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Page 4175, results 104351 - 104375

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Not all publications have extents, not all extents are completely accurate
Black duck population units as determined by patterns of band recovery
G.W. Pendleton, J.R. Sauer
D.R. McCullough, R.H. Barrett, editor(s)
1992, Book chapter, Wildlife 2001: Populations.
To estimate regional survival and band recovery rates for waterfowl populations, banding sites must be grouped for data analysis. We group American black duck banding sites using cluster analysis of pairwise comparisons of the distributions of band recoveries. We propose 6 population units, substantially fewer than the 27 black duck...
A comparison of the nesting success of mourning doves and American robins in conventionally managed and organic orchards
K.M. Fluetsch
1992, Book
A comparative study was undertaken to document more closely the effects of operational pesticide use on non-target avian species. Mourning Dove (Zenaida macroura) and American Robin (Turdus migratorius) nesting activity was monitored in three organic and three conventional orchards during two breeding seasons. Surveys were conducted to characterize...
Forum on land use and land Cover: Summary report
U.S. Environmental Protection Agency, Water Resources Division, U.S. Geological Survey
1992, Book
This report includes the agenda and abstracts of presentations from the Forum on Land Use and Land Cover Data, cohosted by the U. S. Geological Survey (USGS) and the U.S. Environmental Protection Agency (USEPA), February 25-27,1992 at the USGS National Center in Reston, Virginia. The Forum was conducted under the...
Increasing rates of atmospheric mercury deposition in midcontinental North America
Edward B. Swain, Daniel R. Engstrom, Mark E. Brigham, Thomas A. Henning, P.L. Brezonik
1992, Science (257) 784-787
Mercury contamination of remote lakes has been attributed to increasing deposition of atmospheric mercury, yet historic deposition rates and inputs from terrestrial sources are essentially unknown. Sediments of seven headwater lakes in Minnesota and Wisconsin were used to reconstruct regional modern and preindustrial deposition rates of mercury. Whole-basin mercury fluxes,...
Groundwater dolocretes from the Upper Triassic of the Paris Basin, France: A case study of an arid, continental diagenetic facies
C. Spotl, V.P. Wright
1992, Sedimentology (39) 1119-1136
Thick dolomite-cemented horizons (dolocretes) occur within a fluvial sandstone-mudstone sequence of Late Triassic age in the western part of the Paris Basin, France. Two types of dolomites can be distinguished: (a) nodular dolomitic beds less than a few metres thick, which formed within mottled overbank siltstones and mudstones; and (b)...
Dolomitization of Quaternary reef limestones, Aitutaki, Cook Islands
James R. Hein, S.C. Gray, B. M. Richmond, L. D. White
1992, Sedimentology (39) 645-661
Six holes were drilled to depths of 30–69 m in the shallow lagoon of Aitutaki in the southern Cook Islands. One hole encountered pervasively dolomitized reef limestones at 36 m subbottom depth, which extended to the base of the drilled section at 69·3 m. This hole was drilled near the...
Theoretical and measured aeolian sand transport on a barrier island, Louisiana, USA
John R. Dingman, S.A. Hsu, Thomas E. Reiss
1992, Sedimentology (39) 1031-1043
Over the past 100 years, the Isles Dernieres, a low lying barrier island chain along the coast of central Louisiana, Usa, has undergone more than 1 km of northward beach face retreat with the loss of 70% of its surface area. The erosion results from a long term relative...
Controls on the accumulation of coal and on the development of anastomosed fluvial systems in the Cretaceous Dakota Formation of southern Utah
M.A. Kirschbaum, P.J. McCabe
1992, Sedimentology (39) 581-598
Alluvial strata of the Cretaceous Dakota Formation of southern Utah are part of a transgressive systems tract associated with a foreland basin developed adjacent to the Sevier orogenic belt. These strata contain valley fill deposits, anastomosed channel systems and widespread coals. The coals constitute a relatively minor part of the...
Allozyme evidence for crane systematics and polymorphisms within populations of Sandhill, Sarus, Siberian and whooping cranes
H.C. Dessauer, G.F. Gee, J.S. Rogers
1992, Molecular Phylogenetics and Evolution (1) 279-288
Electrophoretic analysis of proteins yielded evidence on the relationships of species of cranes and on genetic diversity within populations of some species. Diversity within the Greater Sandhill crane and a Florida population of the Florida Sandhill crane was similar to that of most other vertebrates, but diversity was low in...
The extent of temporal smearing in surface-temperature histories derived from borehole temperature measurements
G.D. Clow
1992, Palaeogeography, Palaeoclimatology, Palaeoecology (98) 81-86
The ability of borehole temperature data to resolve past climatic events is investigated using Backus-Gilbert inversion methods. Two experimental approaches are considered: (1) the data consist of a single borehole temperature profile, and (2) the data consist of climatically-induced temperature transients measured within a borehole during a monitoring experiment. The...
Pre-Elsonian mafic magmatism in the Nain Igneous Complex, Labrador: The bridges layered intrusion
L.D. Ashwal, R.A. Wiebe, J. L. Wooden, M.J. Whitehouse, Diane Snyder
1992, Precambrian Research (56) 73-87
Decades of work on the pristine, unmetamorphosed, and well exposed anorthositic, mafic and granitic rocks of the Nain igneous complex, Labrador, have led to the conclusion that all plutonic rocks in that area were emplaced in a short time intercal at about 1300 ± 10 Ma). We report here new...
Geochronology and subsurface stratigraphy of Pukapuka and Rakahanga atolls, Cook Islands: Late Quaternary reef growth and sea level history
S.C. Gray, J.R. Hein, R. Hausmann, U. Radtke
1992, Palaeogeography, Palaeoclimatology, Palaeoecology (91) 377-394
Eustatic sea-level cycles superposed on thermal subsidence of an atoll produce layers of high sea-level reefs separated by erosional unconformities. Coral samples from these reefs from cores drilled to 50 m beneath the lagoons of Pukapuka and Rakahanga atolls, northern Cook Islands give electron spin resonance (ESR) and U-series ages...
Geochemical and detrital mode evidence for two sources of Early Proterozoic sedimentary rocks from the Tonto Basin Supergroup, central Arizona
K.C. Condie, P.D. Noll Jr., C. M. Conway
1992, Sedimentary Geology (77) 51-76
The Tonto Basin Supergroup includes up to 6.5 km of Early Proterozoic sedimentary and volcanic rocks that were deposited in a relatively short period of time at about 1.7 Ga in central Arizona. Moderate correlations of rare earth elements (REE) and Ti with Al2O3 and REE distributions in detrital sediments of...
Transgressive channel filling in the Breathitt Formation (Upper Carboniferous), Eastern Kentucky Coal Field, USA
S.F. Greb, D.R. Chesnut Jr.
1992, Sedimentary Geology (75) 209-221
Carbonaceous shales of brackish or marine origin in the Breathitt Formation may exhibit sharp bases with local channel-form scours. Minor channels at the bases of these shales exhibit three general types of fill: (1) shale, (2) bioturbated, heterolithic strata, and (3) coal overlain by shale or bioturbated, heterolithic strata. Most...
Palaeoecology and sedimentology of the dysaerobic Bedford fauna (late Devonian), Ohio and Kentucky (USA)
J.C. Pashin, F.R. Ettensohn
1992, Palaeogeography, Palaeoclimatology, Palaeoecology (91) 21-34
Oxygen-deficient biofacies models rely on lithologic and paleontologic attributes to identify distinctive biofacies interpreted to reflect levels of oxygenation in anaerobic, dysaerobic, and aerobic parts of a stratified water column. This study of the Bedford fauna from the Bedford Shale of Ohio and Kentucky and from adjacent black-shale units reports...