Preliminary appraisal of ground water in and near the ancestral Missouri River Valley, northeastern Montana
G. W. Levings
1986, Water-Resources Investigations Report 86-4138
A preliminary appraisal was conducted in and near the ancestral Missouri River valley in northeastern Montana to describe the groundwater resources and to establish a data base for the area. The data base then could be used for future evaluation of possible changes in water levels or water quality. In...
Hydrogeology and ground-water quality of Lannon-Sussex area, northeastern Waukesha County, Wisconsin
R. D. Cotter
1986, Water-Resources Investigations Report 84-4213
The Silurian dolomite aquifer in the Lannon-Sussex area of southeastern Wisconsin is overlain by glacial deposits, but is within 8 ft of the land surface over 15% of the study area. The proximity of the dolomite aquifer to the land surface makes it susceptible to contamination from man 's activities....
Effects of urbanization on streamflow, sediment loads, and channel morphology in Pheasant Branch basin near Middleton, Wisconsin
W.R. Krug, G. L. Goddard
1986, Water-Resources Investigations Report 85-4068
A 5-year, data-collection and modeling study was conducted on Pheasant Branch basin in and near Middleton, Wisconsin. The objectives of the study were to: (1) describe the streamflow characteristics, sediment transport, and stream-channel morphology in the Pheasant Branch basin; and (2) relate the above factors to changes caused by urbanization...
Determination of Ca, Mg, Na, Cd, Cu, Fe, K, Li and Zn in acid mine and reference water samples by inductively coupled plasma atomic fluorescence spectrometry
R. F. Sanzolone, A. L. Meier
1986, The Analyst (111) 645-649
An inductively coupled plasma atomic fluorescence spectrometric (ICP-AFS) method was used for the determination of nine elements in natural water. Reference and acid mine water samples were analysed by this method to demonstrate its usefulness for hydrogeochemical exploration. The elements were determined in two groups based on the compatibility of...
EFFECTS OF ARTIFICIAL RECHARGE ON GROUND-WATER QUALITY, LONG ISLAND, NEW YORK.
Brian J. Schneider, Henry F. H. Ku, Edward T. Oaksford
1986, Conference Paper
Artificial-recharge experiments were conducted at East Meadow in central Nassau County, Long Island, N. Y. , from October 1982 through January 1984, to evaluate the degree of ground-water mounding and chemical effects of artificially replenishing the ground-water system with tertiary-treated wastewater. Reclaimed water was provided by the Cedar Creek wastewater-treatment...
FLOOD REDUCTION EFFICIENCY OF THE WATER-MANAGEMENT SYSTEM IN DADE COUNTY (MIAMI), FLORIDA.
Bradley G. Waller
1986, Conference Paper
Two tropical weather systems, Hurricane Donna (1960) and Tropical Storm Dennis (1981), produced nearly equivalent amounts of rainfall in a 48-hour period south of the Miami (Florida) area. These two systems caused extensive flooding over a 600-square mile area, which is primarily agricultural and low density residential. The 1960 and...
Regression approximations for transport model constraint sets in combined aquifer simulation-optimization studies
William M. Alley
1986, Water Resources Research (22) 581-586
Problems involving the combined use of contaminant transport models and nonlinear optimization schemes can be very expensive to solve. This paper explores the use of transport models with ordinary regression and regression on ranks to develop approximate response functions of concentrations at critical locations as a function of pumping and...
Dissolved organic matter in anoxic pore waters from Mangrove Lake, Bermuda
W. H. Orem, Patrick G. Hatcher, E.C. Spiker, N.M. Szeverenyi, G.E. Maciel
1986, Geochimica et Cosmochimica Acta (50) 609-618
Dissolved organic matter and dissolved inorganic chemical species in anoxic pore water from Mangrove Lake, Bermuda sediments were studied to evaluate the role of pore water in the early diagenesis of organic matter. Dissolved sulphate, titration alkalinity, phosphate, and ammonia concentration versus depth profiles were typical of many nearshore clastic sediments and...
Seismically induced landslides: current research by the US Geological Survey.
E. L. Harp, R. C. Wilson, D. K. Keefer, G. F. Wieczorek
1986, Geologia Applicata e Idrogeologia (21) 159-173
We have produced a regional seismic slope-stability map and a probabilistic prediction of landslide distribution from a postulated earthquake. For liquefaction-induced landslides, in situ measurements of seismically induced pore-water pressures have been used to establish an elastic model of pore pressure generation. -from Authors...
The Schwarzwalder uranium deposit, III: Alteration, vein mineralization, light stable isotopes, and genesis of the deposit
A. R. Wallace, J. F. Whelan
1986, Economic Geology (81) 872-888
The Schwartzwalder uranium deposit formed at 69.3 + or - 1.1 m.y. in a complex fracture system during the inception of Laramide uplift of the Front Range in Colorado. Geologic and isotopic evidence demonstrates that the ore-forming fluids were in chemical equilibrium with the Proterozoic metavolcanic and metasedimentary host-rock terrane...
Tidal reorientation and the fracturing of Jupiter's moon Europa
A. S. McEwen
1986, Nature (321) 49-51
The most striking characteristic of Europa is the network of long linear albedo markings over the surface, suggestive of global-scale tectonic processes. Various explanations for the fractures have been proposed: Freezing and expansion of an early liquid water ocean1, planetary expansion due to dehydration of hydrated silicates2, localization by weak...
Danburite in evaporites of the Paradox basin, Utah.
O. B. Raup, B.M. Madsen
1986, Journal of Sedimentary Petrology (56) 248-251
Danburite (CaB 2 Si 2 O 8 ) has been found as nodules in Pennsylvanian age marine evaporites of the Paradox basin, Utah. Originally danburite had been known as a high-temperature mineral that occurs at numerous localities in igneous and metamorphic rocks. Since its discovery in water-insoluble residues from...
Biomass and productivity of three phytoplankton size classes in San Francisco Bay
B.E. Cole, J. E. Cloern, A.E. Alpine
1986, Estuaries (9) 117-126
The 5-22 mu m size accounted for 40-50% of annual production in each embayment, but production by phytoplanton >22 mu m ranged from 26% in the S reach to 54% of total phytoplankton production in the landward embayment of the N reach. A productivity index is derived that predicts daily...
Oxygen isotope compositions of selected laramide-tertiary granitoid stocks in the Colorado Mineral Belt and their bearing on the origin of climax-type granite-molybdenum systems
J. L. Hannah, H. J. Stein
1986, Contributions to Mineralogy and Petrology (93) 347-358
Quartz phenocrysts from 31 granitoid stocks in the Colorado Mineral Belt yield ??18O values less than 10.4???, with most values between 9.3 and 10.4???. An average magmatic value of about 8.5??? is suggested. The stocks resemble A-type granites; these data support magma genesis by partial melting of previously depleted, fluorine-enriched,...
Borehole field calibration and measurement of low-concentration manganese by decay gamma rays
J.L. Mikesell, F. E. Senftle, T.A. Lloyd, A.B. Tanner, C.T. Merritt, E. R. Force
1986, Geophysics (51) 2219-2224
The manganese concentration in the Arundel clay formation, Prince Georges County, Maryland, was determined from a borehole by using delayed neutron activation. The neutrons were produced by a 100 mu g 252 Cf source. The 847 keV gamma ray of manganese was detected continuously, and its counting rate was measured at intervals...
Deformation of poorly consolidated sediment during shallow emplacement of a basalt sill, Coso Range, California
W. A. Duffield, C. R. Bacon, P.T. Delaney
1986, Bulletin of Volcanology (48) 97-107
A 150-m-long, wedge-shaped unit of folded and faulted marly siltstone crops out between undeformed sedimentary rocks on the north flank of the Coso Range, California. The several-meter-thick blunt end of this wedge abuts the north margin of a basaltic sill of comparable thickness. Chaotically deformed siltstone crops out locally at...
Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites
C.H. Nelson, A.W. Meyer, D. Thor, M. Larsen
1986, Geology (14) 238-241
The basin floor of Crater Lake (10-km diameter, 600-m water depth) is covered by up to 75 m of sediment–gravity-flow deposits interbedded with mud. In the upper units (8 m (thick), sand and gravel layers with numerous wedging, strong seismic reflectors characterize the...
THERMAL-ENERGY STORAGE IN A DEEP SANDSTONE AQUIFER IN MINNESOTA: FIELD OBSERVATIONS AND THERMAL ENERGY-TRANSPORT MODELING.
R. T. Miller
1986, Conference Paper, Proceedings of the Intersociety Energy Conversion Engineering Conference
A study of the feasibility of storing heated water in a deep sandstone aquifer in Minnesota is described. The aquifer consists of four hydraulic zones that are areally anisotropic and have average hydraulic conductivities that range from 0. 03 to 1. 2 meters per day. A preliminary axially symmetric, nonisothermal,...
A ground-water mixing model for the origin of the Imini manganese deposit (Cretaceous) of Morocco
E. R. Force, W. Back, E.C. Spiker, L.P. Knauth
1986, Economic Geology (81) 65-79
Three beds of manganese oxide ore in a 10 m-thick dolomite unit are associated with diagenetic features, and, are accordingly also diagenetic in their present aspect. Whether primary or introduced, the Mn mineralogy is attributed to reactions between fresh and saline ground-waters as the zone of mixing passed through the...
Application of seismic refraction methods in groundwater modeling studies in New England (USA)
F.P. Haeni
1986, Geophysics (51) 236-249
Seismic refraction studies were conducted over unconfined glacial aquifers in New England to determine: 1) depth of the underlying bedrock; 2) depth of the water table; 3) saturated thickness of the aquifer in areas not accessible to heavy drilling equipment; 4) areas where thick, unsaturated sediments overlie thickly saturated parts...
Comparison of methods for the concentration of suspended sediment in river water for subsequent chemical analysis
A.J. Horowltz
1986, Environmental Science & Technology (20) 155-160
No abstract available....
A fan dam for Tulare Lake, California, and implications for the Wisconsin glacial history of the Sierra Nevada
B.F. Atwater
1986, Geological Society of America Bulletin (97) 97-109
Historic fluctuations and late Quaternary deposits of Tulare Lake, in the southern San Joaquin Valley, indicate that maximum lake size has depended chiefly on the height of a frequently overtopped spillway. This dependence gives Tulare Lake a double record of paleoclimate. Climate in...
Gas-film coefficients for the volatilization of ethylene dibromide from water
R. E. Rathbun, D.Y. Tal
1986, Environmental Science & Technology (20) 949-952
Gas-film coefficients for the volatilization of ethylene dibromide (EDB) and water were determined in the laboratory as a function of wind speed and temperature. The ratio of the coefficients was independent of wind speed and increased slightly with temperature. Use of this ratio with an environmentally determined gas-film coefficient for...
Giant subtidal stromatolites forming in normal salinity waters
R.F. Dill, E.A. Shinn, A.T. Jones, K. Kelly, R.P. Steinen
1986, Nature (324) 55-58
We report here the discovery of giant lithified subtidal columnar stromatolites (>2 m high) growing in 7-8 m of clear oceanic water in current-swept channels between the Exuma Islands on the eastern Bahama Bank. They grow by trapping ooid and pelletal carbonate sand and synsedimentary precipitation of carbonate cement within...
Recovery of several volatile organic compounds from simulated water samples: Effect of transport and storage
L.C. Friedman, L.J. Schroder, M.G. Brooks
1986, Environmental Science & Technology (20) 826-829
No abstract available....
