Determination of three‐dimensional velocity anomalies under a seismic array using first P arrival times from local earthquakes: 1. A homogeneous initial model
Keiiti Aki, W.H.K. Lee
1976, Journal of Geophysical Research (81) 4381-4399
Geiger's method of locating local earthquakes has been extended to include the effect of P velocity variation along the ray paths in three dimensions. The crustal structure was modeled by rectangular blocks, and a parameter was assigned to each block describing the perturbation of P wave slowness...
Home range, social behavior, and dominance relationships in the African unstriped ground squirrel, Xerus rutilus
Thomas J. O'Shea
1976, Journal of Mammalogy (57) 450-460
A field study of home range, social behavior, and dominance relationships in the African unstriped ground squirrel, Xerus rutilus, was conducted in semi-arid bushland near Kibwezi, Kenya. Ground squirrels lived alone or in small groups in isolated burrow systems and had broadly overlapping home ranges. They were neither...
Field measurements of apparent Curie temperatures in a cooling basaltic lava lake, Kilauea Iki, Hawaii
Charles J. Zablocki, Robert I. Tilling
1976, Geophysical Research Letters (3) 487-490
Magnetic susceptibility and temperature measurements have been made in two of three holes drilled in 1975 through the crust and into the still molten lens of tholeiitic basalt in Kilauea Iki lava lake (formed in 1959). The temperature above which magnetic susceptibility drops to zero—the apparent Curie temperature—is 540°C. at depths of...
Evidence of post-Pleistocene faults on New Jersey Atlantic outer continental shelf
R. E. Sheridan, H.J. Knebel
1976, American Association of Petroleum Geologists Bulletin (60) 1112-1117
Recently obtained high-resolution seismic profiles (400-4,000-Hz band) show evidence of faults in shallow sedimentary strata near the edge of the Atlantic continental shelf off New Jersey. Apparent normal faults having a throw of about 1.5 m displace sediments to within 7 m of the sea floor. The faults appear to...
Monitoring arctic habitat and goose production by satellite imagery
H.M. Reeves, F.G. Cooch, R. E. Munro
1976, Journal of Wildlife Management (40) 532-541
Spacecraft imagery, especially from the National Atmospheric and Oceanic Administration's Improved TIROS (Television Infra-Red Observational Satellite) Operational Satellites, permits timely evaluations of snow and ice conditions encountered by arctic nesting geese. Imagery from the TIROS satellite for 5 wide]y scattered locations in arctic North America was obtained for three...
Revision of Mississippian stratigraphy, eastern Idaho and northeastern Utah
William Jasper Sando, J. Thomas Dutro Jr., Charles Sandberg, Bernard L. Mamet
1976, Journal of Research of the U.S. Geological Survey (4) 467-479
New paleontologic evidence requires a revision of previous interpretations of the stratigraphy of Mississippian sequences in the Cordilleran miogeosyncline of eastern Idaho and northeastern Utah. A postulated unconformity between rocks of early Osagean age and rocks of middle Meramecian age is no longer tenable in the light of new data....
Evaluation of LANDSAT-2 (ERTS) images applied to geologic structures and mineral resources of South America: Type II progress report for period June 30, 1975-June 30, 1976
William D. Carter, William S. Kowalik
1976, Report
The author has identified the following significant results. The Salar of Coposa is located in northern Chile along the frontier with Bolivia. The surface was divided into six general classes of materials. Analysis of LANDSAT image 1243-14001 by use of interactive multispectral computer (Image 100) enabled accurate repetition of these...
Mississippi carbonate shelf margins, western United States
Peter R. Rose
1976, Journal of Research of the U.S. Geological Survey (4) 449-466
Regional linear carbonate shelf margins, or stratigraphic reefs, are postulated to have developed during Mississippian time along the eastern flank of the Cordilleran miogeosyncline in the Western United States. These shelf margins are analogous to well-documented ancient and modern geologic counterparts, such as the Guadalupian reef of the West Texas...
New molluscan assemblages from the upper member of the Twin River Formation, western Washington: Significance in Neogene chronostratigraphy
Warren O. Addicott
1976, Journal of Research of the U.S. Geological Survey (4) 437-447
New molluscan assemblages of provincial early Miocene age from a previously unrecognized fossiliferous interval of 400 to 500 metres in the uppermost part of the Twin River Formation, western Washington, are referable to the upper part of the "Blakeley" [or Matlockian] Stage. The new biostratigraphic data provide, for the...
Revision of the Carboniferous genus Aulina Smith (Coelenterata, Anthozoa)
William Jasper Sando
1976, Journal of Research of the U.S. Geological Survey (4) 421-435
Morphologic and stratigraphic evidence bearing on the phylogenetic relationships of aulate Carboniferous corals suggests that species previously assigned to the genus Aulina Smith represent at least six different lineages that descended from three different ancestral genera. A classification designed to better reflect phylogenetic relationships includes the new genera Aulokoninckophyllum, Aulostylus,...
Fission-track ages of sphene and apatite of granitic rocks of the Salinian block, Coast Ranges, California
C. W. Naeser, D. C. Ross
1976, Journal of Research of the U.S. Geological Survey (4) 415-420
Fission-track ages have been determined on apatite and sphene from granitic rocks of the Salinian block, California Coast Ranges. The 26 age determinations on sphene range between 68 and 93 m.y. The 24 age determinations on apatite have a greater variation, ranging from 3 to 74 m.y. None of the...
Geology and Rb-Sr ages of reactivated Precambrian gneisses and granite in the Marenisco-Watersmeet area, northern Michigan
P.K. Sims, Zell E. Peterman
1976, Journal of Research of the U.S. Geological Survey (4) 405-414
Rb-Sr dating of Precambrian W (lower Precambrian) gneisses and granitic rocks that form the cores of antiforms or domes mantled by metamorphosed Precambrian X (middle Precambrian) bedded rocks in the Marenisco-Watersmeet area, northern Michigan, shows that the rock systems have been disturbed to different degrees by complex tectonic and...
Geology of the Brysch uranium mine, Karnes County, Texas
Kendall A. Dickinson, Michael W. Sullivan
1976, Journal of Research of the U.S. Geological Survey (4) 397-404
Approximately 13,700 tons (12,400 tonnes) of oxidized uranium ore, averaging about 0.1 percent U2O8, was mined during 1966 and 1967 from the lower unit of the Deweesville Sandstone Member of the upper Eocene Whitsett Formation, from depths of 75 to 90 feet (23-27 m). The mine is in the Karnes...
An evaluation of methods for measuring algal growth
W. Thomas Shoaf, Bruce W. Lium
1976, Journal of Research of the U.S. Geological Survey (4) 497-504
Algal growth was expressed as milligrams dry weight per litre with use of the electronic particle counter for determining cell number and cell volume. A gravimetric constant in milligrams dry weight per cubic micrometre was determined. This constant was applicable throughout the growth curve since there was a linear relationship...
High-level plateaus of the southeastern Beartooth Mountains, Montana and Wyoming: remnants of an exhumed sub-Cambrian marine plain
Frank S. Simons, Theodore J. Armbrustmacher
1976, Journal of Research of the U.S. Geological Survey (4) 387-396
The Beartooth Mountains of south-central Montana and northwestern Wyoming are a northwesterly trending high rugged range made up mainly of Precambrian metamorphic rocks. The southeastern part of the range is characterized by extensive high-altitude flat or gently rolling plateaus separated by deep glaciated canyons. The plateaus along the crest...
Thin-skinned tectonics and potential hydrocarbon traps: Illustrated by a seismic profile in the Valley and Ridge province of Tennessee
Leonard D. Harris
1976, Journal of Research of the U.S. Geological Survey (4) 379-386
Seismic data, although limited to a small part of the western half of the Valley and Ridge province in Tennessee, confirm that the structural style is thin-skinned and that there is a fundamental change from west to east in both the total section preserved and the structural complexities that exist...
Evaluation of three collecting methods for a reconnaissance of stream benthic invertebrates
K. V. Slack, J. W. Nauman, L. J. Tilley
1976, Journal of Research of the U.S. Geological Survey (4) 491-495
A 1-day reconnaissance of the Dietrich River, Alaska, included collection of benthic invertebrates. Three methods were used at each of five stations to increase sampling effectiveness and to evaluate each method. Chironomidae and Plecoptera comprised 91 percent of all individuals and 47 percent of all taxa in the combined faunal...
Simulation of forest changes related to hydrologic variables in the Atchafalaya River basin, Louisiana
M. E. Jennings, C. P. O’Neil
1976, Journal of Research of the U.S. Geological Survey (4) 481-489
Results of forest-trend modeling from one data set in the Atchafalaya River basin show that predicted forest acreage totals for 16 forest types agree within 30 percent of actual values in two-thirds of the comparisons. A forest-trend simulation model based on statistical regression relations of forest and hydrologic variables and...
Blood values of the canvasback duck by age, sex and season
R. M. Kocan, S.M. Pitts
1976, Journal of Wildlife Diseases (12) 341-346
Blood samples were obtained from canvasback ducklings from Manitoba and Saskatchewan and from immature and adult canvasbacks on the Mississippi River near LaCrosse, Wisconsin and the Chesapeake Bay. These samples were used to determine baseline data on red cell counts, hematocrit, total protein, glucose, cholesterol, hemaglobin and distribution of plasma...
Comparative membrane microviscosity of fish and mammalian rhabdoviruses studied by fluorescence depolarization
N.F. Moore, Y. Barenholz, P. E. McAllister, R.R. Wagner
1976, Journal of Virology (19) 275-278
The microviscosity of the hydrophobic region of the membrane of infectious hematopoietic necrosis virus was determined using fluorescence depolarization analysis of the probe 1,6-diphenyl-1,3,5-hexatriene and was found to be much lower at 37 C than that of another rhabdovirus, vesicular stomatitis virus. However, the microviscosity of this fish virus at...
Graphic and analytical methods for assessment of stream-water quality: Mississippi River in the Minneapolis-St Paul metropolitan area, Minnesota
Steven P. Larson, William B. Mann IV, Timothy Doak Steele, R. H. Susag
1976, Water-Resources Investigations Report 76-94
No abstract available....
Residues of DDT and DDE in livers of waterfowl, northeastern Louisiana--1970-71
Donald H. White
1976, Pesticides Monitoring Journal (10) 2-3
A study was conducted to determine the levels of DDT and DDE in the livers of 10 species of waterfowl collected in Louisiana from 1970 to 1971. Livers of 48 of 50 specimens contained detectable levels of DDT and/or DDE. DDT residues ranged from 0.01 to 10.90 ppm; DDE levels...
Gravity and magnetic fields of polygonal prisms and application to magnetic terrain corrections
Donald Plouff
1976, Geophysics (41) 727-741
Computer programs based on the exact calculations of the gravity and magnetic anomalies of polygonal prisms are faster in operation and more accurate than previous programs based on the numerical integration of polygonal laminas. The prism programs also are of more general application than existing computer programs that are based...
Mapping of mountain soils west of Denver, Colorado, for landuse planning
P. W. Schmidt, Kenneth L. Pierce
1976, Conference Paper, Geomorphology and engineering: Binghamton Geomorphology Symposium 7
No abstract available....
Obsidian hydration dating and correlation of Bull Lake and Pinedale Glaciations near West Yellowstone, Montana
Kenneth L. Pierce, J. Obradovich, Irving Friedman
1976, GSA Bulletin (87) 703-710
The ages of the last two glaciations near West Yellowstone, Montana, can be calculated by obsidian hydration techniques that are calibrated by K-Ar dating of obsidian-bearing lava flows. The average age of glacial abrasion of obsidian in the Pinedale terminal moraines is about 30,000 yr, with most age measurements between...
