Wildlife in some areas of New Mexico and Texas accumulate elevated DDE residues, 1983
Donald H. White, Alexander J. Krynitsky
1986, Archives of Environmental Contamination and Toxicology (15) 149-157
Over the last decade, data gathered by the U.S. Fish & Wildlife Service's National Contaminant Biomonitoring Program have identified an area of elevated DDE contamination in portions of New Mexico and Texas. Extensive wildlife sampling in 1983 confirmed that DDE, the major metabolite of the insecticide DDT, was present at...
Bird predation on cutworms (Lepidoptera: Noctuidae) in wheat fields and chlorpyrifos effects on brain cholinesterase activity
L. C. McEwen, Lawrence R. DeWeese, P. Schladweiler
1986, Environmental Entomology (15) 147-151
Horned larks, Eremophila alpestris (L.), and McCown's longspurs, Calcarius mccownii (Lawrence), were collected at intervals from two winter wheat fields in Montana after aerial application of chlorpyrifos to control cutworms. Both bird species had a high (95–100%) incidence of Lepidoptera, mostly pale western cutworms, Agrotis orthogonia Morrison, in their stomachs at 3 days postspray. Incidence of...
Identification of solute loading sources to a surface stream
R. L. Rittmaster, D. K. Mueller
1986, Journal of the American Water Resources Association (22) 81-89
A study was performed to identify sources of solute loading to the Dirty Devil River and its major tributaries, in southeastern Utah. A primary goal was to determine the contribution of gypsum dissolution to total dissolved solids concentration, and its potential increase in the future if salinity...
Wetland ecosystems studies from a hydrologic perspective
James W. LaBaugh
1986, Journal of the American Water Resources Association (22) 1-10
Selected studies from the literature were reviewed to determine the extent of knowledge about the relationship between hydrology and wetland ecosystem studies. Wetland studies of chemical input-output relationships have been the most dependent on hydrologic data of all wetland investigations; yet, very few of these studies have attempted to measure...
Application of continuous seismic reflection methods to hydrologic studies
F.P. Haeni
1986, Groundwater (24) 23-31
Oil and gas exploration and engineering studies in water‐covered areas routinely use continuous seismic profiling techniques to obtain subsurface geologic information. Such profiling also can be used effectively in hydrologic studies to define the geologic framework of aquifer systems, to locate hydrologic boundaries, and in some places, to interpret the...
Stratigraphy and correlation of the glacial deposits on the Montana Plains
David S. Fullerton, Roger B. Colton
1986, Quaternary Science Reviews (5) 69-82
Till units representing at least three pre-Illinoian continental glaciations, at least one Illinoian glaciation, and a late Wisconsin glaciation have been identified on the Montana Plains. Early Wisconsin or middle Wisconsin till units have not been identified. The southernmost limit of late Wisconsin glaciation is in Montana, more than 170...
Introduction to quaternary glaciations in the United States of America
Gerald M. Richmond, David S. Fullerton
1986, Quaternary Science Reviews (5) 3-10
No abstract available....
World slope map
James G. Moore, R. K. Mark
1986, Eos, Transactions, American Geophysical Union (67) 1353-1362
A colored slope map (scale 1:80,000,000) was generated from digital land and sea floor elevations at 5‐min spacings from data tapes from the National Geophysical Data Center. Slope analysis is facilitated by examining the average slope in 250‐m altitude‐depth intervals both globally and in each of eight tectonic plates. The...
Late Neogene and Quaternary coarse-fraction and carbonate stratigraphies for Site 586 on Ontong-Java Plateau and Site 591 on Lord Howe Rise
J. V. Gardner, Walter E. Dean, Lynne Bisagno, Eileen Hemphill-Haley
1986, Initial Reports of the D.S.D.P. (90) 1020-1124
Carbonate oozes recovered by hydraulic piston coring at DSDP Site 586 on Ontong-Java Plateau and Site 591 on Lord Howe Rise have carbonate contents that are consistently higher than 90% with only minor variations. Consequently, paleoceanographic signals were not recorded in detail in the carbonate contents. However, mass accumulation rates...
Rhythmic bedding in Upper Cretaceous pelagic carbonate sequences: Varying sedimentary response to climatic forcing
M.A. Arthur, D.J. Bottjer, Walter E. Dean, A.G. Fischer, D.E. Hattin, E.G. Kauffman, L.M. Pratt
1986, Geology (14) 153-156
Rhythmic bedding is a prominent feature of North American and European Upper Cretaceous pelagic carbonate sequences deposited in epicontinental and continental-edge settings. Such bedding rhythms can result from variations in carbonate productivity, terrigenous dilution, redox conditions, or bottom currents. Each type of bedding cycle is expressed differently in the stratigraphic...
Rhythmic bedding produced in Cretaceous pelagic carbonate environments: Sensitive recorders of climatic cycles
D.J. Bottjer, M.A. Arthur, Walter E. Dean, D.E. Hattin, Charles Savrda
1986, Paleoceanography (1) 467-481
Various types of rhythmic bedding are prominent features of Cretaceous pelagic carbonates. These bedding rhythms are the primary depositional result of variations in carbonate productivity, terrigenous dilution, redox conditions and/or the energy of bottom currents. Each bedding cycle type is different in its expression in the stratigraphic record but ultimately...
Milankovitch cycles in Neocene deep‐sea sediment
Walter E. Dean, J. V. Gardner
1986, Paleoceanography (1) 539-553
Pelagic carbonate sediments from the world ocean basins commonly show cyclic variations in amount and/or degree of preservation of biogenic calcite, with periodicities of several tens to several hundreds of thousands of years. The direct causes of these cycles are fluctuations in noncarbonate dilution, carbonate production, carbonate dissolution, and/or current...
Geology of the Harrisonburg and Bridgewater quadrangles, Virginia
Thomas M. Gathright II, Peter S. Frischmann
1986, Book, Virginia Division of Mineral Resources Publication
The Harrisonburg and Bridgewater quadrangles comprise an area of approximately 117 square miles in Rockingham County in northwestern Virginia.This area is in the western part of the Shenandoah Valley, a portion of the Valley and Ridge physiographic province, and contains parts of three major geologic structures-the Staunton and North Mountain...
Water-quality data for the ground-water network in eastern Broward County, Florida, 1983-84
Bradley G. Waller, Frank L. Cannon
1986, Open-File Report 86-313
During 1983-84, ground water from 63 wells located at 31 sites throughout, eastern Broward County, Florida, was sampled and analyzed to determine baseline water-quality conditions. The physical and chemical parameters analyzed included field measurements (pH and temperature), physical characteristics (color, turbidity, and specific conductance), major inorganic ions, nutrients (nitrogen, phosphorus,...
The Coordinate
U.S. Eastern Mapping Center
1986, Report
No abstract available....
Distribution and habitat of Nitellopsis obtuse (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...
Demographic structure of chaparral under extended fire-free conditions
Jon E. Keeley, A. Brooks, T. Bird, S. Cory, H. Parker, E. Usinger
J.J. DeVries, editor(s)
1986, Book, Proceedings of the Chaparral Ecosystems Research Conference
No abstract available....
Mineral resources of wilderness study areas: east-central Nevada and part of adjacent Beaver County, Utah
1986, Bulletin 1728
No abstract available....
Multispectral digital image mapping of Antarctic ice features
Charles Swithinbank, Baerbel K. Lucchitta
1986, Annals of Glaciology (8) 159-163
Landsat multispectral images of the Antarctic ice sheet have been digitally enhanced by the US Geological Survey to show ice surface features not seen in earlier photographic products of the same scenes. Now for the first time it is worthwhile to prepare image maps at scales of up to 1:250...
Mount St. Helens: American Geomorphological Field Group field trip guidebook and abstracts
Richard M. Iverson, Holly A. Martinson, editor(s)
1986, Book
No abstract available....
Iowa joins in monitoring acid rain
R.C. Buchmiller
1986, Iowa Conservationist (45)
No abstract available....
Demographic patterns of the shrub Ceanothus megacarpus in an old stand of chaparral in the Santa Monica Mountains
T. M. Montygierd-Loyba, Jon E. Keeley
J.J. DeVries, editor(s)
1986, Book, Proceedings of the Chaparral Ecosystems Research Conference
Wildfires have had a major influence on the structural and functional adaptations that have evolved in Mediterranean-type ecosystems. Some chaparral shrubs sprout after fires while others produce serotinous cones or seeds refractory to germination until they are cued by a fire. Ceanothus megacarpus is a sclerophylous shrub commonly...
Unsteady, nonuniform landslide motion: 1. Theoretical dynamics and the steady datum state
Richard M. Iverson
1986, Journal of Geology (94) 1-15
Unsteady, nonuniform motion of persistently active landslides is a process of widespread importance. A general, three-dimensional theory aimed at elucidating this process is developed from physical principles and field measurements of landslide behavior. The theory employs a versatile constitutive model that represents...
1986 wetland plant list: Delaware
P.B. Reed Jr.
1986, Report
No abstract available....
1986 wetland plant list: Alabama
P.B. Reed Jr.
1986, Report
No abstract available....
