The U.S. Geological Survey's gravity program in the Rocky Mountain and Basin Range areas
M. Dean Kleinkopf, Donald W. Peterson
1969, Eos, Transactions, American Geophysical Union (50) 529-531
Most of the gravity surveys of the U.S. Geological Survey have been support programs in connection with regional geologic structural studies, ground-water investigations, and heavy-metals exploration. Many of the studies were undertaken in conjunction with geological mapping and mineral...
Standardization of gravimeter calibrations in the geological survey
David J. Barnes, Howard W. Oliver, Stephen L. Robbins
1969, Eos Science News (50) 526-527
The calibration of gravimeters has long been primarily the concern of geodesists involved in measuring large gravity differences, but recent developments suggest that the precision and stability of gravimeter calibrations may have greater geologic importance in the future. First, the use of high-speed computers and an increasing variety of supplemental...
Some aspects of the effects of the quantity and quality of water on biological communities in Everglades National Park
Milton C. Kolipinski, Aaron L. Higer
1969, Open-File Report FL 69-007
No abstract available....
A comparison of methods used to obtain age ratios of snow and Canada geese
Kenneth F. Higgins, Raymond L. Linder, Paul F. Springer
1969, Journal of Wildlife Management (33) 949-956
The validity of group counts, cannon-net catches, and hunter-bag checks for estimating productivity of lesser snow geese (Anser caerulescens caerulescens) and small Canada geese (Branta canadensis hutchinsii-parvipes complex) was studied at Sand Lake National Wildlife Refuge during the falls of 1965 and 1966. Age ratios of snow geese obtained from...
Waterfowl production in relation to grazing
Leo M. Kirsch
1969, Journal of Wildlife Management (33) 821-828
A 4-year production study of upland nesting waterfowl on the Missouri Coteau area of North Dakota showed that pair numbers, nesting densities and nest success were generally reduced by grazing. It is suggested that cover removal such as regular grazing and mowing be discontinued on areas managed primarily for waterfowl...
Bursal depths of lesser snow and small Canada geese
Kenneth F. Higgins
1969, Journal of Wildlife Management (33) 1006-1008
Bursa of Fabricius depths of 88 lesser snow geese (Anser c. caerulescens) and 69 small Canada geese (Branta canadensis hutchinsii/parvipes complex) were measured. Bursal depths were unreliable indicators of age-classes of lesser snow geese and small Canada geese; previously, the same had been found to be true for large Canada...
Pituitary activation by bacterial endotoxins in the rainbow trout (Salmo gairdneri)
Gary Wedemeyer
1969, Journal of Bacteriology (100) 542-543
Endotoxins from Escherichia coli and Aeromonas salmonicida caused marked cortisol production in the rainbow trout (Salmo gairdneri)....
A cable-chain device for locating duck nests
Kenneth F. Higgins, Leo M. Kirsch, I. Joseph Ball Jr.
1969, Journal of Wildlife Management (33) 1009-1011
A cable-chain device towed between two vehicles was developed for locating occupied duck nests in brushy, herbaceous, and grassy cover types. Twenty-three of 29 previously located gadwall (Anas strepera) and blue-winged teal (A. discors) hens were flushed from their nests with the drag for an efficiency of 79 percent. Eighty...
Establishing hunting regulations and allowable harvest of mallards in the United States
Aelred D. Geis, R. Kahler Martinson, D. Randerson
1969, Journal of Wildlife Management (33) 848-859
As a major part of establishing hunting regulations each year in the United States, data for the mallard (Anas platyrhynchos) are examined extensively to estimate the effect of various harvest strategies on the breeding population the following spring. This requires estimates of the breeding-population level and of the production, harvest,...
Effect of restrictive hunting regulations on canvasbacks and redhead harvest rates and survival
Aelred D. Geis, Walter F. Crissey
1969, Journal of Wildlife Management (33) 860-866
Because of low population levels, there were especially restrictive hunting regulations between 1958-1965, including complete closures during the 1960-1963 seasons, for canvasback (Aythya valimeria) and redhead (A. americana) ducks. Banding data from 1952 through 1965 indicated that restrictive regulations reduced both harvest and annual mortality rates. During the period with...
Flow of a disperse emulsion of crude oil in water in porous media
John C. Cartmill, Parke A. Dickey
1969, Conference Paper, Fall meeting of the Society of Petroleum Engineers of AIME
It has been suggested that oil migrates through reservoir sands in the form of a fine, disperse emulsion of oil in water, and that oil accumulations occur where the stream enters finer-grained rock such as silt or shale. In order to investigate the possible mechanisms, stable emulsions of oil in...
Potassium-argon ages bearing on the igneous and tectonic history of the Elk Mountains and vicinity, Colorado: A preliminary report
John D. Obradovich, Felix E. Mutschler, Bruce H. Bryant
1969, Geological Society of America Bulletin (80) 1749-1756
K-Ar ages for epizonal plutonic rocks together with field studies indicate that uplift of the Sawatch Range began at least 72 m.y. ago. Vertical uplift of the Sawatch Range was followed or accompanied by gravity sliding of sedimentary rocks along the Elk Range thrust fault. The greatest volume of exposed...
Thermal additions and epifaunal organisms at Chalk Point, Maryland
Jon W. Nauman, Robert L. Cory
1969, Chesapeake Science (10) 218-226
Two sets of test panels, one in the intake and the other in the effluent canal of a steam-generating station, were submerged at monthly intervals in 1967. The panels were analyzed for epifaunal species composition, abundance, seasonal attachment, and total biomass production. The average surface-water temperature rose 6.3 C above...
Possible relation of mineralization to thermal springs in the Creede District, San Juan mountains, Colorado; a discussion
Thomas August Steven (compiler)
1969, Economic Geology (64) 696-698
No abstract available....
Cretaceous-Tertiary events in Southeast Asia: Discussion
Thomas W.C. Hilde, Celeste G. Engel
1969, Geological Society of America Bulletin (80) 1887-1887
No abstract available....
A system for planning and scheduling water resources studies and construction projects
E. F. LeRoux, D. G. Jorgenson
1969, Groundwater (7) 16-18
A simplification of the two most commonly used methods of network planning and scheduling is ideally suited to the planning and evaluation of both water resources studies and construction projects. The project planning diagrams illustrate the system for scheduling of project activities and the relation of...
An application of surface geophysical techniques to the study of watershed hydrology
Ronald R. Shields, William E. Sopper
1969, Journal of the American Water Resources Association (JAWRA) (5) 37-49
The applicability of geophysical methods to experimental watershed research is demonstrated by a study of a 106-acre forested watershed in central Pennsylvania. Data from a shallow seismic refraction study and an electrical resistivity study of the watershed were used to determine the depth of soils, their volumes, depth to bedrock,...
Chemical composition of the hydrothermal fluids responsible for the lead-zinc deposits at Providencia, Zacatecas, Mexico
Robert O. Rye, Joseph Haffty
1969, Economic Geology (64) 629-643
The chemical composition of 22 samples of primary fluid inclusions in quartz, calcite, and sphalerite from Providencia, Mexico, has been determined. Samples were prepared, crushed, and leached as described by Roedder et al. (1963). Cation analyses of leachates were made by atomic absorption spectroscopy, and the anions were analyzed by...
The ground-water situation in Ohio
Stanley Eugene Norris
1969, Groundwater (7) 25-33
Present ground-water use in Ohio, approximately 650mgd (million gallons per day) amounts to about 5 percent of the water that enters the ground-water reservoirs. The largest ground-water supplies are developed where natural concentrations of water occur, chiefly in the watercourse aquifers, which consist of sand and gravel of glacial origin...
Aeromagnetic investigation of crustal structure for a strip across the western United States
Isidore Zietz (compiler), Paul D. Bateman, James E. Case, M. D. Crittenden Jr., Andrew Griscom, Elizabeth R. King, R. J. Roberts, George R. Lorentzen
1969, Geological Society of America Bulletin (80) 1703-1714
This report represents part of a larger study undertaken to interpret the gross features of the earth's crust by aeromagnetic methods. The larger survey covers a 100-mile-wide strip along a great circle arc from Washington, D.C., to San Francisco, California. The area considered extends from about 200 miles east of...
Cretaceous, Tertiary, and early Pleistocene rocks from the continental margin in the Bering Sea
David Moody Hopkins, David W. Scholl, Warren O. Addicott, Richard L. Pierce, Patsy Beckstead Smith, Jack A. Wolfe, David Gershanovich, Boris Kotenev, Kenneth E. Lohman, Jere H. Lipps, John D. Obradovich
1969, Geological Society of America Bulletin (80) 1471-1480
Rocks dredged from the continental margin in eastern Bering Sea in and near the Pribilof Canyon indicate that the acoustic basement represents the upper surface of thoroughly lithified turbidite beds of graywacke and siltstone of Late Cretaceous age. The stratified sequence covering the acoustic basement is gently deformed and includes...
Application of deep electrical soundings for groundwater exploration in Hawaii
Adel A.R. Zohdy, Dallas B. Jackson
1969, Geophysics (34) 584-600
Forty-five resistivity soundings, using Schlumberger and equatorial dipole electrode configurations, were made on the islands of Oahu and Hawaii to determine the applicability of direct current resistivity methods for locating freshwater aquifers in the State of Hawaii. The soundings were made on the northwestern part of the island of Oahu...
Geology and geochemistry of the Cortez gold deposit, Nevada
John West Wells, Lee R. Stoiser, James Earl Elliott
1969, Economic Geology (64) 526-537
No abstract available....
Peridotite-gabbro complexes as keys to petrology of mid-oceanic ridges
T. P. Thayer
1969, Geological Society of America Bulletin (80) 1515-1522
Two suites of olivine-rich ultramafic and feldspathic rocks appear to be present in the Mid-Atlantic Ridge: one which seems to have alkalic affinities, and one similar to the chromitite- bearing alpine peridotite-gabbro complexes. The similarities of rocks in the two environments—continental and oceanic—imply that much about the petrology of mid-oceanic...
Primary protodolomite in echinoid skeletons
Johannes H. Schroeder, Edward J. Dwornik, James J. Papike
1969, Geological Society of America Bulletin (80) 1613-1616
Protodolomite has been identified in the teeth of Recent echinoids by means of electron microprobe and X-ray diffraction analyses. The analyses demonstrate a high degree of heterogeneity with respect to magnesium carbonate content in these skeletal parts; the entire spectrum of compositions between magnesium calcite...
