Variation of iridium in a differentiated tholeiitic dolerite
L. P. Greenland
1971, Geochimica et Cosmochimica Acta (35) 319-322
Iridium has been determined in a drill core from the Great Lake (Tasmania) dolerite sheet. Iridium decreases systematically from the mafic dolerites (0.25 ppb) to the granophyres (0.006 ppb). The trend with differentiation closely parallels that of chromium....
Isotopic composition of strontium in three basalt-andesite centers along the Lesser Antilles arc
C. E. Hedge, J.F. Lewis
1971, Contributions to Mineralogy and Petrology (32) 39-47
Si87/Sr86 ratios have been determined for lavas and py lastic rocks from three basalt-andesite centers along the Lesser Antilles arc—Mt. Misery on the island of St. Kitts, Soufriere on the island of St. Vincent, and Carriacou, an island of The Grenadines. The average Si87/Sr86 content of these rocks...
Scanning electron microscopy of clays and clay minerals
B.F. Bohor, R.E. Hughes
1971, Clays and Clay Minerals (19) 49-54
The scanning electron microscope (SEM) proves to be ideally suited for studying the configuration, texture, and fabric of clay samples. Growth mechanics of crystalline units—interpenetration and interlocking of crystallites, crystal habits, twinning, helical growth, and topotaxis—also are uniquely revealed by the SEM.Authigenic kaolins make up the bulk of the examples...
Population biology of lake trout (Salvelinus namaycush) of Lake Superior before 1950
Gary T. Sakagawa, Richard L. Pycha
1971, Journal of the Fisheries Research Board of Canada (28) 65-71
Scale samples collected in 1948 were used to estimate the instantaneous total mortality rate (0.70) and growth for lake trout (Salvelinus namaycush) in Lake Superior before the population had been significantly reduced by the sea lamprey (Petromyzon marinus). Indirect evidence indicates that the instantaneous natural mortality rate was probably 0.10–0.25....
Earthquakes: May-June 1971
Carl A. Posey, editor(s)
1971, Earthquake Information Bulletin (USGS) (3) 26-27
No abstract available....
The earth's core: Speculations on its chemical equilibrium with the mantle
R. Brett
1971, Geochimica et Cosmochimica Acta (35) 203-221
A review of the literature indicates that a reasonable estimate of the composition of the earth's core is iron with Ni0–5, Si10–25 (wt.%). Thermodynamic calculations and comparison of chondritic with terrestrial abundances indicate that 1 wt.% each of Mn, P, and Cr might also be present. A core of this composition...
Comparison of Sr87 Sr86 for sea-water strontium and the Eimer and Amend SrCO3
R.A. Hildreth, W.T. Henderson
1971, Geochimica et Cosmochimica Acta (35) 235-238
A series of analyses were undertaken to determine a precise difference between sea-water strontium and the Eimer and Amend SrCO3 standard. A mean difference between the sea-water composite and the Eimer and Amend SrCO3 of 0.00107 ± 0.000042 was obtained....
Tertiary climatic fluctuations and methods of analysis of tertiary floras
J. A. Wolfe
1971, Palaeogeography, Palaeoclimatology, Palaeoecology (9) 27-57
On theoretical grounds, an analysis of the physiognomy of a Tertiary leaf assemblage is more direct and reliable than a circuitous floristic analysis in assigning thermal regimes to fossil assemblages. Using primarily foliar physiognomy and secondarily floristic composition, it can be shown that: (1) some middle latitude Tertiary assemblages probably...
Lake-level fluctuations in the Kenai-Soldotna area, Alaska, 1967-71
G. S. Anderson, S. H. Jones
1971, Open-File Report 71-7
No abstract available....
Floods of Utah, magnitude and frequency characteristics through 1969
Elmer Butler
1971, Report
No abstract available....
Water in the economy of the Jackson Purchase region of Kentucky
Robert W. Davis, T. William Lambert, Arnold J. Hansen Jr.
1971, Kentucky Geological Survey Special Publication 20-10
No abstract available....
Selenography and selenodesy with Apollo whole-disk lunar photographs I. Selenography
D.W.G. Arthur
1971, Icarus (14) 388-418
The Apollo whole-disk lunar photographs, with spacecraft lunar nadirs about 70° from the center of mean face, have considerable selenodetic potential provided that the requirements of resolution and precision can be met. Uncertainties in the internal camera geometry degrade the precision and make...
Urine of the northern fur seal (Callorhinus ursinus): analyses of 11 pelagic samples
M.C. Keyes, E.J. Barron, A. J. Ross
1971, Journal of the American Veterinary Medical Association (159) 567-570
No abstract available ...
Yields and specific capacities of bedrock wells in Kentucky
D. V. Whitesides
1971, Kentucky Geological Survey Information Circular 21
No abstract available....
Geology of the Coamo area, Puerto Rico, and its relation to the volcanic arc-trench association
Lynn Glover
1971, Professional Paper 636
No abstract available....
Some blood chemistry values for the juvenile coho salmon (Oncorhynchus kisutch)
Gary Wedemeyer, K. Chatterton
1971, Journal of the Fisheries Research Board of Canada 606-608
Overlapping Gaussian distribution curves were resolved into normal ranges for 1800 clinical test values obtained from caudal arterial blood or plasma of more than 1000 juvenile coho salmon (Oncorhynchus kisutch) held under defined conditions of diet and temperature. Estimated normal blood chemistry ranges were bicarbonate, 9.5–12.6 mEq/liter; blood urea nitrogen (BUN),...
Public and industrial water supplies of Kentucky, 1968-69
Donald S. Mull, Robert Vittum Cushman, T. William Lambert
1971, Kentucky Geological Survey Information Circular 20
No abstract available....
Water resources data for Idaho, water year 1970; Part 1, Surface water records
U.S. Geological Survey
1971, Water Data Report ID-70-1
Surface-water records for the 1970 water year for gaging stations, partial-record stations, and miscellaneous sites within the State of Idaho are given in this report and their locations shown in figures 2 and 3. Records for a few selected gaging stations in bordering States also are included. The records were...
Water resources data for Louisiana, water year 1970
Water Resources Division, U.S. Geological Survey
1971, Water Data Report LA-70-1
Water-resources data for the 1970 water year for Louisiana, including records of streamflow or reservoir storage at gaging stations, partial-record stations, and miscellaneous sites, and records of water quality data on the chemical and physical characteristics of surface water are given in this report. Records for a few pertinent gaging...
Water resources data for Idaho, water year 1970: Part 2. Water quality records
1971, Water Data Report ID-70-2
No abstract available....
Sea-floor spreading at the junction between Gorda Rise and Mendocino Ridge
George W. Moore
1970, Bulletin of the Geological Society of America (81) 2817-2823
A Quaternary deformation pattern revealed by new sub-bottom acoustic profiles supplements previous knowledge derived chiefly from magnetic and seismic evidence on the contemporary tectonics off northern California. An inferred age for the sedimentary cover along the axis of the southern part of Gorda Rise suggests...
Lower Devonian graptolites from southeastern Alaska
Michael Churkin Jr., Herman Jaeger, G. Donald Eberlein
1970, Lethaia (3) 183-202
The youngest zones of Monograptus occur in Devonian black shale and slate along the western shore of Prince of Wales Island and on Noyes Island, southeastern Alaska. The following five species of Monograptus, in close association with vascular plants and marine shelly faunas, indicate a Praguian, (Siegenian to Early...
Water resources data Maryland and Delaware, water year 1968, Part 2. Water quality records
U.S. Geological Survey
1970, Water Data Report MD-DE-68-2
No abstract available....
Water resources data Maryland and Delaware, water year 1970, Part 1. Surface water records
U.S. Geological Survey
1970, Water Data Report MD-DE-70-1
No abstract available....
Water resources data Maryland and Delaware, water year 1968, Part 1. Surface water records
U.S. Geological Survey
1970, Water Data Report MD-DE-68-1
No abstract available....
