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Comparison of the magnetic properties of glass from Luna 20 with similar properties of glass from the Apollo missions
F. E. Senftle, A. N. Thorpe, C.C. Alexander, C.L. Briggs
1973, Geochimica et Cosmochimica Acta (37) 1053-1062
Magnetic susceptibility measurements have been made on four glass spherules and fragments from the Luna 20 fines; two at 300°K and two from 300°K to 4°K. From these data the magnetic susceptibility extrapolated to infinite field, the magnetization at low fields and also...
Ultrafiltration by a compacted clay membrane-II. Sodium ion exclusion at various ionic strengths
B.B. Hanshaw, T.B. Coplen
1973, Geochimica et Cosmochimica Acta (37) 2311-2327
Several recent laboratory studies and field investigations have indicated that shales and compacted clay minerals behave as semipermeable membranes. One of the properties of semipermeable membranes is to retard or prevent the passage of charged ionic species through the membrane pores while allowing relatively free movement of uncharged species. This...
Selective predation by mink, Mustela vison, on waterfowl
Alan B. Sargeant, George A. Swanson, Harold A. Doty
1973, American Midland Naturalist (89) 208-214
Predation by mink (Mustela vison) on three types of ducks (captive, pen-reared-released and wild) was documented in two studies at the Northern Prairie Wildlife Research Center, Jamestown, North Dakota. In the first study, 36 of 60 flightless adult and juvenile ducks held on eight 0.1-acre experimental ponds disappeared between 10...
Determination of lead, uranium, thorium, and thallium in silicate glass standard materials by isotope dilution mass spectrometry
I. L. Barnes, E. L. Garner, J. W. Gramlich, L. J. Moore, T. J. Murphy, L. A. Machlan, W. R. Shields, Mitsunobu Tatsumoto, R. J. Knight
1973, Analytical Chemistry (45) 880-885
A set of four standard glasses has been prepared which have been doped with 61 different elements at the 500-, 50-, 1-, and 0.02-ppm level. The concentrations of lead, uranium, thorium, and thallium have been determined by isotope dilution mass spectrometry at a number of points in each of the...
Geologic implications of the Apollo 14 Fra Mauro breccias and comparison with ejecta from the Ries Crater, Germany
E. C. T. Chao
1973, Journal of Research of the U.S. Geological Survey (1) 1-18
On the basis of petrographic and laboratory and active seismic data for the Fra Mauro breccias, and by comparison with the nature and distribution of the ejecta from the Ries crater, Germany, some tentative conclusions regarding the geologic significance of the Fra Mauro Formation on the moon can be drawn. The Fra Mauro Formation, as...
Cretaceous mafic conglomerate near Gualala offset 350 miles by San Andreas fault from oceanic crustal source near Eagle Rest Peak, California
Donald C. Ross, Carl M. Wentworth, Edwin D. McKee
1973, Journal of Research of the U.S. Geological Survey (1) 45-52
Upper Cretaceous mafic conglomerate and quartz-plagioclase arkose that crop out on the southwest side of the San Andreas fault near Gualala, Calif., may have been eroded from a gabbroic terrane that now lies about 350 miles to the southeast, on the opposite side of the San Andreas fault. The plagioclase arkose near Gualala contains little...
Waterfowl production on stock-watering ponds in the northern plains
J. T. Lokemoen
1973, Journal of Range Management (26) 179-184
In a 5-year study of stock-watering ponds in western North Dakota, pond size was found to be the major factor influencing duck use. As pond size increased, total pair and brood use per pond increased. Pairs used ponds as small as 0.1 acre in size, but broods were seldom seen...
Influence of radio packs on captive mallards and blue-winged teal
R. J. Greenwood, A.B. Sargeant
1973, Journal of Wildlife Management (37) 3-9
Back-mounted radio packs of three weights were attached to 30 captive mallards (Anas platyrhynchos) and 30 blue-winged teal (A. discors), and physical condition of the birds was evaluated for 12 weeks. All groups with radio packs lost more weight than did control groups. Feather wear often followed by skin irritation...
The role of the Bureau of Sport Fisheries and Wildlife in the Great Lakes
F. Eugene Hester
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Ecological blunders of man, such as timber exploitation, draining of wetlands, construction of canals and dams, and pollution have been mainly responsible for serious environmental degradation and catastrophic losses of fish and wildlife values in the Great Lakes Basin. Consequently, the major emphasis of the Bureau of Sport Fisheries and...
Federal Great Lakes fishery research objectives, priorities, and projects
Howard D. Tait
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Fishery productivity of the Great Lakes has declined drastically since settlement of the area. Premium quality fishes of the Great Lakes such as whitefish, lake trout, and walleyes have been replaced by less desired species. This change is attributed to selective overfishing, pollution, and the extreme instability of fish populations....
Migrational homing by a pair of mallards
T.J. Dwyer, S.R. Derrickson, D.S. Gilmer
1973, The Auk (90) 687-687
It is generally assumed that wild, North American female dabbling ducks (Anatinae: Anatini) select new mates each year and may return to the same nesting areas in consecutive years (McKinney 1964, Wildfowl 16: 93). Lincoln (1934, Bird-Banding 5: 151) first documented migrational homing in a female Mallard (Anas platyrhynchos), and...
Selected hydrologic data, lower Bear River drainage basin, Box Elder County, Utah
L.J. Bjorklund, L. J. McGreevy
1973, Utah Basic-Data Release 23
This report presents selected basic data from a study of the ground- water resources of the lower Bear River drainage basin, Box Elder County, Utah. The study was made during 1970-72 by the U.S. Geological Survey in cooperation with the Utah Department of Natural Resources, Division of Water Rights. Incorporated...
River channel change with time : An example
Luna Bergere Leopold
1973, Geological Society of America Bulletin (84) 1845-1860
Monumented channel cross sections were resurveyed over a period of 20 yrs (1953 to 1972) to determine the amount and kind of change of channel area and position on a 3.7-sq-mi basin, Watts Branch near Rockville, Maryland. For the first 12 yrs, the channel progressively but slowly became smaller as...