A.J. Horowltz
1986, Environmental Science & Technology (20) 155-160
No abstract available....
Search Results
183937 results.
Alternate formats: RIS file of the first 3000 search results | Download all results as CSV | TSV | Excel | RSS feed based on this search | JSON version of this page of results
Page 4872, results 121776 - 121800
Publication Extents
Not all publications have extents, not all extents are completely accurateP.M. Konrad, D.S. Gilmer
1986, Journal of Raptor Research (20) 35-39
Post-fledging activities of 18 Ferruginous Hawks (Buteo regalis) were studied in southcentral North Dakota during July and August 1979. The post-fledging period ranged from 10 to 40 d (mean = 23.1 d; N = 16). Haylands and native prairie grasslands were the principal land use types utilized by fledglings and...
K. L. Pierce, Steven M. Colman
1986, Geological Society of America Bulletin (97) 869-885
Terrace scarps can serve as a nearly ideal natural laboratory for the study of the evolution of slopes. This paper examines the effects of scarp size (height) and orientation (microclimate) by keeping constant variables such as age, lithology, and regional climate.If a scarp degrades as a closed system, and downslope...
E. R. Landa, C.L. Miller, D.M. Updegraff
1986, Health Physics (51) 509-518
[No abstract available]...
R.A. Cahill, J.D. Steele
1986, Hydrobiologia (143) 29-35
To determine recent sediment movement, we measured the levels of 137Cs (an artificial radionuclide produced during nuclear weapons testing) of 118 southern Lake Michigan samples and 27 in Green Bay. These samples, taken from 286 grab samples of the upper 3 cm of sediment, were collected in 1975 as part...
Cary T. Chiou, Ronald L. Malcolm, Terry I. Brinton, Daniel E. Kile
1986, Environmental Science & Technology (20) 502-508
No abstract available....
1986, Marine Geotechnology (6) 281-297
An analysis of the relationship between organic matter and liquid and plastic limits, and grain‐specific gravity of a marine sediment was accomplished by making a stepwise adjustment in the organic content of that sediment. The sample used was from Santa Barbara Basin (off southern California) and is typical of fine‐grained...
G.R. Hallberg
1986, Quaternary Science Reviews (5) 11-15
Recent investigations have documented the presence of several tills and interglacial paleosols that were not recognized in the simple Kansan-Aftonian-Nebraskan stratigraphic sequence. Also, the single 'Pearlette ash' recognized by early workers now is known to be three different Pearlette family ash beds of greatly contrasting ages. The complexity of the...
Gene Whitney, H. R. Northrop
1986, Clays and Clay Minerals (34) 488-495
An unusual vanadium chlorite precipitated during the formation of a vanadium-uranium ore deposit in the Henry Basin, southeastern Utah. The ore deposit formed by reduction and precipitation of U and V in the presence of organic matter at the interface between a stagnant brine and overlying, circulating meteoric water. Some...
R.F. Dill, E.A. Shinn, A.T. Jones, K. Kelly, R.P. Steinen
1986, Nature (324) 55-58
We report here the discovery of giant lithified subtidal columnar stromatolites (>2 m high) growing in 7-8 m of clear oceanic water in current-swept channels between the Exuma Islands on the eastern Bahama Bank. They grow by trapping ooid and pelletal carbonate sand and synsedimentary precipitation of carbonate cement within...
Marjorie S. Davenport, R.W. Skaggs
1986, Conference Paper, Paper - American Society of Agricultural Engineers
A field study was conducted to determine the effect of fabric wrap envelope and drain slope on the performance of a combination drainage and subirrigation system. Data were analyzed by examining relationships between flow rate and midpoint water table elevations. An entry resistance was defined and its value for each...
Frederick A. Kilpatrick, William R. Kaehrle
1986, Transportation Research Record 1-9
A comprehensive study and development of instruments and techniques for measuring all components of flow in a storm-sewer drainage system were undertaken by the U. S. Geological Survey under the sponsorship of FHWA. The study involved laboratory and field calibration and testing of measuring flumes, pipe insert meters, weirs, and...
Hsi-Ping Liu, Joseph J. Fedock, Jon B. Fletcher
1986, Conference Paper
Thirteen natural frequencies of a concrete arch dam (Monticello Dam near Sacramento, California) have been identified by using a dynamic testing method which employs an air gun firing in the reservoir as the excitation source. These vibrations modes are determined from the peak responses in the Fourier amplitude spectra of...
Arthur G. Scott
1986, Conference Paper
This paper summarizes the results from the first 3 years of a 5-year cost-effectiveness study of the U. S. Geological Survey streamgaging network. The objective of the study is to define and document the most cost-effective means of furnishing streamflow information. In the first step of this study, data uses...
Ronald E. Kirby, Lewis M. Cowardin
1986, Journal of Wildlife Management (50) 38-43
Seasonal survival of 109 adult female mallards (Anas platyrhynchos) fitted with radio transmitters was evaluated in northcentral Minnesota during 1968-74. Survival rates for the 169-day breeding and postbreeding period were: 1.0 during nest initiation (36 days), 0.798 during incubation (28 days), 0.943 during brood rearing (51 days), 0.947 during molt...
L.C. Price, T. Ging, A. Love, D. Anders
1986, Journal of Petroleum Geology (9) 313-342
We report on Soxhlet extraction (and subsequent related analyses) of 39 Lower Mississippian-Upper Devonian Bakken shales from the North Dakota portion of the Williston Basin, and analyses of 28 oils from the Basin. Because of the influence of primary petroleum migration, no increase in the relative or absolute concentrations of...
W. G. Pierce
1986, Contributions to Geology - University of Wyoming, Laramie (24) 77-90
Blackstone (1985) published an interpretation of South form detachment fault and related features. His interpretation of the area between Castle and Hardpan transverse faults is identical to mine of 1941. Subsequent detailed mapping has shown that the structure between the transverse faults is more complicated than originally envisioned and resurrected...
J.L. Clayton, N. H. Bostick
1986, Organic Geochemistry (10) 135-143
A suite of siltstone samples from the Upper Cretaceous Pierre Shale from the contact zone of a 130-cm thick igneous dike near Wolcott, Colorado, U.S.A., was taken from the contact to 170 cm from the dike to study the effects of temperature on the organic matter. The sampled bedding interval...
J. G. Palacas, D. Monopolis, C.A. Nicolaou, D.E. Anders
1986, Organic Geochemistry (10) 417-423
Biodegraded seep oils, devoid of n-alkanes and most isoprenoid hydrocarbons, were successfully correlated with subsurface crude oils in western Greece primarily using carbon isotopes and the more microbially resistant tricyclic terpane and aromatic steroid hydrocarbon distributions. All the studied oils seem to fit into three major genetic groups which are...
J. K. Arthur, R.E. Taylor
1986, Water Resources Bulletin (22) 1021-1029
As part of the Gulf Coast Regional Aquifer System Analysis (GC RASA) study, data from 184 geophysical well logs were used to define the geohydrologic framework of the Mississippi embayment aquifer system in Mississippi for flow model simulation. Five major aquifers of Eocene and Paleocene age were defined within this...
J.J. Hemley, G.L. Cygan, W. M. d’Angelo
1986, Geology (14) 377-379
Experimental studies were conducted at elevated pressures and temperatures on the combined solubilities of iron, zinc, and lead sulfides in chloride solutions buffered in pH by a silicate assemblage of quartz monzonite composition plus added muscovite, and buffered in/s2 and/o2 by the assemblage...
J.A. Tarduno, M. McWilliams, W.V. Sliter, H. E. Cook, M.C. Blake Jr., I. Premoli-Silva
1986, Science (231) 1425-1428
New paleomagnetic, paleontologic, and stratigraphic data from outcrops of the Laytonville Limestone (101 to 88 million years old) support a Southern Hemisphere orgin. A paleomagnetic megaconglomerate test is statistically significant and suggests magnetization at 14?? ?? 5?? south, predating Late Cretaceous to Eocene (70 to 50 million years ago) accretion....
W. E. Brooks
1986, Geology (14) 339-342
Metasomatized Tertiary lavas with anomalously high K2O and low Na2O content are distributed within the northwest-trending Miocene extensional terrane of southwestern Arizona. These rocks are common near core-complex–related detachment faults at Picacho Peak and the Harcuvar Mountains and in listric-faulted terrane at the...
Robert M. Hirsch
1986, Conference Paper, Oceans Conference Record (IEEE)
The US Geological Survey started, in a pilot phase, a program to provide nationally consistent information on the status and trends in the quality of the nation's fresh water. The program also intends to identify and describe the relationships between both the status and trends in water quality as they...
N.J. Page, D.A. Singer, B. C. Moring, C.A. Carlson, J.M. McDade, S. A. Wilson
1986, Economic Geology (81) 1261-1271
Rock samples from about 280 podiform chromite deposits in California and Oregon were analyzed for Pt, Pd, Rh, and Ir by fire assay-atomic absorption and spectrographic techniques to estimate by-product platinum-group element potential of chromite mining. These deposits include ophiolites from the Sierra...