A plate flexure approximation to postseismic and interseismic deformation
James C. Savage, Guohua Gu
1985, Journal of Geophysical Research B: Solid Earth (90) 8570-8580
The rather large postseismic deformation that is associated with two‐dimensional dip‐slip faulting in the lithosphere is related to the bending of a free plate generated by dip‐slip faulting. In the absence of gravity, asthenosphere relaxation eventually permits the faulted lithosphere to assume the dihedral configuration of a faulted free plate....
Carbon, oxygen and hydrogen isotope abundances inStylites reflect its unique physiology
Leonel d.S.L Sternberg, Michael J. DeNiro, D. McJunkin, R. Berger, Jon E. Keeley
1985, Oecologia (67) 598-600
Natural abundances of oxygen-18, carbon-14, carbon-13 and deuterium were measured inStylites andicola, a terrestrial vascular plant lacking stomates, and two terrestrial plant species having stomates that grew nearby. No substantial differences in oxygen-18 and carbon-13 abundances were observed among the three species. The deuterium concentration inStylites was much higher than in...
An evaluation of uranium-series dating of fossil echinoids from southern California Pleistocene marine terraces
Daniel R. Muhs, George L. Kennedy
1985, Marine Geology (69) 187-193
Fossil sea urchins (Strongylocentrotus) from Pleistocene marine terraces on the southern California Channel Islands have been dated by the uranium-series method in order to test the suitability of echinoids for dating marine terraces. Results indicate that urchin plates and spines do not behave as closed systems with respect to both...
Iowa: a summary of water-resources activities of the United States Department of the Interior Geological Survey
R.A. Karsten
1985, Report
No abstract available....
Determining age and sex of American coots
William R. Eddleman, Fritz L. Knopf
1985, Journal of Field Ornithology (56) 41-55
Reliable techniques for age and sex determination of migrating and wintering American Coots (Fulica americana) have not been available. Breeding coots can be ages through age 3 by tarsal color (birds 4 years and older were placed in a 4+ age class) (Crawford 1978), and males and females have...
Plant water status relationships among major floodplain sites of the Flathead River, Montana
L.C. Lee, T.M. Hinckley, M. L. Scott
1985, Wetlands (5) 15-34
Water status measurements of dominant species from major floodplain plant community types of the North Fork Flathead River, Montana were used to test the accuracy of site moisture gradient relationships postulated from floristic ordinations and site water balance estimates. Analysis of variance tests showed significant differences among the average predawn...
Influence of various land uses on windbreak selection by nesting Mississippi kites
Diane Love, Joseph A. Grzybowski, Fritz L. Knopf
1985, The Wilson Bulletin (97) 561-565
Contemporary land-use practices have dramatically altered breeding habitats of birds of prey (Cramp, pp. 9-11 in World Conf. Birds of Prey, R. D. Chancellor, ed., ICPB, London, England, 1977). Some land uses appear to influence strongly both the nesting activity (White, Trans. North Am. Wild. Nat. Resour. Conf. 39:301-312,...
Interspecific relationships between American coots and waterfowl during fall migration
William R. Eddleman, Craig T. Patterson, Fritz L. Knopf
1985, The Wilson Bulletin (97) 463-472
Interactions between American Coots (Fulica americana) and water-fowl during the breeding season are well-documented (Ryder 1959, Nudds 1981). Ducks and coots use similar nesting, feeding, brooding, and loafing sites during the breeding season (Munro 1939, Sooter 1945, Ryder 1959). Coots create potential nest sites, repulse predators, provide predation...
A relational approach to vector data structure conversion
Jan W. van Roessel, Eugene A. Fosnight
1985, Conference Paper, Auto-Carto VII: Proceedings of the digital representations of spatial knowledge
The proliferation of geographic information systems and digital data bases is creating a need for efficient methods to convert data from one spatial data structure to another. One approach is to create ad hoc interfaces, with a potential of N(N-1) interfaces for N data structures. Using an intermediate data structure,...
Water resources activities of the U.S. Geological Survey
Dallas L. Peck
1985, Journal of the American Water Resources Association (21) 901-907
No abstract available. ...
Simulation of ground-water flow in the Prairie du Chien-Jordan aquifer and relation to ground-water contamination by coal-tar derivatives, St. Louis Park, Minnesota
J. R. Stark, M. F. Hult
1985, Conference Paper
No abstract available....
Devonian eustatic fluctuations in Euramerica
J.G. Johnson, Gilbert Klapper, Charles Sandberg
1985, GSA Bulletin (96) 567-587
The Devonian System of Euramerica contains at least 14 transgressive-regressive (T-R) cycles of eustatic origin. These are separated into three groups (or depophases) and from Carboniferous cycles by three prominent regressions. Twelve post-Lochkovian T-R cycles are recognized, and they commonly appear to result from abrupt deepening events followed by prolonged...
16th century European earthquakes described in some contemporary woodcuts
H. Deresiewicz
1985, Earthquake Information Bulletin (USGS) (17) 204-210
In the middle of the 15th century, shortly after Gutenberg’s invention of printing using individual lead type, the first illustrated broadsides (or broadsheets) began appearing in southern Germany. Usually printed on one side of a sheet of paper, they consisted of a woodcut illustration, sometimes colored, either by hand or...
Tsunamis – Scourge of the Pacific
Patricia Lockridge
1985, Earthquake Information Bulletin (USGS) (17) 211-217
Although tsunamis occur most often in the Pacific Ocean, they can be generated by major earthquakes in other areas. The most frequent cause of tsunamis…is crustal movement along a fault: a large mass of rock drops or rises and displaces the column of water above it. This column of water...
Earthquake potential of the Wasatch Fault in Utah
1985, Earthquake Information Bulletin (USGS) (17) 218-225
The majority of Utah’s population lives along the Wasatch fault, an active intraplate normal fault that extends for approximately 230 miles along the western front of the Wasatch Range. Investigations of earthquake recurrence on the Wasatch fault have revealed that segments of the fault have been the source of repeated...
Implications of silicic vent patterns for the presence of large crustal magma chambers
Charles R. Bacon
1985, Journal of Geophysical Research B: Solid Earth (90) 11243-11252
On the basis of the distribution of silicic vents, many volcanic fields can be grouped with (1) igneous systems that may be small and whose vent locations are controlled by regional tectonics, (2) those that include sizable crustal magma bodies which erupt at sites determined by their anomalous local stress...
Field determination of the three-dimensional hydraulic conductivity tensor of anisotropic media: 1. Theory
Paul A. Hsieh, Shlomo P. Neuman
1985, Water Resources Research (21) 1655-1665
A field method is proposed for determining the three-dimensional hydraulic conductivity tensor and specific storage of an anisotropic porous or fractured medium. The method, known as cross-hole testing (to distinguish it from conventional single-hole packer tests), consists of injecting fluid into (or withdrawing fluid from) packed-off intervals in a number...
Assessment of the instantaneous unit hydrograph derived from the theory of topologically random networks
M.R. Karlinger, B.M. Troutman
1985, Water Resources Research (21) 1693-1702
An instantaneous unit hydrograph (iuh) based on the theory of topologically random networks (topological iuh) is evaluated in terms of sets of basin characteristics and hydraulic parameters. Hydrographs were computed using two linear routing methods for each of two drainage basins in the southeastern United States and are the basis...
Origin of the Sudbury Complex by meteoritic impact: Neodymium isotopic evidence
B.E. Faggart Jr., A. R. Basu, Mitsunobu Tatsumoto
1985, Science (230) 436-439
Samarium-neodymium isotopic data on whole rocks and minerals of the Sudbury Complex in Canada gave an igneous crystallization age of 1840 ± 21 × 106 years. The initial epsilon neodymium values for 15 whole rocks are similar to those for average upper continental crust, falling on the crustal trend of neodymium...
Presence and effects of the dog louse Trichodectes canis (Mallophaga, Trichodectidae) on wolves and coyotes from Minnesota and Wisconsin
L. David Mech, Richard P. Thiel, S. H. Fritts, W. E. Berg
1985, American Midland Naturalist (114) 404-405
The dog louse was found on 19 wolves (Canis lupus) and six coyotes (C. latrans) from Minnesota and Wisconsin during the July-February, 1973 through 1983, period. No evidence was found that lice had any serious effect on wolf survival....
Interactions among temporary and permanent meiofauna: Observations on the feeding and behavior of selected taxa
Mary C. Watzin
1985, Biological Bulletin (169) 397-416
Meiofauna diets and behavioral patterns are relatively unknown despite the fact that in any system, predatory relationships and behavioral responses may play an important role in determining community structure. Therefore, observations on food preferences, feeding behavior, and encounter interactions of members of a meiofauna assemblage were made in the laboratory...
On the interpretation of satellite-derived gravity and magnetic data for studies of crustal geology and metallogenesis
David A. Hastings
1985, Conference Paper, Geopotential Research Mission (GRM): Proceedings of a conference
Satellite-derived global gravity and magnetic maps have been shown to be useful in large-scale studies of the Earth's crust, despite the relative infancy of such studies. Numerous authors have made spatial associations of gravity or magnetic anomalies with geological provinces. Gravimetric interpretations are often made in terms of isostasy, regional...
Periodic autoregressive-moving average (PARMA) modeling with applications to water resources
A. V. Vecchia
1985, Journal of the American Water Resources Association (21) 721-730
Results involving correlation properties and parameter estimation for autoregressive-moving average models with periodic parameters are presented. A multivariate representation of the PARMA model is used to derive parameter space restrictions and difference equations for the periodic autocorrelations. Close approximation to the likelihood function for Gaussian PARMA processes results in efficient...
Environmental contaminants in eastern Cooper's hawk eggs
Oliver H. Pattee, Mark R. Fuller, T. Earl Kaiser
1985, Journal of Wildlife Management (49) 1040-1044
No abstract available. ...
Detectability of step trends in the rate of atmospheric deposition of sulfate
R.M. Hirsch, E.J. Gilroy
1985, Journal of the American Water Resources Association (21) 773-784
A method is presented to assist policy makers in determining the combination of number of sampling stations and number of years of sampling necessary to state with a given probability that a step reduction in atmospheric deposition rates of a given magnitude has occurred at a pre-specified time. This pre-specified...
