Lead-isotopic data from sulfide minerals from the Cascade Range, Oregon and Washington
S. E. Church, A.P. LeHuray, A.R. Grant, M.H. Delevaux, J. E. Gray
1986, Geochimica et Cosmochimica Acta (50) 317-328
Lead-isotopic studies of mineral deposits associated with Tertiary plutons found in the Cascade Range of Oregon and Washington demonstrate a rather uniform isotopic composition in various sulfide minerals (206Pb204Pb= 18.84 to 19.05">206Pb204Pb= 18.84 to 19.05; 207Pb204Pb= 15.57 to 15.62">207Pb204Pb=...
An interpretation of induced electric currents in long pipelines caused by natural geomagnetic sources of the upper atmosphere
W.H. Campbell
1986, Surveys in Geophysics (8) 239-259
Electric currents in long pipelines can contribute to corrosion effects that limit the pipe's lifetime. One cause of such electric currents is the geomagnetic field variations that have sources in the Earth's upper atmosphere. Knowledge of the general behavior of the sources allows a prediction of the occurrence times, favorable...
Mars: A water-rich planet?
M. H. Carr
1986, Icarus (68) 187-216
Mars had outgassed at least 0.5 to 1 km of water, 10 to 20 bar of CO2, and 0.1 to 0.3 bar of N2. The volatiles that have been retained are mostly in the cratered uplands. Terrain softening, fretted channels, debris...
Interpretation and compendium of historical fire accounts in the Northern Great Plains
K.F. Higgins
1986, Resource Publication 161
This interpretation and compendium of historical fire accounts in the northern Great Plains provides resource managers with background information to justify the study or use of fire in management and provides a reference of historic fire accounts for those without ready access to major library collections. Historical accounts of fire...
Winter ecology of bald eagles in southcentral Nebraska
G.R. Lingle, Gary L. Krapu
1986, Prairie Naturalist (18) 65-78
Approximately 200 bald eagles wintered along a 370-km section of the Platte and North Platte rivers in Nebraska during the winters of 1978-79 and 1979-80. A preponderance of the wintering eagles were adults, with the adult:subadult ratio highest during the harsh winter of 1978-79. Nocturnal roosts were located primarily in...
Molt chronology of northern pintails in California
Michael R. Miller
1986, Journal of Wildlife Management (50) 57-64
Intensity and chronology of molt in 10 feather groups (head, neck, breast, belly, back, rump, side, scapular, tertial, and tail) were measured using percentages of developing feathers (pinfeathers) converted to molt scores (0-100) in samples plucked monthly from northern pintails (Anas acuta) collected by shooting from August through March 1980-82...
Response of rainbow trout to source and level of supplemental dietary methionine
H. A. Poston
1986, Comparative Biochemistry and Physiology, Part A: Physiology (83) 739-744
1. Methionine and total sulfur amino acid (TSAA) requirements of rainbow trout (Salmo gairdneri) were investigated by feeding graded isosulfurous levels of l- and dl-methionine, l-cystine, and the free acid and calcium forms of methionine hydroxy analog (MHA).2. Added cystine did not promote growth, survival or prevent...
Hydrogeologic framework of the Floridan aquifer system in Florida and in parts of Georgia, Alabama, and South Carolina
James A. Miller
1986, Professional Paper 1403-B
The Floridan aquifer system of the Southeastern United States is comprised of a thick sequence of carbonate rocks that are mostly of Paleocene to early Miocene age and that are hydraulically connected in varying degrees. The aquifer system consists of a single vertically continuous permeable unit updip and of two...
Distribution and habitat of Nitellopsis obtusa (Characeae) in the Laurentian Great Lakes
Donald W. Schloesser, Patrick L. Hudson, S. Jerrine Nichols
1986, Hydrobiologia (133) 91-96
Nitellopsis obtusa, a macroalga (Characeae) native to Europe and Asia, was found in U.S. waters of the St. Clair-Detroit River system in 1983, thus extending the range of this taxon into the Laurentian Great Lakes about 850 km from the St. Lawrence River where it was first discovered...
Salmonid whirling disease: Tubifex tubifex (Müller) identified as the essential oligochaete in the protozoan life cycle.
K. Wolf, M.E. Markiw, Jarl K. Hiltunen
1986, Journal of Fish Diseases (9) 83-85
No abstract available....
Influence of irrigation on salinity and nitrate in a stream-aquifer system
Leonard F. Konikow, M.A. Person
1986, Conference Paper, Conjunctive water use: understanding and managing surfacewater-groundwater interactions
Changes in salinity and nitrate concentration in groundwater and surface water in the semiarid Arkansas River valley of southeastern Colorado, USA were related primarily to irrigation practices. Water is applied to fields by flood irrigation through ditches and furrows. Irrigation water is derived in nearly equal amounts from surface water...
Patterns and causes of change in a cliff swallow colony during a 17-year period
Gary L. Krapu
1986, Prairie Naturalist (18) 109-114
The number of cliff swallow (Petrochelidon pyrrhonata) nests at a farmstead in southeastern North Dakota increased at an average annual rate of 87% with house sparrow (Passer domesticus) removal during 1957-60 and 1970-72. Harassment of nesting cliff swallows by house sparrows, adult swallow mortality from cold weather in late May,...
Tectonic significance of precambrian apatite fission-track ages from the midcontinent United States
K.D. Crowley, C. W. Naeser, C.A. Babel
1986, Earth and Planetary Science Letters (79) 329-336
Apparent apatite fission-track ages from drill core penetrating basement on the flank of the Transcontinental Arch in northwestern Iowa range from 934 ± 86 to 641 ± 90 Ma. These ages, the oldest reported in North America, record at least two...
Digital image measurement of the area and anatomical structure of tree rings
Thomas M. Yanosky, Charles J. Robinove
1986, Canadian Journal of Botany (64) 2896-2902
A microcomputer coupled to a video digitizer was used to develop methods for measuring areas of tree rings and for delineating and measuring microscopic anatomical features. Digitally imaged areas of individual rings of a loblolly pine cross section were within 2.6% of areas measured with a planimeter and were more...
Introduction
A.R. Drysdall, C.R. Ramsay, D. B. Stoeser
1986, Journal of African Earth Sciences (4)
Felsic plutonic rocks ranging from dioritic to granitic in composition and from 900 to 550 Ma in age are a major component of the Arabian Shield. These rocks and the potential for associated mineralization have been extensively investigated by the...
Aqueous geochemistry and diagenesis in the eastern Snake River Plain aquifer system, Idaho
Warren W. Wood, Walton H. Low
1986, Bulletin (97) 1456-1466
Water budget and isotopic analyses of water in the eastern Snake River Plain aquifer system confirm that most, if not all, of the water is local meteoric in origin. Solute mass-balance arguments suggest that ∼5 × 109 moles of calcite and 2.6 × 109 moles of silica are precipitated annually...
Vegetation mapping of Nowitna National Wildlife Refuge, Alaska using Landsat MSS digital data
Stephen S. Talbot, Carl J. Markon
1986, Photogrammetric Engineering and Remote Sensing (52) 791-799
A Landsat-derived vegetation map was prepared for Nowitna National Wildlife Refuge. The refuge lies within the middle boreal subzone of north central Alaska. Seven major vegetation classes and sixteen subclasses were recognized: forest (closed needleleaf, open needleleaf, needleleaf woodland, mixed, and broadleaf); broadleaf scrub (lowland, alluvial, subalpine); dwarf scrub (prostrate...
Isotopic constraints on the origin of the Atlantis II, Suakin and Valdivia brines, Red Sea
R.A. Zierenberg, Wayne C. Shanks III
1986, Geochimica et Cosmochimica Acta (50) 2205-2214
The origin of three Red Sea submarine brine pools was investigated by analysis of the S and O isotope ratios of dissolved sulfate and Sr isotope ratios of dissolved Sr in the brines. Sulfur and O isotope ratios of sulfate and Sr isotope ratios of evaporitic source rocks for the...
Isotopic variation in the Tuolumne Intrusive Suite, central Sierra Nevada, California
R. W. Kistler, B. W. Chappell, D. L. Peck, P. C. Bateman
1986, Contributions to Mineralogy and Petrology (94) 205-220
Granitoid rocks of the compositionally zoned Late Cretaceous Toulumne Intrusive Suite in the central Sierra Nevada, California, have initial87Sr/86Sr values (Sri) and143Nd/144Nd values (Ndi) that vary from 0.7057 to 0.7067 and from 0.51239 to 0.51211 respectively. The observed variation of both Sri and Ndi and of chemical composition in rocks...
Empirical Bayes estimates of duck population
Douglas H. Johnson
1986, Thesis
Obstacles facing the Venus radar mapper - The implications of gestalt formation in stereo-radargrammetry
R.L. Wildey
1986, Earth, Moon and Planets (36) 41-48
The question of adapting to radar images the existing hardware that form topographic maps through stereo-photogrammetric models, is examined in principle. Such hardware utilizes a human/computer hybrid. Although the problem of brightness differentials between corresponding landmarks can be dealt with pseudo-photoclinometrically, the main problem is whether the perspective in a...
Recent developments in the U. S. Geological Survey's Landsat image mapping program
Frederick S. Brownworth, Wayne G. Rohde
1986, Conference Paper, Technical Papers of the American Society of Photogrammetry, Fall Technical Meeting
At the 1984 ASPRS-ACSM Convention in Washington, D. C. a paper on 'The Emerging U. S. Geological Survey Image Mapping Program' was presented that discussed recent satellite image mapping advancements and published products. Since then Landsat image mapping has become an integral part of the National Mapping Program. The Survey...
U.S. Geological Survey toxic Waste-Groundwater Contamination Program, fiscal year 1985
S.E. Ragone
1986, Environmental Geology and Water Sciences (8) 129-132
In fiscal year 1982, the U S Geological Survey began an interdisciplinary research thrust entitled Toxic Waste-Groundwater Contamination Program The objective of the thrust was to provide earth sciences information necessary to evaluate and mitigate existing groundwater contamination problems resulting from the planned or inadvertant disposal...
Suspended sediment transport in an estuarine tidal channel within San Francisco Bay, California
R.W. Sternberg, D.A. Cacchione, D.E. Drake, K. Kranck
1986, Marine Geology (71) 237-258
A recently developed instrumentation system has been used to monitor simultaneously flow conditions and suspended sediment distribution in the bottom boundary layer of a tidal channel within San Francisco Bay, California. Measurements were made every 15 min over six successive flood and ebb tidal cycles. They included mean velocity profiles...
Applications of Landsat data and the data base approach
D. T. Lauer
1986, Photogrammetric Engineering and Remote Sensing (52) 1193-1199
A generalized methodology for applying digital Landsat data to resource inventory and assessment tasks is currently being used by several bureaux and agencies within the US Department of the Interior. The methodology includes definition of project objectives and output, identification of source materials, construction of the digital data base, performance...
