Avian cholera in the central and Mississippi flyways 1979-80
Christopher J. Brand
1984, Journal of Wildlife Management (48) 399-406
Waterfowl mortality from avian cholera during July 1979-May 1980 was widespread in the Central and Mississippi flyways, occurring in a wide variety of species and locations from nesting grounds of snow geese (Chen caerulescens) on Hudson Bay south to waterfowl wintering areas on the Texas coast and playa lakes region....
Refuge management analyses: levee alternatives at Clarence Cannon National Wildlife Refuge
Gregor T. Auble, David B. Hamilton, James E. Roelle
1984, Report
This report documents the results of a workshop that examined levee alternatives at Clarence Cannon National Wildlife Refuge. This refuge is located along the Mississippi River, approximately 50 miles north of St. Louis. It was purchased primarily for waterfowl maintenance. A levee providing flood protection from the Mississippi River has...
Cenozoic plate motions and the volcano-tectonic evolution of western Oregon and Washington
Ray E. Wells, David C. Engebretson, P. D. Snavely Jr., R. S. Coe
1984, Tectonics (3) 275-294
A refined northeast Pacific plate-motion model provides a framework for analysis of the Tertiary volcanic and tectonic history of western Oregon and Washington. We examine three possible models for the origin of the allochthonous Paleocene and Eocene oceanic basalt basement of the Coast Range: (1) accretion to the continent of...
Estimating the effect of hunting on annual survival rates of adult mallards
Kenneth P. Burnham, Gary C. White, David R. Anderson
1984, Journal of Wildlife Management (48) 350-361
Management programs for waterfowl populations include rationale for, and establishment of, hunting regulations. These programs rest partially on the results of scientific studies on the effect of harvest rates on annual survival rates. The evidence of this relationship has changed markedly since the mid-1970's, and it is not...
Determining fat digestibility in trout using a metabolic chamber
R.W. Ellis, R. R. Smith
1984, Progressive Fish-Culturist (46) 116-119
Fat digestibilities were determined in rainbow trout utilizing a metabolism chamber. Separate and quantitative fecal extracts were freeze dried and total lipids were extracted. Lipid digestibilities were comparable to those obtained by other methods (85‐91%). This method avoids problems due to leaching and the variable of accelerated passage through the...
Rock avalanches caused by earthquakes: Source characteristics
D. K. Keefer
1984, Science (223) 1288-1290
Study of a worldwide sample of historical earthquakes showed that slopes most susceptible to catastrophic rock avalanches were higher than 150 meters and steeper than 25 degrees. The slopes were undercut by fluvial or glacial erosion, were composed of intensely fractured rock, and exhibited at least one other indicator of...
Geologic framework of nonmarine cretaceous-tertiary boundary sites, Raton Basin, New Mexico and Colorado
C. L. Pillmore, R.H. Tschudy, C. J. Orth, J. S. Gilmore, J.D. Knight
1984, Science (223) 1180-1183
Indium concentrations are anomalously high at the palynological Cretaceous-Tertiary boundary in fluvial sedimentary rocks of the lower part of the Raton Formation at several localities in the Raton Basin of New Mexico and Colorado. The iridium anomaly is associated with a thin bed of kaolinitic claystone in a discontinuous carbonaceous...
Recent studies indicate that major structures in northeastern Nevada and the Golconda thrust in north-central Nevada are of Jurassic or Cretaceous age
Keith B. Ketner
1984, Geology (12) 483-486
Geologic mapping recently completed in four areas of northeastern Nevada indicates that major folds and thrusts are of post-Early Triassic age and probably are Jurassic or Cretaceous. Previously published data for northeastern Nevada lead to, or permit, the same conclusion. Basinal deposits of Early Triassic age in the northern Adobe...
Zinc- and Y-group-bearing senaite from St Peters Dome, and new data on senaite from Dattas, Minas Gerais, Brazil
Eugene E. Foord, William N. Sharp, J.W. Adams
1984, Mineralogical Magazine (48) 97-106
A Zn- and Y-group-bearing senaite, formulated as AM21O38 (Pb0.63Na0.46Ba0.11)Σ1.20(Ti14.64Zn1.74Y‒group REE0.70Mn0.38Nb0.20Sn0.03Zr0.03Th0.02)Σ20.9O38, a member of the crichtonite group, is a newly characterized phase associated with murataite at the St Peters Dome...
Correlation of the middle eocene Kellogg Shale of northern California
John A. Barron, David Bukry, Richard Z. Poore
1984, Micropaleontology (30) 138-170
The Kellogg Shale of northern California has traditionally been considered to be late Eocene in age on the basis of benthic foraminifer, radiolarian, and diatom correlations. The 30-m-thick Kellogg section exposed west of Byron, California, however, contains middle Eocene planktonic foraminifers (Zone P12), coccoliths (Subzones CP13c and CP14a), silicoflagellates (Dictyocha...
Neogene silicoflagellates from Deep Sea Drilling Project Site 543, western tropical Atlantic Ocean
David Bukry
1984, Initial Reports of the D.S.D.P. (78A-78B) 463-468
The upper lower Miocene silicoflagellate assemblage in Core 19 from DSDP Hole 543 in the western Atlantic Ocean contains the greatest concentration (41%) of deflandroid Dictyochapulchella yet observed. The deflandroid morphology in Dictyocha persisted through the Eocene and Oligocene at middle and high latitude, but virtually disappeared in the late...
Cenozoic silicoflagellates from Rockall Plateau, Deep Sea Drilling Project Leg 81
David Bukry
1984, Initial Reports of the D.S.D.P. (81) 547-563
Eocene to Pliocene silicoflagellates from the Rockall Plateau are sparse to moderately abundant and include assem blages at the upper and lower boundaries of the Miocene Series. Relative paleotemperature values for silicoflagellates from the upper Miocene and lower Pliocene at DSDP Hole 552A based on quantitative data are cooler than...
Paleogene paleoceanography of the Arctic Ocean is constrained by the middle or late Eocene age of USGS Core Fl-422: Evidence from silicoflagellates
David Bukry
1984, Geology (12) 199-201
Arctic Ocean Core Fl-422 has been of central importance in Arctic tectonics and paleoceanography because it provides the sole evidence for early Cenozoic marine conditions in the Arctic. The presence of several Eocene and Eocene or Oligocene guide species of silicoflagellates in samples from this core shows that it is...
A seismic refraction survey of the Imperial Valley Region, California
Gary S. Fuis, Walter D. Mooney, J. H. Healy, G. A. McMechan, W. J. Lutter
1984, Journal of Geophysical Research B: Solid Earth (89) 1165-1189
The U.S. Geological Survey conducted an extensive seismic refraction survey in the Imperial Valley region of California in 1979. The Imperial Valley is located in the Salton Trough, an active rift between the Pacific and North American plates. Forty shots fired at seven shot points were recorded...
Dynamics of added nitrate and phosphate compared in a northern California woodland stream
Michael J. Sebetich, Vance C. Kennedy, S. Marc Zand, Ronald J. Avanzino, Gary W. Zellweger
1984, Journal of the American Water Resources Association (20) 93-101
Injections of NO3 and PO4 were made during September 1975 into Little Lost Man Creek, a small pristine stream in Redwood National Park, California. Chloride, a conservative constituent, was added in a known ratio to the nutrients. Nutrient loss at a downstream point was calculated using concentration of added Cl as a...
Tests of compensatory vs. additive hypotheses of mortality in mallards
Kenneth P. Burnham, David R. Anderson
1984, Ecology (65) 105-112
Band recovery data from over 410 000 adult Mallards (Anas platyrhynchos) banded in North America between 1950 and 1979 were analyzed to examine the effect of exploitation on annual survival rate. Two extreme hypotheses were defined: completely compensatory, and totally additive, and an explicit mathematical model was presented to...
Evaluation of the potential hazard to barn owls of talon (brodifacoum bait) used to control rats and house mice
Paul L. Hegdal, Raymond W. Blaskiewicz
1984, Environmental Toxicology and Chemistry (3) 167-179
During 1980, a radiotelemetry study on barn owls (Tyto alba) was conducted to evaluate the secondary hazards of the anticoagulant rodenticide TALON® (containing 0.005% brodifacoum) when it was used for controlling rats (Rattus spp.) and house mice (Mus musculus) on farms. Thirty‐five active nests were located in about 1,100 km2 (430 mi2)...
Late Leonardian plants from West Texas: The youngest Paleozoic plant megafossils in North America
S.H. Mamay, J.M. Miller, D.M. Rohr
1984, Science (223) 279-281
Abundant Permian plant megafossils were discovered in the Del Norte Mountains of Brewster County, Trans-Pecos Texas. The flora is dominated by a new and distinctive type of gigantopteroid leaves. Marine invertebrates are closely associated, and this admixture of continental and marine fossils indicates a deltaic depositional setting, probably on the...
Ultrathin lava layers exposed near San Luis Obispo Bay, California
James G. Moore, D.W. Charlton
1984, Geology (12) 542-545
Sequences of extraordinarily thin (1–5 cm thick) lava layers, resembling individual lava flows, are interbedded with Jurassic and Cretaceous pillowed lava flows near San Luis Obispo Bay on the California coast. Such layers are formed inside submarine pillowed lava pipes or flow lobes. As the lava surface in a pillow...
Effects of compression direction on the plasticity and rheology of hydrolytically weakened synthetic quartz crystals at atmospheric pressure
Mark F. Linker, Stephen H. Kirby, A. Ord, J.M. Christie
1984, Journal of Geophysical Research B: Solid Earth (89) 4241-4255
A hydrothermally grown synthetic quartz crystal with 370±60 ppm hydroxyl impurity was cut into right rectangular prisms in eight crystallographic orientations. We compressed the prisms under constant axial force corresponding to a uniaxial stress of 140.0±0.5 MPa, and temperatures of 510° and 750°C. All but one of the samples sustained...
Geologic evolution, sedimentation, and paleoenvironments of the Angola Basin and adjacent Walvis Ridge: Synthesis of results of Deep Sea Drilling Project Leg 75
Walter E. Dean, W.W. Hay, Jean-Claude Sibuet
1984, Initial Reports of the D.S.D.P. (75) 509-544
The section recovered at Site 530 (Holes 53OA and 530B) consists of eight sedimentary units and one basalt unit. The composition of the basalt recovered in Hole 53OA is distinct from typical mid-ocean ridge basalts (MORBs) but is similar to that of Hawaiian tholeiites and basalt from the central part...
Origin and geochemistry of Cretaceous deep-sea black shales and multicolored claystones, with emphasis on Deep Sea Drilling Project Site 530, southern Angola Basin
Walter E. Dean, M.A. Arthur, D.A.V. Stow
1984, Initial Reports of the D.S.D.P. (75) 819-844
Deep-water sedimentary sequences of mid-Cretaceous age, rich in organic carbon, have been recovered at many DSDP sites in the Atlantic Ocean. Most of these sequences have a marked cyclicity in amount of organic carbon resulting in interbedded multicolored shale, marlstone, and (or) limestone that have cycle periods of 20,000 to...
Carbonate and organic-carbon cycles and the history of upwelling at Deep Sea Drilling Project Site 532, Walvis Ridge, South Atlantic Ocean
J. Gardner, Walter E. Dean, C.R. Wilson
1984, Initial Reports of the D.S.D.P. (75) 905-921
Detailed carbonate and organic-carbon stratigraphies were constructed from samples collected every 20 cm in a 250-m hydraulic piston core recovered at DSDP Site 532 on Walvis Ridge. This sampling interval represents about one sample every 5000 yr., based on sediment accumulation rates calculated from nannofossil biostratigraphic zones. All samples were...
Shimada Seamount: An example of recent mid-plate volcanism
J. V. Gardner, Walter E. Dean, Richard J. Blakely
1984, GSA Bulletin (95) 855-862
Shimada Seamount is an isolated volcanic feature located between the Clipperton and Clarion Fracture Zones ∼1,150 km west of the East Pacific Rise and ∼600 km west of the inactive spreading center represented by the Mathematician Seamounts. It rises ∼3,900 m above the surrounding sea floor to within 50 m...
Models for the deposition of Mesozoic-Cenozoic fine-grained organic-carbon-rich sediment in the deep sea
M.A. Arthur, Walter E. Dean, D.A.V. Stow
1984, Geological Society of London Special Publications (15) 527-560
The widespread occurrence of organic-carbon-rich strata (‘black shales’) in certain portions of Jurassic, Cretaceous and Cenozoic sequences has been well-documented from Deep Sea Drilling Project sites in the Atlantic and Pacific Oceans and from sequences, now exposed on land, originally deposited in the Tethyan ocean. These ancient black shales...
