Relationship of grade, tonnage, and basement lithology in volcanic-hosted epithermal precious-and base-metal quartz-adularia-type districts
D.L. Mosier, Donald A. Singer, T. Sato, N.J. Page
1986, Mining Geology (36)
Examination of grades, tonnages, and basement rocks for 88 epithermal precious- and base-metal quartz-adularia-type districts in North, Central, and South America, and Japan reveals that the type of basement rock below the mineralized veins is useful for predicting grade and size of deposits. Epithermal districts overlying basement with salt and...
Minerals, lands, and geology for the common defence and general welfare, Volume 3, 1904-1939 : A history of geology in relation to the development of public-land, federal-science, and mapping policies and the development of mineral resources in the United States from the 25th to the 60th year of the U.S. Geological Survey
Mary C. Rabbitt
1986, Book
Mrs. Rabbitt's third volume covers the years 1904 to 1939, from the beginning of the conservation movement under Theodore Roosevelt to the beginning of World War II. From a national perspective, these were years of great development and change in the use of energy, trouble in the coal industry, and...
Seismic Computerized Alert Network
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 153-153
In 1985 the USGS devised a model for a Seismic Computerized Alert Network (SCAN) that would use continuous monitoring of seismic data from existing types of instruments to provide automatic, highly-reliable early warnings of earthquake shaking. In a large earthquake, substantial damaging ground motions may occur at great distances from...
Obstacles facing the venus radar mapper - The implications of gestalt formation in stereo-radargrammetry
R.L. Wildey
1986, Earth, Moon and Planets (35) 47-54
The question of adapting to radar images the existing hardware that form topographic maps through stereo-photogrammetric models, is examined in principle. Such hardware utilizes a human/ computer hybrid. Although the problem of brightness differentials between corresponding landmarks can be dealt with pseudo-photoclinometrically, the main problem is whether the perspective in...
Variability in base streamflow and water quality of streams and springs in Otter and Rosebud Creek basins, southeastern Montana
J. H. Lambing, R. F. Ferreira
1986, Water-Resources Investigations Report 85-4302
The results of three base-flow studies conducted on Otter and Rosebud Creeks during 1977, 1978, and 1983 are summarized and compared to assess the variability of base-flow magnitude and water quality during years of widely different precipitation. Chemical analyses for springs in these basins also are presented to provide and...
Solubility relations in the system potassium chloride-ferrous chloride-water between 25 and 75.degree.C at 1 atm
I.-M. Chou, L.D. Phan
1986, Journal of Chemical and Engineering Data (31) 154-156
Solubility relations in the ternary system KCl-FeCl2-H2O have been determined by means of the visual polythermal method at 1 atm from 18 to 75??C along 10 composition lines. Solubilities of sylvite were measured along five composition lines defined by mixing KCl with five aqueous FeCl2 solutions containing 10, 20, 30,...
Chemistry of illite/smectite and end-member illite
J. Srodon, D.J. Morgan, E.V. Eslinger, D. D. Eberl, M.R. Karlinger
1986, Clays and Clay Minerals (34) 368-378
Chemical data from three different series of diagenetic illite/smectites (I/S), analyzed statistically by two regresion techniques, indicate that the content of fixed-K per illite layer is not constant, but ranges from ∼0.55 per O10(OH)2 for illite layers in randomly interstratified I/S (R=0; > 50% smectite layers) to ∼1.0 per O10(OH)2 for illite...
Extractable cadmium, mercury, copper, lead, and zinc in the lower Columbia River estuary, Oregon and Washington
Gregory J. Fuhrer
1986, Water-Resources Investigations Report 86-4088
No abstract available....
Magnesioferrite from the Cretaceous-Tertiary boundary, Caravaca, Spain
B.F. Bohor, E.E. Foord, R. Ganapathy
1986, Earth and Planetary Science Letters (81) 57-66
Magnesioferrite grading toward magnetite has been identified as a very small but meaningful constituent of the basal iron-rich portion of the Cretaceous-Tertiary (K-T) boundary clay at the Barranco del Gredero section, Caravaca, Spain. This spinel-type phase and others of the spinel group, found in K-T boundary clays at many widely...
Louisiana hydrologic atlas map no. 2: Areal extent of freshwater in major aquifers of Louisiana
Charles W. Smoot
1986, Water-Resources Investigations Report 86-4150
The areal availability of freshwater (cl content < 250 mg/L) in 14 major aquifers in Louisiana was investigated. The depth of occurrence of fresh groundwater in Louisiana is variable. The aquifers were mapped to show their areal extent from the outcrop or subcrop to the downdip limit of freshwater. Water...
Use of spawner recruit relations to evaluate the effect of degraded environment and increased fishing on the abundance of fall run Chinook in several California streams
R.R. Reisenbichler
1986, Thesis
No abstract available ...
Description and generalized distribution of aquifer materials in the alluvial basins of Arizona and adjacent parts of California and New Mexico
Geoffrey W. Freethey
1986, Hydrologic Atlas 663
No abstract available....
Feeding ecology of sandhill cranes during spring migration in Nebraska
K. J. Reinecke, Gary L. Krapu
1986, Journal of Wildlife Management (50) 71-79
We studied the food habits of midcontinent sandhill cranes (Grus canadensis) during spring 1978 and 1979 at their primary staging area along the Platte River and compared population food and foraging habitat requirements with availability. Crane diets varied among the 3 principal foraging habitats, but not between sexes, ages, or...
Winter ecology of bald eagles in southcentral Nebraska
G.R. Lingle, Gary L. Krapu
1986, Prairie Naturalist (18) 65-78
Approximately 200 bald eagles wintered along a 370-km section of the Platte and North Platte rivers in Nebraska during the winters of 1978-79 and 1979-80. A preponderance of the wintering eagles were adults, with the adult:subadult ratio highest during the harsh winter of 1978-79. Nocturnal roosts were located primarily in...
Molt chronology of northern pintails in California
Michael R. Miller
1986, Journal of Wildlife Management (50) 57-64
Intensity and chronology of molt in 10 feather groups (head, neck, breast, belly, back, rump, side, scapular, tertial, and tail) were measured using percentages of developing feathers (pinfeathers) converted to molt scores (0-100) in samples plucked monthly from northern pintails (Anas acuta) collected by shooting from August through March 1980-82...
Upper Pleistocene and Holocene lakes in the An Nafud, Saudi Arabia
E. Schulz, J.W. Whitney
1986, Hydrobiologia (143) 175-190
Two major lake periods were discovered in the sand sea of An Nafud and the surrounding areas. In Upper Pleistocene large lakes occurred around the dune area and in the interior of the sand sea. Their deposits were formed between 34 000 and 24 000 BP. The lakes were not...
A professional umbrella for the 80s: Report of the 1983-84 Professionalism Committee
C.F. Cole, C. Griswold, V. Henderson, E. Hester, T. Modde, R.L. Noble, G. Pardue, N. C. Parker, D.C. Peterson, W.F. Royce
1986, Fisheries (11) 22-28
No abstract available....
NEW STUDIES OF URBAN FLOOD FREQUENCY IN THE SOUTHEASTERN UNITED STATES.
Vernon B. Sauer
1986, Transportation Research Record 10-15
Five reports dealing with flood magnitude and frequency in urban areas in the southeastern United States have been published during the past 2 years by the U. S. Geological Survey (USGS). These reports are based on data collected in Tampa and Tallahassee, Florida; Atlanta, Georgia; and several cities in Alabama...
Mineralogy and paragenesis of 'pocket' clays and associated minerals in complex granitic pegmatites, San Diego County, California.
E.E. Foord, H.C. Starkey, J.E. Taggert Jr.
1986, American Mineralogist (71) 428-439
The sources of the elements incorporated into pocket-filling clays and pseudomorphous minerals, the conditions of formation, and the paragenesis of these minerals are discussed.-J.A.Z....
You asked for it! Present status of fish farmers in Arkansas
C. Collins
1986, Aquaculture Magazine (12) 50-52
You asked for it! Some basic requirements needed to culture channel catfish in ponds
C. Collins
1986, Aquaculture Magazine (11) 52-53
Effects of rearing density on growth and survival of lake trout
R. W. Soderberg, W. F. Krise
1986, Progressive Fish-Culturist (48) 30-32
Lake trout (Salvelinus namaycush) were reared at density indices (allowable density in pounds/cubic foot divided by fish length in inches) of 0.25, 0.50, 1.0, and 2.0 in cages suspended in circular tanks. Water flow rates were such that dissolved oxygen remained above 8 ppm within all the cages. Thus treatment...
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...
Low-frequency radiation from point sources in a fluid-filled borehole
Myung W. Lee
1986, Geophysics (51) 1801-1807
Far-field displacement fields have been derived for an impulsive point force acting on a fluid-filled borehole wall under the assumption that the borehole diameter is small compared to the wavelength involved. The displacements due to an arbitrary source can be computed easily by combining the solutions for the impulsive sources.In...
Fluid inclusion from drill hole DW-5, Hohi geothermal area, Japan: Evidence of boiling and procedure for estimating CO2 content
M. Sasada, E. Roedder, H. E. Belkin
1986, Journal of Volcanology and Geothermal Research (30) 231-251
Fluid inclusion studies have been used to derive a model for fluid evolution in the Hohi geothermal area, Japan. Six types of fluid inclusions are found in quartz obtained from the drill core of DW-5 hole. They are: (I) primary liquid-rich with evidence of boiling; (II) primary liquid-rich without evidence...
