Chemical residue content and hatchability of screech owl eggs
Erwin E. Klaas, D. M. Swineford
1976, The Wilson Bulletin (88) 421-426
Eggs of wild Screech Owls were collected from nests in northwestern Ohio in 1973. One egg was taken from each of 19 nests near the start of incubation. Mean shell thickness in these 19 eggs and mean thickness of 16 unhatched eggs did not differ from 49 archival eggs collected...
Hydrogeology of a drift-filled bedrock valley near Lino Lakes, Anoka County, Minnesota
T. C. Winter, H.O. Pfannkuch
1976, Journal of Research of the U.S. Geological Survey (4) 267-276
The bedrock surface of east-central Minnesota is dissected by an intricate network of valleys. Outside the bedrock valley at site B, 3 mi (4. 8 km) from site A, 100 ft (30 m) of drift overlies the bedrock surface. Observation wells were installed...
Mathematical models for nonparametric inferences from line transect data
K.P. Burnham, David R. Anderson
1976, Biometrics (32) 325-336
A general mathematical theory of line transects is develoepd which supplies a framework for nonparametric density estimation based on either right angle or sighting distances. The probability of observing a point given its right angle distance (y) from the line is generalized to an arbitrary function g(y). Given only that...
Evaluation of LANDSAT-1 image applications to geologic mapping, structural analysis and mineral resource inventory of South America with special emphasis on the Andes Mountain region: Type III final report for period January 1973 to July 1974
William D. Carter
1976, Report
The author has identified the following significant results. The discovery of copper mineralization along a lineament mapped in Area 7 (La Paz) has lent credence to the use of LANDSAT 1 data as a basic step in mineral exploration. In Area 9 (Copiapo Region), a number of lineaments were found...
Analysis of slump slip lines and deformation fabric in slumped Pleistocene lake beds
Byron D. Stone
1976, Journal of Sedimentary Research (46) 313-325
Slumped glacial delta sands and silts exhibit flexural slip folds and low-angle thrust faults where the beds remained coherent during slump deformation. Alternating cross-cutting relationships between f (sub l ) and f (sub r ) fold axial planes indicate that these fold groups are conjugate sets, related to the same...
Western Energy and Land Use Team preliminary FY 76 project list and status report: May 20, 1976
1976, Report
No abstract available....
Influence of stimuli from populations of Peromyscus leucopus on maturation of young
J.G. Rogers Jr., G.K. Beauchamp
1976, Journal of Mammalogy (57) 320-330
The effects of stimuli associated with conspecific laboratory populations on parameters of sexual maturation in Peromyscus leucopus were examined. Beginning at birth, experimental litters were exposed to the constant infusion of urine, feces, and other material from the populations through a metabolism funnel into their cages. As evidenced by age at...
Natural hazards in mountain Colorado
Jack D. Ives, Authur I. Mears, Paul E. Carrara, Michael J. Bovis
1976, Annals of the American Association of Geographers (66) 129-144
Interdisciplinary field studies and remote sensing techniques were used to delineate mountain areas in Colorado subject to such natural hazards as snow avalanches, mudflows, rockfalls, and landslides. The old mining townsite of Ophir in the northwestern San Juan Mountains was used as a case study. Its serious snow avalanche hazard...
Marine diatom and silicoflagellate biostratigraphy of the type Delmontian Stage and the type Bolivina obliqua Zone, California
John A. Barron
1976, Journal of Research of the U.S. Geological Survey (4) 339-351
Investigation of the marine diatom and silicoflagellate biostratigraphy of the type Delmontian Stage and and type Bolivina obliqua Zone in California shows that the type Delmontian Stage is equivalent to part of the supposedly older Mohnian Stage and is early late Miocene. The type Bolivina obliqua Zone, which conformably overlies...
Mississippian history of the northern Rocky Mountains region
William Jasper Sando
1976, Journal of Research of the U.S. Geological Survey (4) 317-338
The Mississippian history of the northern Cordilleran region of the United States consists of two principal depositional cycles separated by a cycle of epeirogenic uplift and erosion. Each depositional cycle is divisible into phases that represent significant changes in depositional patterns. During Cycle I (early Kinderhookian-early Meramecian), predominantly carbonate and...
Enhydra and Enhydriodon from the Pacific Coast of North America
Charles Albert Repenning
1976, Journal of Research of the U.S. Geological Survey (4) 305-315
Two lineages of the "crab-eating" otter Erihydriodon, from the Old World Miocene and Pliocene, are suggested by the fossil record. One appears to lead to the late Pliocene Enhydriodon sivalensis from Villafranchian-equivalent beds in India and can be characterized by the presence of a parastyle on P4 and by the...
Epifauna at Jackson Point in Port Valdez, Alaska, December 1970 through September 1972
Jon W. Nauman, Donald R. Kernodle
1976, Journal of Research of the U.S. Geological Survey (4) 299-304
A biological sampling program at Jackson Point in Port Valdez, Alaska, was begun in December 1970. Sixteen artificial substrate samplers (8 multiplate and 8 rock-fllled baskets with net liners) were retrieved after 2 to 4 months' exposure. The most common groups in order of their abundance were Copepoda, Foraminifera, Nematoda,...
Development of a standard rating for the Price pygmy current meter
Verne R. Schneider, George F. Smoot
1976, Journal of Research of the U.S. Geological Survey (4) 293-297
Fifty new Price pygmy current meters, 50 used Price pygmy meters with used rotors, 50 used Price pygmy meters with new rotors, and 26 used Price pygmy meters with straight uniform (nonbeaded) contact wires were rated individually in a towing tank. A standard rating of V=0.961N+0.039 (V=0.293N+0.012), where V is...
A simplified slope-area method for estimating flood discharges in natural channels
H. C. Riggs
1976, Journal of Research of the U.S. Geological Survey (4) 285-291
Discharge of a stream may be computed from the slope of the water surface, the cross-sectional area, and an estimate of channel roughness. This, the slope-area method, is widely used to compute flood peak discharges from high-water marks. Reliability of a computed discharge depends largely on the roughness coefficient, which...
Two-dimensional steady-state dispersion in a saturated porous medium
Akio Ogata
1976, Journal of Research of the U.S. Geological Survey (4) 277-284
A previously developed analytical solution for two-dimensional dispersion is computed for various conditions. These results were then compared with solution of previously developed approximate models of transverse dispersion which were used to analyze experimentally derived concentration distribution. Comparison established that, whenever steady state was reached, the values of dispersion coefficient...
Factors affecting declining water levels in a sewered area of Nassau County, New York
Murray S. Garber, Dennis J. Sulam
1976, Journal of Research of the U.S. Geological Survey (4) 255-265
Double-mass-curve analysis of ground-water levels in Nassau County, Long Island, N.Y., shows that the average-weighted ground-water levels in a 32-mi2 (83-km2) segment of a sewered area declined 11.8 ft (3.6 m) relative to an adjacent unsewered area to the east during 1953-72. Electric-analog-model analysis indicates that 4.9 ft (1.5...
Intermediate-scale mapping
J. LeRoy Ward
1976, Journal of Research of the U.S. Geological Survey (4) 253-254
The U.S. Geological Survey has introduced an intermediate-scale map series (1:100,000 and 1:50,000) in response to the demand for maps at scales between the 1:24,000 and 1:250,000 standard series. The goal is to provide basic cartographic data at the level of detail and in the format selected by Federal, State,...
A reconnaissance study of the uranium and thorium contents of plutonic rocks of the southeastern Seward Peninsula, Alaska
Thomas P. Miller, Carl M. Bunker
1976, Journal of Research of the U.S. Geological Survey (4) 367-377
Large granitic Cretaceous plutons are exposed along and adjacent to an arcuate belt of igneous and high-grade raetamorphic rocks in the southeastern Seward Peninsula of Alaska. Reconnaissance studies of these plutons have shown that the Darby pluton has well above average amounts of uranium and thorium (11.2 ppm and 58.7...
Ocher as a prospecting medium in the Montezuma district of central Colorado
George J. Neuerburg, Theodore Botinelly
1976, Journal of Research of the U.S. Geological Survey (4) 359-365
Ocher occurs widely In the Montezuma district as small sinters and as bedded deposits of bog iron and ocher-cemented conglomerates. The iron of the ochers is derived from pyrite-rich veins and from pyritic hydrothermally altered rocks. Trace amounts of ore metals in the ocher and its admixed detritus are...
Sediment-filled pots in upland gravels of Maryland and Virginia
Louis C. Conant, Robert F. Black, John W. Hosterman
1976, Journal of Research of the U.S. Geological Survey (4) 353-358
Pot-shaped depressions filled with sandy clayey silt are found in "Upland" gravels (previously termed Brandywine) of probable Miocene age, in northeastern Maryland and in Virginia near Washington, D.C. The pots are about 7 ft (2m) deep and commonly are about as wide. In plan, many are strongly elliptical. Sides are...
Differential inhibition of host protein synthesis in L cells infected with RNA - temperature-sensitive mutants of vesicular stomatitis virus
P. E. McAllister, R.R. Wagner
1976, Journal of Virology (18) 550-558
The response of mouse L cells to infection with wild-type (wt) and temperature-sensitive (ts) mutants of vesicular stomatitis virus was monitored by sodium dodecyl sulfate-polyacrylamide gel electrophoresis to delineate the synthesis of host cell and viral proteins. Experiments utilized transcriptase mutants of complementation group I (ts114 and ts13), a group...
Direct dating of mineralization at Goldfield, Nevada, by potassium-argon and fission-track methods
Roger P. Ashley, M.L. Silberman
1976, Economic Geology (71) 904-924
Potassium-argon dating of hypogene alunite and K-mica from hydrothermally altered rocks at Goldfield, Nevada, yields mineralization ages of 20 to 21 m.y., in good agreement with a mineralization age established by potassium-argon dating of unaltered premineralization and postmineralization volcanic units. Premineralization volcanic units that are pervasively propylitized cannot be dated...
Effects of local geological conditions in the San Francisco Bay region on ground motions and the intensities of the 1906 earthquake
Roger D. Borcherdt, James F. Gibbs
1976, Bulletin of the Seismological Society of America (66) 467-500
Measurements of ground motion generated by nuclear explosions in Nevada have been completed for 99 locations in the San Francisco Bay region, California. The recordings show marked amplitude variations in the frequency band 0.25 to 3.0 Hz that are consistently related to the local geological conditions of the recording site....
Amino acids and gases in some springs and an oil field in California
John B. Rapp
1976, Journal of Research of the U.S. Geological Survey (4) 227-232
Samples of water and gas were collected from six springs and two wells in the Upper Cretaceous Great Valley sequence and Franciscan Formation underlying the Coast Range of northern California and from four oil wells penetrating Tertiary sedimentary rocks in the Kettleman North Dome oil field. Comparison of the dissolved...
Reassessment of mercury in surface water in the Adirondack region, New York
William Buller
1976, Journal of Research of the U.S. Geological Survey (4) 223-226
A study in 1970 established a natural background concentration of mercury in surface water in the Adirondack region of New York. In 1974, new methods of sample preservation and analysis were used in determining concentrations of mercury of samples of water from the same surface-water sites sampled in 1970-71. Concentrations...
