DISCRIMINATION OF ALTERED BASALTIC ROCKS IN THE SOUTHWESTERN UNITED STATES BY ANALYSIS OF LANDSAT THEMATIC MAPPER DATA.
Philip A. Davis, Graydon L. Berlin, Pat S. Chavez
1987, Photogrammetric Engineering and Remote Sensing (53) 45-55
Landsat Thematic Mapper image data were analyzed to determine their ability to discriminate red cone basalts from gray flow basalts and sedimentary country rocks for three volcanic fields in the southwestern United States. Analyses of all of the possible three-band combinations of the six nonthermal bands indicate that the combination...
Processes and kinetics of Cd2+ sorption by a calcareous aquifer sand
C. C. Fuller, J.A. Davis
1987, Geochimica et Cosmochimica Acta (51) 1491-1502
The rate of Cd2+ sorption by a calcareous aquifer sand was characterized by two reaction steps, with the first step reaching completion in 24 hours. The second step proceeded at a slow and nearly constant rate for at least seven days. The first step includes a fast adsorption reaction which...
PHYSICAL MODELING OF CONTRACTED FLOW.
Jonathan K. Lee
1987, Conference Paper
Experiments on steady flow over uniform grass roughness through centered single-opening contractions were conducted in the Flood Plain Simulation Facility at the U. S. Geological Survey's Gulf Coast Hydroscience Center near Bay St. Louis, Miss. The experimental series was designed to provide data for calibrating and verifying two-dimensional, vertically averaged...
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...
Seafloor gas seeps triggered by a northern California earthquake
M.E. Field, A. E. Jennings
1987, Marine Geology (77) 39-51
A series of marine surveys using high-resolution seismic-reflection and side-scan sonar profiling was conducted on the Klamath River delta from 1977 to 1985. In November 1980, near the middle of this 8-year time period, a major earthquake (magnitude 7) occurred in...
Geology of the Blue Mountains region of Oregon, Idaho, and Washington; the Idaho Batholith and its border zone
T.L. Vallier, Howard C. Brooks, editor(s)
1987, Professional Paper 1436
No abstract available....
U.S. Geological Survey: earth science in the public service
Water Resources Division, U.S. Geological Survey
1987, Report
No abstract available....
Diffusivity of a glacial-outwash aquifer by the floodwave- response technique
R.J. Reynolds
1987, Groundwater (25) 290-299
Aquifer diffusivity (transmissivity divided by storage coefficient) was calculated for three sites in a glacial-autwash valley aquifer near Cortland, New York from water-level fluctuations induced by rises in stream stage. The observed response data were analyzed through use of a one-dimensional floodwave-response model to calculate the theoretical head response in...
The geochemistry of water near a surficial organic-rich uranium deposit, northeastern Washington State, U.S.A.
R. A. Zielinski, J. K. Otton, R. B. Wanty, C. T. Pierson
1987, Chemical Geology (62) 263-289
The chemistry of three stream, three spring and six near-surface waters in the vicinity of a Holocene organic-rich uranium deposit is described, with particular emphasis on the chemistry of U. Results characterize the solution behavior of uranium as U-bearing water interacts with relatively undecomposed, surficial organic matter. Of the measured...
Convergent tectonics and coastal upwelling: a history of the Peru continental margin ( Pacific).
Roland E. von Huene, E. Suess, K.C. Emeis
1987, Episodes (10) 87-93
Late in 1986, scientists on the ODP drillship JOIDES Resolution confirmed that the upper slope of the Peruvian margin consists of continental crust whereas the lower slope comprises an accretionary complex. An intricate history of horizontal and vertical movements can be detected, and the locations of ancient centers of upwelling...
Plate-tectonic evolution of the western U.S.A.
W. Hamilton
1987, Episodes (10) 271-276
Changing interactions of lithospheric plates provide the framework for this review of the 3100 m.y. geological history of some 3 million km2 of mountains, deserts, plateaux and plains. The Precambrian to Neogene development of the western U.S.A. is outlined in terms of plate collisions, subduction events and deformation of lithospheric...
Comparison of Methods for Estimating Low Flow Characteristics of Streams
Gary D. Tasker
1987, Water Resources Bulletin (23) 1077-1083
Four methods for estimating the 7-day, 10-year and 7-day, 20-year low flows for streams are compared by the bootstrap method. The bootstrap method is a Monte Carlo technique in which random samples are drawn from an unspecified sampling distribution defined from observed data. The nonparametric nature of the bootstrap makes...
Evolution and petroleum geology of Amlia and Amukta intra-arc summit basins, Aleutian Ridge
E.L. Geist, J.R. Childs, D.W. Scholl
1987, Marine and Petroleum Geology (4) 334-352
Amlia and Amukta Basins are the largest of many intra-arc basins formed in late Cenozoic time along the crest of the Aleutian Arc. Both basins are grabens filled with 2-5 km of arc-derived sediment. A complex system of normal faults deformed the basinal strata. Although initial deposits of late Micocene...
Application of microwave digestion to the analysis of peat
C. S.E. Papp, L. B. Fischer
1987, The Analyst (112) 337-338
A microwave digestion technique for the dissolution of peat is described and compared with a dry ashing method and a nitric - perchloric - hydrofluoric acid wet digestion. Peat samples with different organic matter contents were used and Ca, Mg, Fe, AI, Na, K, Mn, Zn, Cu and Li were...
Sedimentary processes on the northwestern Iberian continental margin viewed by long-range side-scan sonar and seismic data
James V. Gardner, Robert B. Kidd
1987, Journal of Sedimentary Petrology (57) 397-407
The effects of an eastern boundary current in the North Atlantic have been mapped from about 39° north latitude along the Iberian margin to as far north as 43°30 north latitude at the western margin of Galicia Bank. The geostrophic current has produced sediment drifts that are...
Phase relations in the system NaCl-KCl-H2O. III: Solubilities of halite in vapor-saturated liquids above 445°C and redetermination of phase equilibrium properties in the system NaCl-H2O to 1000°C and 1500 bars
I.-M. Chou
1987, Geochimica et Cosmochimica Acta (51) 1965-1975
Halite solubilities along the three-phase curve in the binary system NaCl-H2O determined by DTA experiment can be represented by the equation Wt.% NaCl (±0.2) = 19.39 − 0.0364t + 3.553 × 10−4T2 − 2.298 × 10−7T3, where 447≦ T ≦ 800°C. Even though these halite solubilities are up to ~7 wt.% higher than...
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...
Gray whale and walrus feeding excavation on the Bering Shelf, Alaska
C.H. Nelson, K.R. Johnson, J. H. Barber Jr.
1987, Journal of Sedimentary Petrology (57) 419-430
Sidescan sonar has been used to delineate benthic feeding structures of the California gray whale ( Eschrichtius robustus ) and Pacific walrus ( Odobenus rosmarus divergens ) on the northeastern Bering Shelf. The gray whales (average mouth length, 2.0 m), when suction feeding...
Petrogenesis of gabbronorite at Yakobi and northwest Chichagof Islands, Alaska
G. R. Himmelberg, R. A. Loney, P.I. Nabelek
1987, Geological Society of America Bulletin (98) 265-279
On Yakobi Island and at Mirror Harbor on the northwest coast of Chichagof Island, gabbronorite occurs as irregular bodies, as much as 5.5 km in maximum dimension, mostly within a 40 to 43 m.y. composite pluton consisting largely of tonalite. The gab-bronorites are the host rocks for a magmatic nickel-copper...
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...
Geothermometry of Kilauea Iki lava lake, Hawaii
Rosalind Tuthill Helz, C.R. Thornber
1987, Bulletin of Volcanology (49) 651-668
Data on the variation of temperature with time and in space are essential to a complete understanding of the crystallization history of basaltic magma in Kilauea Iki lava lake. Methods used to determine temperatures in the lake have included direct, downhole thermocouple measurements and Fe-Ti oxide geothermometry. In addition, the...
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...
A model for tides and currents in the English Channel and southern North Sea
Roy A. Walters
1987, Conference Paper, Advances in Water Resources
The amplitude and phase of 11 tidal constituents for the English Channel and southern North Sea are calculated using a frequency domain, finite element model. The governing equations - the shallow water equations - are modifed such that sea level is calculated using an elliptic equation of the Helmholz type...
Benthic foraminifera of the Panamanian Province: distribution and origins.
R.W. Crouch, C. W. Poag
1987, Journal of Foraminiferal Research (17) 153-176
Two hundred twenty-nine species of benthic foraminifera have been identified from 96 stations representing 33 localities on the eastern Pacific inner continental shelf, ranging from southern Peru to northern Baja California. Their distributions mark nearshore provincial boundaries that are nearly identical with those previously documented from the distribution of ostracodes...
Variable delay miniservo-control unit
M.A. Uhrich
1987, WRD Instrument News
No abstract available. ...
