CHANNEL EVOLUTION IN MODIFIED ALLUVIAL STREAMS.
Andrew Simon, Cliff R. Hupp
1987, Transportation Research Record 16-24
This study (a) assesses the channel changes and network trends of bed level response after modifications between 1959 and 1972 of alluvial channels in western Tennessee and (b) develops a conceptual model of bank slope development to qualitatively assess bank stability and potential channel widening. A six-step, semiquantitative model of...
An unusual pleomorphic sarcoma in a hybrid mallard
Thomas J. Roffe
1987, Journal of Wildlife Diseases (23) 334-337
An unusual pleomorphic sarcoma from a hybrid mallard (Anas platyrhynchos) is described. Rhabdomyosarcoma was considered in the original differential diagnoses but rejected due to lack of specific characteristics generally seen in these tumors. The histologic characteristics described are consistent with mammalian sarcomas recorded in the literature as malignant fibrous histiocytoma....
Dynamics of Mojave Desert shrub assemblages in the Panamint Mountains, California.
Robert Webb, John W. Steiger, Raymond M. Turner
1987, Ecology (68) 478-490
We studied shrub communities in the Panamint Mountains of the Mojave Desert to determine whether vegetational changes after disturbance can be characterized as succession according to modern successional theory. We found, on a variety of disturbed and undisturbed sites, that the rate of change was a function of the type...
Computer simulations of large asteroid impacts into oceanic and continental sites--Preliminary results on atmospheric, cratering and ejecta dynamics
D. J. Roddy, S.H. Schuster, M. Rosenblatt, L.B. Grant, Paul J. Hassig, K.N. Kreyenhagen
1987, International Journal of Impact Engineering (5) 525-541
Computer simulations have been completed that describe passage of a 10-km-diameter asteroid through the Earth's atmosphere and the subsequent cratering and ejecta dynamics caused by impact of the asteroid into both oceanic and continental sites. The asteroid was modeled as...
BOREHOLE NEUTRON ACTIVATION: THE RARE EARTHS.
J.L. Mikesell, F. E. Senftle
1987, IEEE Transactions on Nuclear Science (35)
Neutron-induced borehole gamma-ray spectroscopy has been widely used as a geophysical exploration technique by the petroleum industry, but its use for mineral exploration is not as common. Nuclear methods can be applied to mineral exploration, for determining stratigraphy and bed correlations, for mapping ore deposits, and for studying mineral concentration...
Isolation of nonvolatile, organic solutes from natural waters by zeotrophic distillation of water from N,N-dimethylformamide
J.A. Leenheer, P.A. Brown, E.A. Stiles
1987, Analytical Chemistry (59) 1313-1319
Nonvolatile, organic solutes that comprise the dissolved organic carbon (DOC) in saline waters were isolated by removal of the water by distillation from a N,N-dimethylformamideformic acid-acetonitrile mixture. Salts isolated with the DOC were removed by crystallization of sodium chloride and sodium sulfate from the solvent mixture, removal of silicic acid...
Hydrogeologic controls of surface-water chemistry in the Adirondack region of New York State
N.E. Peters, C. T. Driscoll
1987, Biogeochemistry (3) 163-180
Relationships between surface-water discharge, water chemistry, and watershed geology were investigated to evaluate factors affecting the sensitivity of drainage waters in the Adirondack region of New York to acidification by atmospheric deposition. Instantaneous discharge per unit area was derived from relationships between flow and staff-gage readings at 10 drainage basins...
Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A.
Anna Hietanen
1987, Geological Society of Finland, Bulletin (59) 91-95
Tourmaline (dravite) from a layered two-plagioclase anorthosite in the Boehls Butte quadrangle, Idaho, has the following structural formula: (Na0.55Ca0.17)0.72(Mg1.96Fe0.57Mn0.01Ti0.04V0.03Al0.47)3.08Al6(BO3)3.02Si5.98O18(OH,F)3.35. The indices of refraction are ω = 1.647(1) and ε = 1.621(1), and the unit cell parameters are a = 15.9425(6) and c = 7.1883(3)....
Heat capacity measurements for cryolite (Na3AlF6) and reactions in the system NaFeAlSiOF
Lawrence M. Anovitz, B. S. Hemingway, E.F. Westrum Jr., G.W. Metz, E.J. Essene
1987, Geochimica et Cosmochimica Acta (51) 3087-3103
The heat capacity of cryolite (Na3AlF6) has been measured from 7 to 1000 K by low-temperature adiabatic and high-temperature differential scanning calorimetry. Low-temperature data were obtained on material from the same hand specimen in the calorimetric laboratories of the University of Michigan and U.S. Geological Survey. The results obtained are...
Industrial halide wastes cause acute mortality of snow geese in Oklahoma
J. K. Andreasen, Richard K. Stroud
1987, Environmental Toxicology and Chemistry (6) 291-293
An examination of 97 dead migratory waterfowl collected at an industrial facility showed that the birds had had severe gastric and intestinal hemorrhaging. Water samples taken at on-site waste lagoons contained 6,750 mg/L fluoride, 4,500 mg/L bromine and 1,500 mg/L boron. Brain and liver tissues contained high levels of fluoride,...
Labeling Projections on Published Maps
John P. Snyder
1987, American Cartographer (14) 21-27
To permit accurate scaling on a map, and to use the map as a source of accurate positions in the transfer of data, certain parameters - such as the standard parallels selected for a conic projection - must be stated on the map. This information is often missing on published...
FUTURE APPLICATIONS OF EXPERT SYSTEMS FOR THE EVALUATION OF ENERGY RESOURCES.
B.M. Miller
1987, Conference Paper, Society of Petroleum Engineers of AIME, (Paper) SPE
The loss of professional experience and expertise in the domain of the earth sciences may prove to be one of the most serious outcomes of the boom-and-bust cyclic nature of the volatile energy and mining industries. Promising new applications of powerful computer systems, known as 'expert systems' or 'knowledge-based systems',...
Wolfcampian brachiopods from the Bird Spring Group, Wamp Spring area, Las Vegas Range, Clark County, Nevada
P. C. Mills, R.L. Langenheim Jr.
1987, Journal of Paleontology (61) 32-55
The Wamp Spring section of the Bird Spring Group consists of approximately 1,600 feet of carbonate rocks subdivided into a basal platy limestone member, lower cliff-forming member, and upper cliff-forming member. Triticites, Schwagerina, and Schubertella kingi in the platy limestone member indicate an early Wolfcampian age. Schwagerina, Schubertella...
Redescription of Spirodentalium Walcott (Gastropoda: Late Cambrian) from Wisconsin
E. L. Yochelson
1987, Journal of Paleontology (61) 66-69
Spirodentalium Walcott, 1890, was originally described as a scaphopod. A reinterpretation of the type lot suggests that its overall shape is that of an open-coiled gastropod. If so, this is probably the earliest known open-coiled form and it is sinistral in coiling direction....
LEACHATE MIGRATION FROM A SOLID WASTE DISPOSAL FACILITY NEAR BISCAYNE NATIONAL PARK, SOUTH FLORIDA.
Bradley G. Waller, James L. Labowski
1987, Conference Paper
Leachate from the Dade County Solid Waste Disposal Facility (SWDF) is migrating to the east (seaward) and to the south from the currently active disposal cell. Water levels and ground-water flow directions are strongly influenced by water-management practices. The SWDF is constructed over the salt-intruded part of the highly transmissive...
Significance of non-isotropic scattering from vegetation for geobotanical remote sensing
John W. Salisbury, N.M. Milton, P.A. Walsh
1987, International Journal of Remote Sensing (8) 997-1009
Although it has been known for quite some time that individual leaves display non-Lambertian scattering at wavelengths of strong absorption in the visible part of the spectrum, while displaying near-Lambertian behaviour at wavelengths of little absorption in the near-infrared, this is widely ignored in geobotanical remote sensing investigations. Preliminary data...
FeTi oxide mineralogy and the origin of normal and reverse remanent magnetization in dacitic pumice blocks from Mt. Shasta, California
C.A. Lawson, Gordon L. Nord Jr., D.E. Champion
1987, Physics of the Earth and Planetary Interiors (46) 270-288
Detailed mineralogical analyses and rock magnetic experiments have made it possible to directly identify the FeTi oxide phases responsible for the normal and reverse magnetic components of two dacitic pumice blocks from Mt. Shasta, California. Both samples contain a normal component carried by 100 ??m size multi-domain (MD) titanomagnetite (Usp11-24)....
Fluorescence spectral analysis of resinite macerals from coals of the Hanna Formation, Wyoming, U.S.A.
S.C. Teerman, J.C. Crelling, G.B. Glass
1987, International Journal of Coal Geology (7) 315-334
Flourescence spectral analysis indicates that resinite macerals from Tertiary Hanna Formation coals (Hanna Coal Field, southcentral Wyoming, U.S.A.) can be separated into five distinct groups. The first resinite group fluoresces a a medium green (in blue light); its average spectral maximum...
Origin of coffinite in sedimentary rocks by a sequential adsorption-reduction mechanism.
Martin B. Goldhaber, B. S. Hemingway, A. Mohagheghi, R. L. Reynolds, H. R. Northrop
1987, Bulletin de Mineralogie (110) 131-144
Coffinite is the dominant ore mineral in the V-U ores of the Tony-M mine in the Henry Mts mineral belt of the Colorado Plateau. This orebody was formed at a density-stratified solution interface between uranyl-ion-bearing meteoric water and a saline fluid which was locally reducing. The localization of U at...
Determination of alkylbenzenesulfonate surfactants in groundwater using macroreticular resins and carbon-13 nuclear magnetic resonance spectrometry
E. Michael Thurman, T. Willoughby, Larry B. Barber, Kevin A. Thorn
1987, Analytical Chemistry (59) 1798-1802
Alkylbenzenesulfonate surfactants were determined in groundwater at concentrations as low as 0.3 mg/L. The method uses XAD-8 resin for concentration, followed by elution with methanol, separation of anionic and nonionic surfactants by anion exchange, quantitation by titration, and identification by 13C nuclear magnetic resonance spectrometry. Laboratory standards and field samples...
A review of applications of U-Th-Pb isotope systematics to investigations of uranium source rocks.
J. S. Stuckless
1987, Uranium (3) 235-244
U, Th and Pb concentrations and the isotopic composition of Pb can be used to evaluate crystalline rocks as a source for U in sedimentary deposits. Under favourable geologic circumstances, the technique can yield information on both the timing and the amount of U released to the sedimentary environment. The...
Computation of unsteady flows in the Alabama River
Hillary H. Jeffcoat, Marshall E. Jennings
1987, Water Resources Bulletin (23) 313-315
An application is described of the branch-network flow model, BRANCH, to the upper Alabama River system in central Alabama. The model is used to simulate one-dimensional unsteady flows and water surface elevations in approximately 60 river miles of the Alabama River system. Preliminary calibration was made using 72 hours of...
Regional unconformities cored on the New Jersey continental slope
C. Wylie Poag, Doris Low
Charles A. Ross, Drew Haman, editor(s)
1987, Book chapter
No abstract available....
A review of light-scattering techniques for the study of colloids in natural waters
T.F. Rees
1987, Journal of Contaminant Hydrology (1) 425-439
In order to understand the movement of colloidal materials in natural waters, we first need to have a means of quantifying their physical characteristics. This paper reviews three techniques which utilize light-scattering phenomena to measure the translational diffusion coefficient, the rotational...
An automated technique for flow measurements from mariotte reservoirs
Jim Constantz, Fred Murphy
1987, Soil Science Society of America Journal (51) 252-254
The mariotte reservoir supplies water at a constant hydraulic pressure by self-regulation of its internal gas pressure. Automated outflow measurements from mariotte reservoirs are generally difficult because of the reservoir's self-regulation mechanism. This paper describes an automated flow meter specifically designed for use with mariotte reservoirs. The flow meter monitors...
