A sediment budget for southern Lake Michigan: source and sink models for different time intervals
Steven M. Colman, D.S. Foster
1994, Journal of Great Lakes Research (20) 215-228
We have constructed a sediment budget for the southern Lake Michigan basin for sand and for mud during three time periods: the past 100, 5,000, and 10,000 years. For the modern (100-year) sediment budget, accountable sediment sources add up to 93...
Application of studies on the overboard placement of dredged sediments to the management of disposal sites
William Panageotou, Jeffrey Halka
McNair Clark E., editor(s)
1994, Conference Paper, International Conference on Dredging and Dredged Material Placement
From the mid 1960's until 1991, dredging and disposal occurred in the northern Chesapeake Bay without guidelines to maximize the capacity and to minimize the spread of the deposits beyond the disposal sites, particularly toward the navigation channel. Planning for future dredging projects is dependant upon the remaining site capacity...
Geologic map of the Harrison 1 degree x 2 degrees quadrangle, Missouri and Arkansas
Mark A. Middendorf, K.C. Thomas, C.E. Robertson, J.W. Whitfield, E.E. Glick, W. V. Bush, B.R. Haley, J.D. McFarland
1994, Open-File Report 94-430
Comparison of manual and automated pretreatment methods for AMS radiocarbon dating of plant fossils
L. A. Bradley, Thomas W. Stafford Jr.
1994, Radiocarbon (36) 399-405
A new automated pretreatment system for the preparation of materials submitted for accelerator mass spectrometry (AMS) analysis is less time-consuming and results in a higher sample yield. The new procedure was tested using two groups of plant fossils: one group was pretreated using the traditional method, and the second, using...
Flow and chloride transport in the tidal Hudson River, NY
Lawrence A. Weiss, Raymond W. Schaffranek, M. Peter de Vries
1994, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
A one-dimensional dynamic-flow model and a one-dimensional solute-transport model were used to evaluate the effects of hypothetical public-supply water withdrawals on saltwater intrusion in a 133-mile reach of the tidal Hudson River between Green Island dam, near Troy, N.Y., and Hastings-on-Hudson, N.Y. Regression techniques were used in analyses of current...
Operation of hydrologic data-collection stations by the U.S. Geological Survey in 1993
Alberto Condes de la Torre
1994, Open-File Report 94-84
Partitioning of zinc among common ferromagnesian minerals and implications for hydrothermal mobilization
C. A. Johnson
1994, Canadian Mineralogist (32) 121-132
In systems where metals are scavenging from crystalline rocks by through-flowing fluids, the important host minerals must be dissolved or must undergo cation-exchange reactions with the fluid. Whereas copper resides in sulfides, zinc resides in magnetic and, to a lesser extent, in biotite, clinopyroxene and olivine. Magnetite is known from...
Development of saline seeps in Southwestern United States
Kenneth S. Johnson
Anon, editor(s)
1994, Conference Paper, National Conference Publication - Institution of Engineers, Australia
Saline seeps are an increasingly serious problem in semi-arid regions of the southwestern United States. They result when excessive recharge of the shallow ground water in soils raises the water table locally to within one meter of the land surface, and the salinity of the shallow water is increased through...
Testing and comparison of four ionic tracers to measure stream flow loss by multiple tracer injection
G. W. Zellweger
1994, Hydrological Processes (8) 155-165
The ionic tracers lithium, sodium, chloride and bromide were used to measure flow loss in a small stream (≈︁ 10 ls−1). An injectate containing all four tracers was added continuously at five sites along a 507 m study reach of St Kevin Gulch, Lake County, Colorado to determine which sections...
Cenozoic climate and paleogeographic changes in the Pacific region
T. M. Cronin, K. Ogasawara, J. A. Wolfe
1994, Palaeogeography, Palaeoclimatology, Palaeoecology (108) 195-555
This special issue represents the proceedings of the symposium, held as part of the 29th International Geological Congress, 1992. Other relevant papers on Cainozoic climate change in Japan are also included. Data is assembled from the Pacific Ocean itself, its marginal seas, in particular the Sea of Japan, and the...
Geochemistry of the 1989-1990 eruption of redoubt volcano: Part II. Evidence from mineral and glass chemistry
S.E. Swanson, C.J. Nye, T. P. Miller, V.F. Avery
1994, Journal of Volcanology and Geothermal Research (62) 453-468
Early stages (December 1989) of the 1989-1990 eruption of Redoubt Volcano produced two distinct lavas. Both lavas are high-silica andesites with a narrow range of bulk composition (58-64 wt.%) and similar mineralogies (phenocrysts of plagioclase, hornblende, augite, hypersthene and FeTi oxides in a groundmass of the same phases plus glass)....
The Reporoa Caldera, Taupo Volcanic Zone: source of the Kaingaroa Ignimbrites
I.A. Nairn, C.P. Wood, R. A. Bailey
1994, Bulletin of Volcanology (56) 529-537
The Reporoa Caldera occupies the northern end of the Reporoa Depression, previously described as a tectonic fault-angle depression. Earlier confirmation of the topographic basin as a caldera had been hindered by the lack of an associated young pyroclastic flow deposit of large enough volume to have caused caldera collapse. New...
Rare earth element contents and multiple mantle sources of the transform-related Mount Edgecumbe basalts, southeastern Alaska
J.R. Riehle, J. R. Budahn, M. A. Lanphere, D. A. Brew
1994, Canadian Journal of Earth Sciences (31) 852-864
Pleistocene basalt of the Mount Edgecumbe volcanic field (MEF) is subdivided into a plagioclase type and an olivine type. Olivine basalt crops out farther inboard from the nearby Fairweather transform than plagioclase basalt. Th/La ratios of plagioclase basalt are similar to those of mid-ocean-ridge basalt (MORB), whereas those of olivine...
Formation and transport of deethylatrazine and deisopropylatrazine in surface water
E.M. Thurman, M. T. Meyer, M. S. Mills, L.R. Zimmerman, C. A. Perry, D. A. Goolsby
1994, Environmental Science & Technology (28) 2267-2277
No abstract available. ...
Disruption of Drift glacier and origin of floods during the 1989-1990 eruptions of Redoubt Volcano, Alaska
D.C. Trabant, R. B. Waitt, J. J. Major
1994, Journal of Volcanology and Geothermal Research (62) 369-385
Melting of snow and glacier ice during the 1989–1990 eruption of Redoubt Volcano caused winter flooding of the Drift River. Drift glacier was beheaded when 113 to 121 × 106 m3 of perennial snow and ice were mechanically entrained in hot-rock avalanches and pyroclastic flows initiated by the four largest eruptions between...
Galileo Photometry of Asteroid 951 Gaspra
P. Helfenstein, J. Veverka, P.C. Thomas, D.P. Simonelli, P. Lee, K. Klaasen, T. V. Johnson, H. Breneman, J.W. Head, S. Murchie, F. Fanale, M. Robinson, B. Clark, J. Granahan, H. Garbeil, A. S. McEwen, Randolph L. Kirk, M. Davies, G. Neukum, S. Mottola, R. Wagner, M. Belton, C. Chapman, C. Pilcher
1994, Icarus (107) 37-60
Galileo images of Gaspra make it possible for the first time to determine a main-belt asteroid's photometric properties accurately by providing surface-resolved coverage over a wide range of incidence and emission angles and by extending the phase angle coverage to phases not observable from Earth. We combine Earth-based telescopic photometry...
Geochemistry and solid-phase association of chromium in sediment from the Calcasieu River and estuary, Louisiana, U.S.A.
N.S. Simon, C. Demas, W. d'Angelo
1994, Chemical Geology (116) 123-135
Sediment samples were collected from the lower Calcasieu River and estuary, Louisiana, in a study of the release of metals from sediments to the overlying water column. Whole samples were characterized by analyses that included: (1) determination of total sediment ammonium concentrations; (2) determination of total sediment Cr, Mn and...
Hogtuvaite, a new beryllian member of the aenigmatite group from Norway, with new X-ray data on aenigmatite
R. I. Grauch
1994, Canadian Mineralogist (32) 439-448
Hogtuvaite is a new beryllian member of the aenigmatite group that was discovered in Nordland County, Norway. It is a metamorphic mineral, hosted by Proterozoic granitic gneisses and mafic pegmatites of metamorphic origin. Compositional variations within and between gneiss-hosted samples of hogtuvaite are minimal; however, pegmatite-hosted samples of hogtuvaite are...
Petroleum habitat of east Siberia, Russia
J. W. Clarke
1994, International Geology Review (36) 238-249
East Siberia comprises three petroleum provinces—Lena-Tunguska, Lena-Vilyuy, and Yenisey-Anabar—that occupy the area of the Siberian craton. Petroleum has been generated and has accumulated in Precambrian rifts beneath the sedimentary basins and, more importantly, within the section of the basin itself. The platformal deposits of the basins extend beneath...
Miller City levee break and incipient meander cutoff
K. A. Oberg, R. B. Jacobson
1994, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
On July 15, 1993, the flooding Mississippi River broke through a levee near Miller City, Ill., at the head of the Mississippi Embayment, approximately 55 km upstream from Cairo, Ill. Flow through the break crossed a high-amplitude meander bend and reentered the main channel approximately 24 km upstream from Cairo,...
Maps showing platinum-group-element occurrences in the conterminous United States, updated as of 1993
J.A. Peterson
1994, Miscellaneous Field Studies Map 2270
Use of long-term tritium records from the Colorado River to determine timescales for hydrologic processes associated with irrigation in the Imperial Valley, California
Robert L. Michel, R.A. Schoeder
1994, Applied Geochemistry (9) 387-401
Tritium records were used to study hydrologic processes associated with irrigation and drainage in the Imperial Valley, a 2000-km2 agricultural area in the southeastern California desert. Tritium was analyzed in surface water, ground water, soil-pore water and drain water, and the results were compared to the historical record of tritium in...
Deglaciation, lake levels, and meltwater discharge in the Lake Michigan basin
Steven M. Colman, J.A. Clark, L. Clayton, A.K. Hansel, C.E. Larsen
1994, Quaternary Science Reviews (13) 879-890
The deglacial history of the Lake Michigan basin, including discharge and routing of meltwater, is complex because of the interaction among (1) glacial retreats and re-advances in the basin (2) the timing of occupation and the isostatic adjustment of lake outlets and (3) the depositional and erosional processes that left...
Short-term cold storage of Atlantic sturgeon sperm
M. N. DiLauro, W. F. Krise, M. A. Hendrix, S.E. Baker
1994, Progressive Fish-Culturist (56) 143-144
Short‐term cold storage of fish sperm with oxygen, an established fisheries technique, was successfully used to preserve milt from Atlantic sturgeon (Acipenser oxyrhynchus oxyrhynchus). All milt samples stored for 5 d on ice and replenished daily with oxygen retained at least 80% motility and at least 99% viability. One sample...
Cryovolcanism on the icy satellites
J.S. Kargel
1994, Earth, Moon and Planets (67) 101-113
Evidence of past cryovolcanism is widespread and extremely varied on the icy satellites. Some cryovolcanic landscapes, notably on Triton, are similar to many silicate volcanic terrains, including what appear to be volcanic rifts, calderas and solidified lava lakes, flow fields, breached cinder cones or stratovolcanoes, viscous lava domes, and sinuous...
