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...
Diamonds in an upper mantle peridotite nodule from kimberlite in southern Wyoming
M. E. McCallum, D.H. Eggler
1976, Science (192) 253-256
Diamonds in a serpentinized garnet peridotite nodule from a diatreme in southern Wyoming are the first known occurrence in an upper mantle peridotite xenolith from a kimberlite intrusion in North America as well as the second authenticated occurrence of diamonds from kimberlite pipes in North America. The nodule is believed...
Tool use in a social insect and its implications for competitive interactions
Joan H. Fellers, Gary M. Fellers
1976, Science (192) 70-72
Four species of myrmicine ants, Aphaenogaster rudis, A. treatae, A. tennesseensis, and A. fulva, use pieces of leaf, mud, and sand grains as tools to carry soft foods from distant sources to the colony. Tools are tended on the food and removed by colony members without regard to which individual brought the tool. Food...
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....
A hematologic survey of captive waterfowl
H.J. Shave
1976, Journal of Wildlife Diseases (12) 195-201
Hematologic parameters were studied in giant Canada geese (Branta canadensis maxima), mallard ducks (Anas platyrhynchos platyrhynchos) and various species of diving ducks at seasonal intervals throughout the year. Highest values for packed cell volume, hemoglobin content and erythrocyte counts were found in the winter and pre-nesting periods. Mean...
Rapid diagnostic approaches in the identification of gram-negative bacterial diseases of fish
E. B. Shotts Jr., G. L. Bullock
1976, Fish Pathology (10) 187-190
No abstract available....
An experiment in earthquake control at Rangely, Colorado
C.B. Raleigh, J. H. Healy, J.D. Bredehoeft
1976, Science (191) 1230-1237
An experiment in an oil field at Rangely, Colorado, has demonstrated the feasibility of earthquake control. Variations in seismicity were produced by controlled variations in the fluid pressure in a seismically active zone. Precise earthquake locations revealed that the earthquakes clustered about a fault trending through a zone of high...
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...
Interstation correlation of peak-flow estimates
Clayton H. Hardison
1976, Journal of Research of the U.S. Geological Survey (4) 221-222
Equations are given for using the correlation coefficient between annual peaks at a pair of stream gaging stations to estimate the interstation correlation coefficient of estimated T-year peaks, computed standard deviations, and computed skew coefficients at the same pair of stations. The equations are based on statistics computed from samples...
Flameless atomic absorption determination of bismuth in soils and rocks
W. H. Ficklin, F. N. Ward
1976, Journal of Research of the U.S. Geological Survey (4) 217-220
Recent advances in flameless atomic absorption allow determinations of bismuth in concentrations as small as 50 ppb in 0.2 g of rock or soil sample. The sample is fused with sodium bisulfate and the fusion product is leached with hot 2 M hydrochloric acid and treated with ammonium citrate, (ethylenedinitrilo)...
A review of the minerals of the alunite-jarosite, beudantite, and plumbogummite groups
Theodore Botinelly
1976, Journal of Research of the U.S. Geological Survey (4) 213-216
Minerals of the alunite-jarosite, beudantlte, and plumbogummite groups can be divided on the basis of iron or aluminum content into two groups which are consistent in optical and X-ray characteristics. Both chemical and X-ray data are needed for identification....
Definitive X-ray powder data for covellite, anilite, djurleite, and chalcocite
Robert W. Potter II, Howard T. Evans Jr.
1976, Journal of Research of the U.S. Geological Survey (4) 205-212
By using the Guinier-Hägg focusing X-ray powder camera with CrKα1 and CuKα1 radiations, new powder data for covellite (CuS), anilite (Cu7S4, djurleite (Cu1.934S), and low chalcocite (Cu2S) have been obtained from synthetic and natural materials. The powder data were treated by least-squares analysis to obtain the best unit-cell parameters consistent...
