.J. Des Marais, M.L. Stallard, N.L. Nehring, A.H. Truesdell
1988, Chemical Geology (71) 159-167
Hydrocarbon abundances and stable-isotopic compositions were measured in wells M5, M26, M35 and M102, which represent a range of depths (1270-2000 m) and temperatures (275-330??C) in the field. In order to simulate the production of the geothermal hydrocarbons, gases were collected from the pyrolysis of lignite in the laboratory. This...
Persistent toxic substances and the health of fish communities in the Great Lakes
Wayne A. Willford
Marlene S. Evans, editor(s)
1988, Book chapter, Toxic contaminants and ecosystem health: a Great Lakes focus
The role, if any, of toxic substances in bringing about changes in the productivity and status of fishery resources, is not well understood. At the 'Workshops on Persistent Toxic Substances and the Health of the Aquatic Community,' the Fish Biota Discussion Subgroup considered the issue of toxic substances by...
Multi-model approach to petroleum resource appraisal using analytic methodologies for probabilistic systems
R. A. Crovelli
1988, Mathematical Geology (20) 955-972
The geologic appraisal model that is selected for a petroleum resource assessment depends upon purpose of the assessment, basic geologic assumptions of the area, type of available data, time available before deadlines, available human and financial resources, available computer facilities, and, most importantly, the available quantitative methodology with corresponding computer...
Newly discovered sedimentary rock-hosted disseminated gold deposits in the People's Republic of China
Charles G. Cunningham, Roger P. Ashley, I. #NAME? Chou, Huang Zushu, Wan Chaoyuan, Li Wenkang
1988, Economic Geology (83) 1462-1467
Five deposits discovered in Guizhou Province, Yata, Getang, Sanchahe, Ceyang, and Banqi are described for the first time in Western literature. The deposits have geologic features and geochemical signatures that are remarkably similar to those of sedimentary rock-hosted precious metal deposits in the United States. The sizes of the deposits...
The Whittier Narrows, California earthquake of October 1, 1987: Preliminary assessment of strong ground motion records
A. G. Brady, E. C. Etheredge, R. L. Porcella
1988, Earthquake Spectra (4) 55-74
More than 250 strong-motion accelerograph stations were triggered by the Whittier Narrows, California, earthquake of 1 October 1987. Considering the number of multichannel structural stations in the area of strong shaking, this set of records is one of the more significant in history. Three networks, operated by the U.S. Geological...