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...
Lead retention in zircons
K.R. Ludwig, R. E. Zartman, S. S. Goldich
1984, Science (223) 835-835
No abstract available....
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)...
Potential of cobalt and other metals in ferromanganese crusts on seamounts of the Central Pacific Basin
P.E. Halbach, Frank T. Manheim
1984, Marine Mining (4) 319-336
No abstract available....
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...
Accessioning and cataloguing
D.E. Wilson
1984, Book, Management of mammal collection in tropical environment: proceedings of the Workshop on Management of Mammal Collection in Tropical Environment
No abstract available....
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...
Introduction and digest to the Special Issue on Chemical Effects of Water on the Deformation and Strengths of Rocks
Stephen H. Kirby
1984, Journal of Geophysical Research B: Solid Earth (89) 3991-3995
The important role of pore pressure in promoting such brittle processes as cataclasis, hydraulic fracturing, large‐scale faulting, and earthquakes within the crust is widely accepted in geology and geophysics [, 1957; , 1959; , 1958; ., 1963; , 1968; ., 1968; ., 1976; , 1973, 1980; , 1981]. Provided that...
Experimental deformation of topaz crystals: Possible embrittlement by intracrystalline water
R. W. Lee, Stephen H. Kirby
1984, Journal of Geophysical Research B: Solid Earth (89) 4161-4166
Crystallographically oriented single‐crystal prisms of gem quality topaz (composition AlSiO (OH− F) where x = 0.04 ± 0.01) were deformed at a confining pressure of 1.50 GPa, a temperature of 800°C, and a strain rate of 2×10 s. Under nearly identical conditions, all crystals of anhydrous rock‐forming minerals that have...
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...
Middle Cretaceous black shales at Site 530 in the southeastern Angola Basin
D.A. Stow, Walter E. Dean
1984, Initial Reports of the D.S.D.P. (75) 809-817
The middle Cretaceous black shale interval at Site 530 is 170 m thick and late Albian to Coniacian in age. The organic-carbon-rich sediments occur as 260 separate beds (average 4 cm, maximum 60 cm thick) and make up less than 10% of the recovered section. Associated lithologies are greenish, grayish,...
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...
Between Mount St. Helens and the world: How the U.S. Geological Survey provided news-media information on the 1980 volcanic eruptions
Peter D. Rowley, M. H. Hait Jr., Donald R. Finley, Donovan B. Kelly, Susan L. Russell-Robinson, Jane M. Buchanan-Banks, Katherine V. Cashman, Edna G. King
1984, Circular 921
The eruptions of Mount St. Helens volcano, Wash., constituted one of the major national and international news stories of 1980 and involved the U.S. Geological Survey in more news coverage than any other event in its history. Much of the information about the volcano came from monitoring and research by...
Third report to the fish farmers : the status of warmwater fish farming and progress in fish farming research
Huner Jay V. Dupree H. K.
1984, Book, Third Report to the Fish Farmers: The Status of Warmwater Fish Farming Research
No abstract available....
Flow-through bioassay for measuring bioaccumulation of toxic substances from sediment
Michael J. Mac, Carol C. Edsall, Robert J. Hesselberg, Richard E. Sayers Jr.
1984, Report
Over 10 million cubic meters of sediment are dredged annually from Great Lakes waterways. Because much of this material is taken from harbors, connecting channels, and other nearshore areas that often are contaminated with toxic substances, the sediments proposed for dredging need to be evaluated for the presence of bioavailable...
