Mesozoic ash-flow caldera fragments in southeastern Arizona and their relation to porphyry copper deposits
P. W. Lipman, D.A. Sawyer
1985, Geology (13) 652-656
Jurassic and Upper Cretaceous volcanic and associated granitic rocks in southeast Arizona are remnants of large composite silicic volcanic fields, characterized by voluminous ash-flow tuffs and associated calderas. Presence of 10–15 large caldera fragments is inferred primarily from (1) ash-flow deposits more than...
U-Pb isotopic evidence for the accretion of a continental microplate in the Zalm region of the Saudi Arabian Shield.
J. S. Stacey, R.A. Agar
1985, Journal of the Geological Society (142) 1189-1203
This area includes three of the main tectonic units of the Arabian Shield: the Afif continental terrain, the Nabitah suture with its associated mobile belt, and the Asir ensimatic arc terrain. U/Pb zircon data from a pelitic garnet-sillimanite gneiss show that the Kabib formation in the S of the Afif...
The McKinley Sequence of granitic rocks: A key element in the accretionary history of southern Alaska
M. A. Lanphere, B.L. Reed
1985, Journal of Geophysical Research Solid Earth (90) 11413-11430
The McKinley sequence of granitic rocks consists of several discrete plutons in the central Alaska Range. Most of these plutons crop out south of the Denali fault system (DFS) in the Talkeetna quadrangle. Plutons of the McKinley sequence largely intrude deformed upper Meszoic flysch between the DFS and the northern...
Intraband radiometric performance of the Landsat Thematic Mappers.
H. H. Kieffer, D.A. Cook, E. M. Eliason, P.T. Eliason
1985, Photogrammetric Engineering and Remote Sensing (51) 1331-1350
Radiometric characteristics have been examined of the Landsat-4 and Landsat-5 Thematic Mappers (TMs) that can be established without absolute calibration of spectral data. This analysis is based on radiometrically and geometrically raw (B-type) data of both uniform (flat-field) and high-contrast scenes. Subscenes selected for uniform radiance were used to characterized...
The National Cartographic Information Center: An information resource on mapping products for the nation
Alan R. Stevens
1985, Science and Technology Libraries (5) 25-38
Since its inception in 1974 the National Cartographic Information Center (NCIC), U.S. Geological Survey, has rapidly developed to become a focial point for providing information on the availability of cartographic data, including maps/charts, aerial photographics, satellite imagery, geodetic control, digitial mapping data, map materials and related cartographic products. In early...
In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York
Stephen H. Hickman, John H. Healy, Mark D. Zoback
1985, Journal of Geophysical Research (90) 5497-5512
Hydraulic fracturing stress measurements and a borehole televiewer survey were conducted in a 1.6‐km‐deep well at Auburn, New York. This well, which was drilled at the outer margin of the Appalachian Fold and Thrust Belt in the Appalachian Plateau, penetrates approximately 1540 m of lower Paleozoic sedimentary rocks and terminates...
U. S. PHOSPHATE INDUSTRY: REVISED PROSPECTS AND POTENTIAL.
Vincent E. McKelvey
1985, Marine Technology Society Journal (19) 65-67
Although the United States is the world's largest producer and exporter of phosphates, serious doubts have arisen in recent years that U. S. deposits could sustain this important role. The development of borehole mining; i. e. , extracting the phosphate matrix as a slurry through a drill hole, however, is...
Removal of iron interferences by solvent extraction for geochemical analysis by atomic-absorption spectrophotometry
L. Zhou, T. T. Chao, R. F. Sanzolone
1985, Talanta (32) 475-478
Iron is a common interferent in the determination of many elements in geochemical samples. Two approaches for its removal have been taken. The first involves removal of iron by extraction with methyl isobutyl ketone (MIBK) from hydrochloric acid medium, leaving the analytes in the aqueous phase. The second consists of...
Benthic fluxes in San Francisco Bay
Douglas E. Hammond, C. Fuller, D. Harmon, Blayne Hartman, M. Korosec, L.G. Miller, R. Rea, S. Warren, W. Berelson, S.W. Hager
1985, Hydrobiologia (129) 69-90
Measurements of benthic fluxes have been made on four occasions between February 1980 and February 1981 at a channel station and a shoal station in South San Francisco Bay, using in situ flux chambers. On each occasion replicate measurements of easily measured substances such as radon, oxygen, ammonia, and silica...
Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology
Kaye M. Shedlock, Steven W. Roecker
1985, Bulletin of the Seismological Society of America (75) 415-426
An arrival time difference method utilizing refracted arrivals from earthquakes in a homogeneous, layered earth model has been developed for the simultaneous determination of near-source (in situ) velocity and relative locations of earthquakes. The method is particularly applicable when analyzing data from arrays in which most of the recording stations...
Comparison of aquifer characteristics derived from local and regional aquifer tests
R.B. Randolph, R.E. Krause, M.L. Maslia
1985, Groundwater (23) 309-316
A comparison of the aquifer parameter values obtained through the analysis of a local and a regional aquifer test involving the same area in southeast Georgia is made in order to evaluate the validity of extrapolating local aquifer-test results for use in large-scale flow simulations. Time-drawdown and time-recovery data were...
Diving depths of four alcids
John F. Piatt, David N. Nettleship
1985, The Auk (102) 293-297
Incidental catches of 12,243 Common Murres (Uria aalge), 875 Atlantic Puffins (Fratercula arctica), 36 Black Guillemots (Cepphus grylle), and 9 Razorbills (Alca torda) were recorded off Newfoundland during the summers of 1980-1982 (26,445 net-days of fishing effort). Most catch occurred in stationary gill nets set on the sea floor at...
Effects of the 1983 Coalinga, California, earthquake on creep along the San Andreas fault
Gerald M. Mavko, Sandra Schulz, Beth D. Brown
1985, Bulletin of the Seismological Society of America (75) 475-489
The M//L approximately equals 6. 5 earthquake that occurred near Coalinga, California, on May 2, 1983 induced changes in near-surface fault slip along the San Andreas fault. Coseismic steps were observed by creepmeters along a 200-km section of the San Andreas. some of the larger aftershocks induced additional steps, both...
SIMULATING FLOW IN THE TIDAL POTOMAC RIVER.
Raymond W. Schaffranek
1985, Conference Paper
A one-dimensional unsteady flow model has been applied to the tidal Potomac River, including its major tributaries and marginal embayments, between Washington, D. C. and Indian Head, Md. The computer model has been calibrated to simulate the combined effects of tide, freshwater inflows, and wind conditions governing flow in the...
Identification and tabulation of geological contacts in the Edwards aquifer, San Antonio area, Texas
T. A. Small
1985, Texas Department of Water Resources Report LP-199
No abstract available....
Lake trout reproductive behavior: influence of chemosensory cues from young-of-the-year by-products
Neal R. Foster
1985, Transactions of the American Fisheries Society (114) 794-803
Chemosensory cues, particularly those emanating from substrate areas occupied by previously hatched young, may play an important role in the reproductive behavior of lake trout Salvelinus namaycush. Support for this hypothesis was obtained in laboratory experiments. Adults were placed in a large circular pool with four experimental reefs. Egg membranes...
Organophosphorus insecticide induced decrease in plasma luteinizing hormone concentration in white-footed mice
Barnett A. Rattner, S.D. Michael
1985, Toxicology Letters (24) 65-69
Oral intubation of 50 and 100 mg/kg acephate inhibited brain acetylcholinesterase (AChE) activity by 45% and 56%, and reduced basal luteinizing hormone (LH) concentration by 29% and 25% after 4 h in white-footed mice (Peromyscus leucopus noveboracensis). Dietary exposure to 25, 100, and 400 ppm acephate for...
Investigation of selected streamflow characteristics of the Alabama River upstream from Selma, Alabama
G. H. Nelson Jr., C. O. Ming, W. L. Psinakis
1985, Water-Resources Investigations Report 85-4055
Available data for floods in the vicinity of Montgomery since the late 1800 's indicate that the flood of 1886 is the highest since settlement of the area in 1814. Profiles for floods in 1948, 1961, 1976, and 1979 were defined using floodmarks and recorded peak stages at gaging stations...
FHS Committee Reports: Finance Committee
D. Anderson
1985, Fish Health Newsletter (13)
Pup production, abundance, and breeding distribution of northern elephant seals, Winter 1981
James L. Bodkin, Ronald J. Jameson, Glenn R. VanBlaricom
1985, California Fish and Game (71) 53-59
No abstract available....
Feeding habits of larval and fingerling striped bass and zooplankton dynamics in fertilized rearing ponds
J. G. Geiger, K. Fitzmayer, C. J. Turner, W. C. Nichols
1985, Progressive Fish-Culturist (47) 213-223
Fertilization of freshwater striped bass rearing ponds with cottonseed meal or chicken manure and chicken litter in combination with liquid inorganic fertilizers and zooplankton inoculation were evaluated in 10 0.04‐ha (0.10 acre) ponds over a 4‐week period. Chlorophyll α levels and pH were significantly higher, and alkalinity and Secchi disk...
Effects of cumulative loading level, as fish weight per unit flow, on water quality and growth of lake trout
J. W. Meade, J.S. Ramsey, J.C. Williams
1985, Journal of the World Mariculture Society (16) 40-51
Lake trout, Salvelinus namaycush, were cultured in a series of five rearing units (in triplicate). The fish removed available oxygen in each unit, from about 10.5 to 7.0 mg/L. Oxygen was replaced, through aeration, between rearing units. Effects of cumulative loading, as fish weight/flow rate, are described in terms of water...
Heteropolaria colisarum Foissner and Schubert, 1977 (Protozoa: Epistylididae) or North American freshwater fishes
W. Foissner, G. L. Hoffman, A.J. Mitchell
1985, Journal of Fish Diseases (8) 145-160
The peritrichous ciliate ‘Epistylis sp.’ involved in the‘red-sore’ disease of various North American freshwater fishes is identified as Heteropolaria colisarum Foissner & Schubert, 1977. Its morphology is redescribed from observations of living and silver-stained organisms and biometrically analysed individuals. Extended zooids can be easily identified by their highly characteristic...
Survey of striped bass hatchery management in the southeastern United States
J. G. Geiger, N. C. Parker
1985, Progressive Fish-Culturist (47) 1-13
No abstract available....
Registration of Romet (Ro5-0037), a 15-year effort
G. L. Bullock, R. L. Herman, F. P. Meyer
1985, Fish Health Newsletter (13) 1
