Archean inheritance in zircon from late Paleozoic granites from the Avalon zone of southeastern New England: An African connection
R. E. Zartman, Hermes O. Don
1987, Earth and Planetary Science Letters (82) 305-315
In southeastern New England the Narragansett Pier Granite locally intrudes Carboniferous metasedimentary rocks of the Narragansett basin, and yields a monazite UPb Permian emplacement age of 273 ± 2Ma. Zircon from the Narragansett Pier Granite contains a...
Usefulness of weak bands in midinfrared remote sensing of particulate planetary surfaces
J.W. Salisbury, B. Hapke, J.W. Eastes
1987, Journal of Geophysical Research Solid Earth (92) 702-710
Midinfrared (2.5–25 μm) reflectance spectra of minerals are often used to predict emittance qualitatively. These spectra display weak overtone and combination tone bands, which may be as diagnostic of composition as the strong fundamental molecular vibration bands usually considered for remote sensing applications, but which have been widely ignored. However,...
The ubiquitous ostracode Darwinula stevensoni (Brady and Robertson, 1870), redescription of the species and lectotype designation.
I. G. Sohn
1987, Micropaleontology (33) 150-163
Darwinula stevensoni (Brady and Robertson 1870) is the type species of Darwinula, the ubiquitous living and fossil nonmarine nominate genus of the Darwinulidae and the Darwinulacea. To date, the additional families Darwinuloididae (fossil), Microdarwinulidae (living and fossil), Panxianidae (fossil), and Suchonellidae (fossil) have been referred to the Darwinulacea. A type...
Lungfish burrows in the Upper Triassic Chinle and Dolores Formations, Colorado Plateau
R. F. Dubiel, R.H. Blodgett, T. M. Bown
1987, Journal of Sedimentary Petrology (57) 512-521
Vertical-to-inclined, cylindrical trace fossils that occur in the Upper Triassic Chinle and Dolores Formations on the Colorado Plateau are interpreted to be the casts of lungfish burrows. The casts, which are as much as 11 cm in diameter and as much as 1.6...
LEAD, TIN, AND PRECIOUS-METAL MINERALIZATION IN THE U. S. VIRGIN ISLANDS.
H. V. Alminas, R. E. Tucker
1987, Conference Paper, Preprint - Society of Mining Engineers of AIME
This regional geochemical study of the U. S. Virgin Islands demonstrates the presence of a widespread base-metal (primarily Pb, Sn, Cu) and precious-metal (primarily Ag) mineralization on all three of the islands. The overall association: Au, Ag, Te, Sn, Pb, Cu, Zn, Sb, Bi, Mo, As and Ba shows a...
Landsat Image Map Production Methods at the U. S. Geological Survey
R.D. Kidwell, D.R. Binnie, S. Martin
1987, Journal of Imaging Technology (13) 93-96
To maintain consistently high quality in satellite image map production, the U. S. Geological Survey (USGS) has developed standard procedures for the photographic and digital production of Landsat image mosaics, and for lithographic printing of multispectral imagery. This paper gives a brief review of the photographic, digital, and lithographic procedures...
Molecular orbital (SCF-Xα-SW) theory of metal-metal charge transfer processes in minerals
David M. Sherman
1987, Physics and Chemistry of Minerals (14) 355-363
A number of mixed valence iron oxides and silicates (e.g., magnetite, ilvaite) exhibit thermally induced electron delocalization between adjacent Fe2+ and Fe3+ ions and optically induced electronic transitions which are assigned to Fe2+→Fe3+ intervalence charge transfer. In this paper, the mechanism of electron delocalization (i.e., polarons versus itinerant electrons) and the nature...
Stratification of a cityscape using census and land use variables for inventory of building materials
G.H. Rosenfield, K. Fitzpatrick-Lins, T. L. Johnson
1987, The Annals of Regional Science (21) 22-33
A cityscape (or any landscape) can be stratified into environmental units using multiple variables of information. For the purposes of sampling building materials, census and land use variables were used to identify similar strata. In the Metropolitan Statistical Area of a cityscape, the census tract is the smallest unit for...
Crustal and upper mantle structure of stable continental regions in North America and northern Europe
R.P. Masse
1987, Pure and Applied Geophysics PAGEOPH (125) 205-239
From an analysis of many seismic profiles across the stable continental regions of North America and northern Europe, the crustal and upper mantle velocity structure is determined. Analysis procedures include ray theory calculations and synthetic seismograms computed using reflectivity techniques. The P wave velocity structure beneath the Canadian Shield is...
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...
The solubilities of some major and minor element minerals in ground waters associated with a sandstone-hosted uranium deposit
Richard B. Wanty, J. R. Chatcham, D. Langmuir
1987, Bulletin de Mineralogie (110) 209-226
Ground-water samples from 41 wells penetrating basal Oakville sandstone (Miocene) in S Texas were chemically analysed to identify chemical changes related to nearby U orebodies. The coverage included a 240 km2 area which contains several fault-related U deposits. Factors affecting the hydrochemistry include: 1) relatively high permeabilities of buried fluvial-channel...
Evolution, biogeography, and systematics of Puriana: evolution and speciation in Ostracoda, III.
T. M. Cronin
1987, Journal of Paleontology (61)
Three types of geographic isolation—land barriers, deep water barriers, and climatic barriers—resulted in three distinct evolutionary responses in Neogene and Quaternary species of the epineritic ostracode genus Puriana. Through systematic, paleobiogeographic, and morphologic study of several hundred fossil and Recent populations from the eastern Pacific, western Atlantic,...
The line integral approach to radarclinometry
R.L. Wildey
1987, Earth, Moon and Planets (38) 59-95
Radarclinometry, the invention of which has been previously reported, is a technique for deriving a topographic map from a single radar image by using the dependence upon terrain-surface orientation of the integrated signal of an individual image pixel. The radiometric calibration required for precise operation and testing does not yet...
Kinetic theory of oxygen isotopic exchange between minerals and water
R.E. Criss, R. T. Gregory, H.P. Taylor Jr.
1987, Geochimica et Cosmochimica Acta (51) 1099-1108
Kinetic and mass conservation equations are used to describe oxygen isotopic exchange between minerals and water in "closed" and open hydrothermal systems. In cases where n coexisting mineral phases having different reaction rates are present, the exchange process is described by a system of n + 1 simultaneous differential equations...
A study of metal ion adsorption at low suspended-solid concentrations
Cecily C.Y. Chang, J.A. Davis, James S. Kuwabara
1987, Estuarine, Coastal and Shelf Science (24) 419-424
A procedure for conducting adsorption studies at low suspended solid concentrations in natural waters (<50 mg l−1) is described. Methodological complications previously associated with such experiments have been overcome. Adsorption of zinc ion onto synthetic colloidal titania (TiO2) was studied as a function...
Sea-floor gouges caused by migrating gray whales off northern California
D.A. Cacchione, D.E. Drake, M.E. Field, G. B. Tate
1987, Continental Shelf Research (7) 553-560
Side-scan sonar records collected during March and April 1981 and 1982 off northern California contain elongate depressions whose sizes and shapes are similar to sea-floor gouges made by feeding gray whales (Eschrichtius robustus) in the northern Bering Sea and in shallow embayments off British Columbia. The discovery of the whale...
Man-induced gradient adjustment of the South Fork Forked Deer River, west Tennessee
A. Simon, C. H. Robbins
1987, Environmental Geology and Water Sciences (9) 109-118
Channel modifications from 1968 to 1969 on the South Fork Forked Deer River in western Tennessee have caused upstream degradation, downstream aggradation, and bank failures along the altered channels, adjacent reaches, and tributaries. The result of these adjustments is a general decrease in gradient as the channel attempts to absorb...
Phytoplankton productivity in relation to light intensity: A simple equation
D. H. Peterson, M.J. Perry, K.E. Bencala, M.C. Talbot
1987, Estuarine, Coastal and Shelf Science (24) 813-832
A simple exponential equation is used to describe photosynthetic rate as a function of light intensity for a variety of unicellular algae and higher plants where photosynthesis is proportional to (1-e−β1). The parameter β (=Ik−1">=Ik−1) is derived by a simultaneous curve-fitting method, where I is incident...
Secondary hydroeruptions in pyroclastic-flow deposits: Examples from Mount St. Helens
T.C. Moyer, D. A. Swanson
1987, Journal of Volcanology and Geothermal Research (32) 299-319
Secondary hydroeruptions occur in pyroclastic-flow deposits when water or ice is trapped beneath hot pyroclastic debris and rapidly heated to steam. These eruptions display various styles of activity including fumarolic degassing, tephra fountaining, and explosive cratering. The deposits, which occupy the layer 3 stratigraphic position on the top of pyroclastic-flow...
Normal faulting of the Daiichi-Kashima Seamount in the Japan Trench revealed by the Kaiko I cruise, Leg 3
K. Kobayashi, J.-P. Cadet, J. Aubouin, J. Boulegue, J. Dubois, Roland E. von Huene, L. Jolivet, T. Kanazawa, J. Kasahara, K.-i. Koizumi, S. Lallemand, Y. Nakamura, G. Pautot, Kiyoshi Suyehiro, S. Tani, H. Tokuyama, T. Yamazaki
1987, Earth and Planetary Science Letters (83) 257-266
A detailed topographic and geophysical survey of the Daiichi-Kashima Seamount area in the southern Japan Trench, northwestern Pacific margin, clearly defines a high-angle normal fault which splits the seamount into two halves. A fan-shaped zone was investigated along 2–4 km spaced,...
Climatic implications of alternating clay and carbonate formation in semiarid soils of South-Central Montana
M.C. Reheis
1987, Quaternary Research (27) 270-282
Evidence for climatic change is found in petrographic thin sections from soils formed on glaciofluvial deposits of Rock Creek and the lower Clarks Fork, Montana. These soils, presently in a semiarid climate, range from late Pliocene to Holocene in age, and have undergone periodic fluctuations in soil moisture caused by...
Cadmium, copper, lead, and zinc determination in precipitation: A comparison of inductively coupled plasma atomic emission spectrometry and graphite furnace atomization atomic absorption spectrometry
M.M. Reddy, M.A. Benefiel, H.C. Claassen
1987, Mikrochimica Acta (88) 159-170
Selected trace element analysis for cadmium, copper, lead, and zinc in precipitation samples by inductively coupled plasma atomic emission Spectrometry (ICP) and by atomic absorption spectrometry with graphite furnace atomization (AAGF) have been evaluated. This task was conducted in conjunction with a longterm study of precipitation chemistry at high altitude...
Geologic map of the Handies Peak quadrangle, San Juan, Hinsdale and Ouray Counties, Colorado
Robert G. Luedke, Wilbur S. Burbank
1987, Geologic Quadrangle 1595
No abstract available....
Re-registration of rotenone: A state/federal cooperative effort
R.J. Sousa, F. P. Meyer, R. A. Schnick
1987, Fisheries (12) 9-13
Rotenone is an effective fish toxicant used by virtually all states to manage fish populations. In response to an allegation that rotenone might cause mammary tumors, the U.S. Environmental Protection Agency, in 1976, announced that it was considering listing rotenone as an unsafe substance. To determine if these allegations were...
Sedimentation in Lake Onalaska, Navigation Pool 7, Upper Mississippi River, since impoundment
C. E. Korschgen, G. A. Jackson, L.F. Muessig, D. Southworth
1987, Journal of the American Water Resources Association (23) 221-226
Sediment accumulation was evaluated in Lake Onalaska a 2800-ha backwater impoundment on the Upper Mississippi River. Computer programs were used to process fathometric charts and generate an extensive data set on water depth for the lake. Comparison of 1983 survey data with pre-impoundment (before 1937) data showed that Lake Onalaska...
