Areal lithologic changes in bedrock aquifers in southeastern Minnesota as determined from natural-gamma borehole logs methods
D. G. Woodward
1984, Conference Paper
Sedimentary rocks of Paleozoic age in the Hollandale embayment in southeastern Minnesota are as much as 2,000 feet thick and, with the underlying Hinckley sandstone of Proterozoic age, comprise the following five layered aquifers (beginning with the oldest): the Mount Simon-Hinckley, Ironton-Galesville, Prairie du Chien-Jordan, St. Peter and Upper Carbonate....
The study of buried drift aquifers in Minnesota by seismic geophysical methods
D. G. Woodward
1984, Report
Buried-drift aquifers are stratified sand and (or) gravel aquifers in glacial deposits that cannot be seen or inferred at the land surface. During the Pleistocene Epoch, four continental glaciations advanced and retreated across Minnesota, blanketing the bedrock surface with drift as much as 700 feet thick (fig. 1). Most of...
Geology of the Precambrian rocks and rocks of the northern Harrat Hutaymah volcanic field, Baq'a quadrangle, sheet 27F, Kingdom of Saudi Arabia
Karl S. Kellogg, Saudi Arabia. Deputy Ministry for Mineral Resources, U.S. Geological Survey Saudi Arabia Mission
1984, Report
Precipitation and streamflow data - Collections techniques
R. G. Brown
1984, Conference Paper, Understanding Watershed and Lake Management Conference, Bloomington, Minnesota, March 23, 1984 [Proceedings]
No abstract available....
Monitoring range utilization on the Crow Creek Indian Reservation
R. H. Haas, D. C. Johnston
1984, Report
No abstract available....
Pennsylvania gazetteer of streams: Part II
L. C. Shaw
1984, Water Resources Bulletin 16
No abstract available....
Tertiary marine pelecypods of California and Baja California; Propeamussiidae and Pectinidae
Ellen James Moore
1984, Professional Paper 1228-B
No abstract available....
Time-domain reflectometry: Simultaneous measurement of soil water content and electrical conductivity with a single probe
F.N. Dalton, W.N. Herkelrath, D.S. Rawlins, J.D. Rhoades
1984, Science (224) 989-990
Two parallel metallic rods were used as a wave guide to measure the dielectric constant and electrical conductivity of soils having different electrical conductivities but the same water content. Measurements showed that the two parameters were sufficiently independent to permit simultaneous determinations of water content and bulk electrical conductivity....
Seismic potential revealed by surface folding: 1983 Coalinga, California, earthquake
R.S. Stein, G.C.P. King
1984, Science (224) 869-872
The 2 May 1983 Coalinga, California, earthquake (magnitude 6.5) failed to rupture through surface deposits and, instead, elastically folded the top few kilometers of the crust. The subsurface rate of fault slip and the earthquake repeat time are estimated from seismic, geodetic, and geologic data. Three larger earthquakes (up to...
Brief comparison of some technological and environmental aspects of large-scale surface and underground mining of oil shale, Piceance Creek Basin, Colorado
G.A. Miller, John R. Dyni, D.R. Dietz
1984, Conference Paper, 17th oil shale symposium proceedings
Comparison of several aspects of surface and underground methods of mining for large-scale oil shale extraction in the Piceance Creek Basin suggests that surface mining techniques may have several advantages over underground methods. For a production level of one million barrels of shale oil per day,...
A seismic refraction study of the Oregon Cascades
Donald S. Leaver, Walter D. Mooney, W.M. Kohler
1984, Journal of Geophysical Research B: Solid Earth (89) 3121-3134
A 275‐km‐long reversed refraction profile in the Oregon Cascades, two shallow earthquakes of magnitude 5 in southern Washington, a shallow earthquake of magnitude 4.6 in northern California, and a previously published analysis of the Bouguer gravity field are used to develop a crustal P wave velocity model for the...
Effects of an urban wetland on sediment and nutrient loads in runoff
R. G. Brown
1984, Wetlands (4) 147-158
An urban wetland in the Minneapolis-St. Paul Metropolitan Area was found to retain sediment and nutrient loads in runoff routed through the wetland. Sediment and nutrient loads in runoff were measured during 1982 at the inlet and outlet of the 6.4-bectare urban wetland. Comparison of annual loads entering and...
Interlaminated ice-proximal glacimarine sediments in Muir Inlet, Alaska
N.E. Mackiewicz, R.D. Powell, P.R. Carlson, Bruce F. Molnia
1984, Marine Geology (57) 113-147
Muir Inlet in Glacier Bay, Alaska, is a glacial fjord receiving a tremendous volume of sediment annually. The rate of sediment accumulation is greatest proximal to Muir Glacier (about 9 m yr−1) and decreases away from the glacier. The primary sediment sources are meltwater streams discharging at subglacial and ice-marginal...
Significance of biomass and light availability to phytoplankton productivity in San Francisco Bay
Brian E. Cole, James E. Cloern
1984, Marine Ecology Progress Series (17) 15-24
Primary productivity was measured monthly at 6 sites within San Francisco Bay, USA, throughout 1980. The 6 sites were chosen to represent a range of estuarine environments with respect to salinity, phytoplankton community composition, turbidity, and water depth. Annual net production over the photic zone ranged from 95 to 150...
Multiple microtektite horizons in upper eocene marine sediments?
B.P. Glass
1984, Science (224) 309-310
No abstract available....
Ancient ice islands in salt lakes of the Central Andes
S. H. Hurlbert, Cecily C.Y. Chang
1984, Science (224) 299-302
Massive blocks of freshwater ice and frozen sediments protrude from shallow, saline lakes in the Andes of southwestern Bolivia and northeastern Chile. These ice islands range up to 1.5 kilometers long, stand up to 7 meters above the water surface, and may extend out tens of meters and more beneath...
Determination of hydraulic conductivity in three dimensions and its relation to dispersivity: Chapter D in Ground-water contamination by crude oil at the Bemidji, Minnesota, research site; US Geological Survey Toxic Waste--ground-water contamination study
1984, Water-Resources Investigations Report 84-4188-D
Recent investigations suggest that dispersion in aquifers is scale dependent and a function of the heterogeneity of aquifer materials. Theoretical stochastic studies indicate that determining hydraulic-conductivity variability in three dimensions is important in analyzing the dispersion process. Even though field methods are available to approximate hydraulic conductivity in three dimensions,...
Major carbon-14 deficiency in modern snail shells from southern Nevada springs
A.C. Riggs
1984, Science (224) 58-61
Carbon-14 contents as low as 3.3 ± 0.2 percent modern (apparent age, 27,000 years) measured from the shells of snails Melanoides tuberculatus living in artesian springs in southern Nevada are attributed to fixation of dissolved HCO3- with which the shells are in carbon isotope equilibrium. Recognition of the existence of such extreme deficiencies...
Observations on Cretaceous abyssal hills in the northeast Pacific
Stephen L. Eittreim, D.Z. Piper, H. Chezar, D.R. Jones, A. Kaneps
1984, Marine Geology (56) 41-64
An abyssal hills area of 50 × 60 km in the northeast Pacific was studied using bottom transponder navigation, closely spaced survey lines, and long-traverse oblique photography. The block-faulted north—south hills are bounded by scarps, commonly with 40° slopes. On these steep scarps sedimentation is inhibited and pillow basalts often...
Discovery of two new large submarine canyons in the Bering Sea
Paul R. Carlson, Herman A. Karl
1984, Marine Geology (56) 159-179
The Beringian continental margin is incised by some of the world's largest submarine canyons. Two newly discovered canyons, St. Matthew and Middle, are hereby added to the roster of Bering Sea canyons. Although these canyons are smaller and not cut back into the Bering shelf like the five very large...
Comparative ability of northern pintails, gadwalls, and northern shovelers to metabolize foods
Michael R. Miller
1984, Journal of Wildlife Management (48) 362-370
Feeding trials were used to compare the ability of northern pintails (Anas acuta), gadwalls (A. strepera), and northern shovelers (A. clypeata) to metabolize energy from a turkey starter ration, alfalfa pellets, and common barnyardgrass (Echinochloa crusgalli) seeds. No differences (P > 0.05) were detected among the three species for any...
Nest spacing, habitat selection, and behavior of waterfowl on Miller Lake Island, North Dakota
John T. Lokemoen, Harold F. Duebbert, David E. Sharp
1984, Journal of Wildlife Management (48) 309-321
The nesting behavior of a concentration of nesting mallards (Anas platyrhynchos) and gadwalls (A. strepera) was studied on a 4.5-ha island in Miller Lake, North Dakota, in 1977. A single 0.59-ha clump of thick shrub contained 225 simultaneously active mallard nests on 10 May. During the peak nesting period, mallard...
Ecological distribution and crude density of breeding birds on prairie wetlands
Harold A. Kantrud, Robert E. Stewart
1984, Journal of Wildlife Management (48) 426-437
Breeding populations of 28 species of wetland-dwelling birds other than waterfowl (Anatidae) were censused on 1,321 wetlands lying within the prairie pothole region of North Dakota. Ecological distribution and two crude measures of relative density were calculated for the 22 commonest species using eight wetland classes. Semipermanent wetlands supported nearly...
Wood duck and hooded merganser nesting on Arrowwood NWR, North Dakota
Harold A. Doty, F.B. Lee, A.D. Kruse, J.W. Matthews, John R. Foster, Phillip M. Arnold
1984, Journal of Wildlife Management (48) 577-580
No abstract available. ...
Habitat use by migrant sandhill cranes in Nebraska
Gary L. Krapu, D.E. Facey, E.K. Fritzell, Douglas H. Johnson
1984, Journal of Wildlife Management (48) 407-417
The principal spring staging areas of the midcontinent population of sandhill cranes (Grus canadensis) are along the Platte and North Platte rivers in south-central Nebraska. Most of these lands are privately owned and managed for corn and cattle production. Diurnal habitat use by radio-tagged cranes was primarily in cropland (55%),...
