Toxaphene residues in fish: Identification, quantification, and confirmation at part per billion levels
M. A. Ribick, George R. Dubay, Jimmie D. Petty, David L. Stalling, Christopher J. Schmitt
1982, Environmental Science & Technology (16) 310-318
No abstract available....
The Yellowstone-Snake River Plain seismic profiling experiment: Crustal structure of the Eastern Snake River Plain
L.W. Braile, R. B. Smith, J. Ansorge, M.R. Baker, M.A. Sparlin, C. Prodehl, M.M. Schilly, J. H. Healy, Mueller, K.H. Olsen
1982, Journal of Geophysical Research B: Solid Earth (87) 2597-2609
Seismic refraction profiles recorded along the eastern Snake River Plain (ESRP) in southeastern Idaho during the 1978 Yellowstone-Snake River Plain cooperative seismic profiling experiment are interpreted to infer the crustal velocity and attenuation (Q-1) structure of the ESRP. Travel-time and synthetic seismogram modeling of a 250 km reversed refraction profile...
Marine geologic studies of the inner continental shelf off Massachusetts
C. J. O’Hara, R. N. Oldale, O.C. Farquhar
1982, Conference Paper, Geotechnology in Massachusetts
No abstract available....
Geologic and geochronologic reconnaissance of the Turtle Mountains area, California: West border of the Whipple Mountains detachment terrane
Keith A. Howard, Paul Stone, M.A. Pernokas, R. F. Marvin
E.G. Frost, D.L. Martin, editor(s)
1982, Book chapter, Mesozoic-Cenozoic tectonic evolution of the Colorado River Region, California, Arizona, and Nevada
No abstract available....
Sensitivity of selected geomagnetic properties to truncation level of spherical harmonic expansions
E.R. Benton, Ronald H. Estes, R.A. Langel, L.A. Muth
1982, Geophysical Research Letters (9) 254-257
A two day selection of MAGSAT data is fit by spherical harmonic series truncated at increasing levels NF in the range 2<NF<14 to determine the extent to which the geomagnetic Gauss coefficients depend upon truncation level of the fit. The dependence is found to be concentrated in the range n<NF≲n+4...
Analysis of barium and strontium in sediments by dc plasma emission spectrometry
P. C. Bowker, F.T. Manheim
1982, Applied Spectroscopy (3) 378-382
The dc plasma arc is suited to analysis of barium and strontium in a wide range of sedimentary rock matrices, from sands, shales, and carbonates, to ferromanganese nodules. Samples containing 10 ppm to more than 3000 ppm barium and strontium were studied. Both alkali (3500 ppm lithium borate, from a...
The dynamic environment of the ocean floor
Kent A. Fanning, Frank T. Manheim, editor(s)
1982, Book
No abstract available...
Net-mortality of Common Murres and Atlantic Puffins in Newfoundland, 1951-81
John F. Piatt, David N. Nettleship, William Threlfall
David N. Nettleship, Gerald A. Sanger, Paul F. Springer, editor(s)
1982, Conference Paper, Marine birds: Their feeding ecology and commercial fisheries relationships
Band recoveries (N = 315) over 26 years (1951-77) and three surveys of seabird bycatch in inshore fishing nets (1972, 1980-81) indicate that there has been a substantial net-mortality of Atlantic Puffins (Fratercula arctica) and Common Murres (Uria aalge) in Newfoundland coastal waters for the past 2 decades. Offshore (e.g....
Uranium-lead isotopic ages from the Sierra Nevada Batholith, California
J. Chen
1982, Journal of Geophysical Research B: Solid Earth (87) 4761-4784
This study provides new information on the timing and distribution of Mesozoic magmatic events in the Sierra Nevada batholithic complex chiefly between 36° and 37°N. latitude. U-Pb ages have been determined for 133 zircon and 7 sphene separates from 82 samples of granitoid rocks. Granitoid rocks in this area range...
Representation of multiaquifer well effects in three-dimensional ground-water flow simulation
Gordon D. Bennett, Angelo L. Kontis, Steven P. Larson
1982, Groundwater (20) 334-341
The presence of multiaquifer or multilayer wells changes the nature of the equations which must be solved in a three-dimensional ground-water flow simulation and, in effect, alters the stencil of computation. A method has been devised which takes this change into consideration by allowing simulation of the hydraulic effects of...
The occurrence of the Complexiopollis-Atlantopollis zone (Palynomorphs) in the Eagle Ford Group (Upper Cretaceous) of Texas
Raymond A. Christopher
1982, Journal of Paleontology (56) 525-541
The Lower and lower Upper Cretaceous palynological zones defined in the Atlantic Coastal Plain Province and which occur in the eastern Gulf Coastal Plain Province are characterized by a paucity of marine invertebrate fossils. As a result, correlation of these zones with European and provincial stages, as well as with...
Terranes and suture zones in east central Alaska
M. Churkin Jr., H.L. Foster, R. M. Chapman, F. R. Weber
1982, Journal of Geophysical Research B: Solid Earth (87) 3718-3730
East central Alaska, with its 17 terranes, forms a part of the mosaic of allochthonous terranes that join the North American and Siberian plates. These terranes range from continental and continental margin, such as the Tatonduk with its thick well-bedded succession of marine shelf rocks, to seamount, arc, and ocean...
A 40-foot static cone penetrometer
R.M. Beard, H.J. Lee
1982, Conference Paper
The Navy needs a lightweight device for testing seafloor soils to sub bottom depths of 12 meters in water depths to 60 meters. To meet this need a quasistatic cone penetration device that uses water jetting to reduce friction on the cone rod has been developed. This device is called...
The use of vertical seismic profiles in seismic investigations of the earth
Alfred H. Balch, Myung W. Lee, J. J. Miller, Robert T. Ryder
1982, Geophysics (47) 906-918
During the past 8 years, the U.S. Geological Survey has conducted an extensive investigation on the use of vertical seismic profiles (VSP) in a variety of seismic exploration applications. Seismic sources used were surface air guns, vibrators, explosives, marine air guns, and downhole air guns. Source offsets have ranged from...
Time-predictable bimodal volcanism in the Coso Range, California
Charles R. Bacon
1982, Geology (10) 65-69
The bimodal Pleistocene part of the Coso volcanic field has erupted rhyolite and basalt at constant long-term rates during the past ∼0.5 m.y. Both basalt and high-silica rhyolite were erupted in several independent, geologically brief episodes. The interval between eruptions of rhyolite was proportional to the volume of the preceding...
Diatom biostratigraphy and paleoecology of the type section of the Luisian Stage, central California
Jack G. Baldauf, John A. Barron
1982, Micropaleontology (28) 84
Diatoms from the type section of the Luisian Stage in central California correlate with the lowermost part of the Denticulopsis lauta Zone through the lower part of subzone "a" of the Denticulopsis hustedtii-D. lauta Zone and are early Middle Miocene in age (about 6.0 to 14.0 Ma), Rocks assigned to...
Source parameters of the 1980 Mammoth Lakes, California, earthquake sequence
Ralph J. Archuleta, Edward Cranswick, Charles Mueller, Paul Spudich
1982, Journal of Geophysical Research B: Solid Earth (87) 4595-4607
From the more than 1500 Mammoth Lakes earthquakes recorded on three-component digital seismographs (Spudich et al., 1981), 150 were used in an analysis of the locations, mechanism, and source parameters. A composite fault plane solution of nine earthquakes 3.9 ≤ M ≤ 5.1 defines a right-lateral strike slip mechanism on...
Recent trends in the west Greenland salmon fishery, and implications for Thick-billed Murres
John F. Piatt, David G. Reddin
1982, Conference Paper, Marine birds: Their feeding ecology and commercial fisheries relationships
In the late 1960s and early 1970s, a high net-mortality of seabirds, particularly Thick-billed Murres (Uria lomvia), was associated with the west Greenland salmon fishery. Since 1972, the domestic fishery has been controlled by quotas and fishery opening dates and non-Greenlandic offshore drift-net fishery was phased out in 1975. These...
Paleoenvironment and age of kaolin deposits in the Andersonville district, Georgia
Harland E. Cofer, Norman O. Frederiksen
1982, Conference Paper, Proceedings: Second Symposium on the Geology of the Southeastern Coastal Plain
The kaolin deposits of the Andersonville district of Georgia are thick and relatively pure; they grade laterally and vertically into sandy kaolin and sand. The sedimentological and mineralogical character of the clay and the enclosing sand suggests deposition in a marine shallow-water to estuarine environment. Palynomorph and invertebrate fossil assemblages...
Paleo-oceanography of the Norwegian Sea during the past 130,000 years: Coccolithophorid and foraminferal data
P.E. Belanger
1982, Boreas (11) 29-36
Faunal, floral and sedimentological properties of Norwegian Sea core V27-86 were examined in order to reconstruct the paleo-oceanographic history of this region. Downcore variations in the relative abundance of three microfossil groups and several sediment properties exhibit three different climate response patterns (CRP). Each pattern is judged to represent the...
Northern East Pacific Rise: Magnetic anomaly and bathymetric framework
Kim D. Klitgord, Jacqueline Mammerickx
1982, Journal of Geophysical Research B: Solid Earth (87) 6725-6750
The oceanic crust in the eastern Pacific between 7°N and 30°N and east of 127°W contains a fairly complete history of the spreading centers associated with the East Pacific Rise since 25 m.y. B.P. (late Oligocene). In this paper, we have summarized the seafloor spreading magnetic-anomaly data and the bathymetric...
The Georges Bank monitoring program: analysis of trace metals in bottom sediments
Michael H. Bothner
1982, Report
No abstract available....
Iridium abundance measurements across the Cretaceous/Tertiary boundary in the San Juan and Raton Basins of northern New Mexico
C. J. Orth, J. S. Gilmore, J.D. Knight, R.H. Tschudy, C. L. Pillmore, James E. Fassett
1982, GSA Special Papers (190) 423-433
During the past year we have been measuring trace element abundances and searching for anomalously high iridium (Ir) concentrations in continental sedimentary rocks that span the Cretaceous-Tertiary boundary in the Raton and San Juan Basins of northern New Mexico and southern Colorado. Using neutron activation and radiochemical separations, we have...
Observations of strain accumulation across the San Andreas fault near Palmdale, California, with a two-color geodimeter
J. O. Langbein, Mark F. Linker, Art McGarr, L.E. Slater
1982, Science (218) 1217-1219
Two-color laser ranging measurements during a 15-month period over a geodetic network spanning the San Andreas fault near Palmdale, California, indicate that the crust expands and contracts aseismically in episodes as short as 2 weeks. Shear strain parallel to the fault has accumulated monotonically since November 1980,...
Triggering of large earthquakes by magma-chamber inflation, Izu Peninsula (Japan)
Wayne R. Thatcher, James C. Savage
1982, Geology (10) 637-640
A close spatial and temporal association between three aseismic uplift episodes and subsequent large (M ≈ 7) earthquakes on the Izu Peninsula, Japan, suggests a causal relation. Quaternary geology, as well as studies by other workers, indicates a volcanic origin for the observed uplift, and we use a simple inflation...
