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Page 5474, results 136826 - 136850

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Tour guide: John Wesley Powell Federal Building
Water Resources Division, U.S. Geological Survey
1974, Report
Data from 5,594 samples collected from 1931 through 2006 were used to describe naturally occurring fluoride concentrations in freshwater aquifers in Louisiana. Statistical analyses were used to summarize fluoride concentrations in the aquifers....
New activities at the U.S. Geological Survey
Vincent E. McKelvey
1974, Report
As the Nation's principal source of information about the configuration of the land surface, the composition and structure of the rocks at and beneath the surface, the distribution and character of its energy, mineral, and water resources, and the nature of natural geologic processes, the U. S. Geological Survey focuses...
Studying the Earth from space
Water Resources Division, U.S. Geological Survey
1974, Report
Pictures of the Earth's surface obtained from satellites are providing scientists with new tools to investigate tne Earth and its environment. A growing population and an everexpanding technology place demands on our natural resources. However, man can no longer treat his resources strictly according to immediate economic dictates; a balance...
Shore zone land use and land cover: Central Atlantic Regional Ecological Test Site
R. Dolan, B.P. Hayden, C.L. Vincent
1974, Natural Resources Report 8
Anderson's 1972 United States Geological Survey classification in modified form was applied to the barrier-island coastline within the CARETS region. High-altitude, color-infrared photography of December, 1972, and January, 1973, served as the primary data base in this study. The CARETS shore zone studied was divided into six distinct geographical regions;...
Water resources data for New Mexico, water year 1973; Part 1. Surface water records
Water Resources Division, U.S. Geological Survey
1974, Water Data Report NM-73-1
Surface-water records for the 1973 calendar year for New Mexico, including records of streamflow or reservoir storage at gaging stations, partial-record stations, and miscellaneous sites, are given in this report and their locations shown in figures 1, 2. Records for a 'few pertinent gaging stations in bordering States also are...
Abstracting and indexing guide
U.S. Department of the Interior, Office of Water Resources Research
1974, Monograph 501
These instructions have been prepared for those who abstract and index scientific and technical documents for the Water Resources Scientific Information Center (WRSIC). With the recent publication growth in all fields, information centers have undertaken the task of keeping the various scientific communities aware of current and past developments. An...
Obsidian hydration profile measurements using a nuclear reaction technique
R.R. Lee, D.A. Leich, T.A. Tombrello, J.E. Ericson, I. Friedman
1974, Nature (250) 44-47
AMBIENT water diffuses into the exposed surfaces of obsidian, forming a hydration layer which increases in thickness with time to a maximum depth of 20–40 µm (ref. 1), this layer being the basic foundation of obsidian dating2,3....
Chemistry and mineralogy of garnet pyroxenites from Sabah, Malaysia
B. A. Morgan
1974, Contributions to Mineralogy and Petrology (48) 301-314
Garnet pyroxenites and corundum-garnet amphibolites from the Dent peninsula of eastern Sabah (North Borneo) occur as blocks in a slump breccia deposit of late Miocene age. The earliest formed minerals include pyrope-almandine garnet, tschermakitic augite, pargasite, and rutile. Cumulate textures are present in two of the...
Presentation and interpretation of chemical data for igneous rocks
T. L. Wright
1974, Contributions to Mineralogy and Petrology (48) 233-248
Arguments are made in favor of using variation diagrams to plot analyses of igneous rocks and their derivatives and modeling differentiation processes by least-squares mixing procedures. These methods permit study of magmatic differentiation and related processes in terms ofall of the chemical data available. Data are presented as they are reported...
A comparison of infrared, radar, and geologic mapping of lunar craters
T.W. Thompson, H. Masursky, R.W. Shorthill, G.L. Tyler, S.H. Zisk
1974, The Moon (10) 87-117
Between 1000 and 2000 infrared (eclipse) and radar anomalies have been mapped on the nearside hemisphere of the Moon. A study of 52 of these anomalies indicates that most are related to impact craters and that the nature of the infrared and radar responses is compatible...
3,800-Myr granitic gneiss in south-western Minnesota
S. S. Goldich, C. E. Hedge
1974, Nature (252) 467-468
WE have previously arrived at an age of 3,550 Myr for granitic1 gneiss in the vicinities of Morton and Montevideo in the Minnesota River valley, south-western Minnesota. We now report new Rb–Sr analyses (Table 1) and an age of 3,800 Myr for the fine grained foliated phase...
Ophiolites and oceanic crust
E.M. Moores, E.D. Jackson
1974, Nature (250) 136-139
OPHIOLITES consist of a pseudostratiform sequence, of harzburgite, tectonite, ultramafic and mafic cumulates sometimes including gabbro and quartz diorite (plagiogranite) intrusions, dolerite dyke swarms, pillow lava 1, and deep-sea sediments2-4. This assemblage occurs in all Phanerozoic mountain systems and is interpreted as fossil oceanic crust and uppermost mantle5-10. Outstanding problems...
Measurement in a marine environment using low cost sensors of temperature and dissolved oxygen
F.A. Godshall, R. L. Cory, D.E. Phinney
1974, Chesapeake Science (15) 178-181
Continuous records of physical parameters of the marine environment are difficult as well as expensive to obtain. This paper describes preliminary results of an investigative program with the purpose of developing low cost time integrating measurement and averaging devices for water temperature and dissolved oxygen.Measurements were made in an estuarine...
The status of the light-footed clapper rail
S.R. Wilbur
1974, American Birds (28) 868-870
Only 12 California marsh areas are presently believed to be inhabited by the Light-footed Clapper Rail, and eight of these appear to support only 5-15 birds apiece. Tentative estimates for the other four are: Anaheim Bay 200, Upper Newport 30-35, Los Penasquitos 30, and Tijuana Estuary 150. These...