Preliminary results, Central Gneiss Complex of the Coast Range batholith, southeastern Alaska: the roots of a high-K, calc-alkaline arc?
F. Barker, Joseph G. Arth
1984, Physics of the Earth and Planetary Interiors (35) 191-198
The Central Gneiss Complex (CGC) of the Coast Range batholith is the oldest unit of the batholith east of Ketchikan, Alaska, being dated by the zircon UPb method (by T.W. Stern) at 128-140 Ma. Heterogeneous, layered, commonly migmatitic, orthogneiss of hornblende-biotite quartz diorite, tonalite, quartz monzodiorite and granodiorite compositions (IUGS...
FEDERAL MINERAL LAND INFORMATION SYSTEM.
Richard L. Kleckner
1984, Conference Paper, Technical Papers of the American Congress of Surveying and Mapping
The ability of geographic information systems to combine point, line, and areal data has been widely documented, although the establishment of a particular data base presents its own unique problems. The U. S. Geological Survey is developing a geographic information system consisting of information on Federal surface ownership, Federal subsurface...
REMOTE-SENSING MINERAL DISCOVERIES IN THE MOJAVE DESERT OF CALIFORNIA.
Gary L. Raines, Donald B. Hoover, William E. Collins
1984, Conference Paper
As a result of remote sensing studies in the Mojave Desert of California three previously unknown stockwork molybdenum systems have been discovered. It is not known if economic deposits of molybdenum and associated minerals occur in these areas; there is, however, sufficient data to judge that these areas are worthy...
RAINFALL-RUNOFF MECHANICS FOR DEVELOPED URBAN BASINS, SOUTH FLORIDA.
Robert A. Miller
1984, Conference Paper, University of Kentucky, Office of Engineering Services, (Bulletin) UKY BU
Rainfall-runoff data, collected by the US Geological Survey as part of an urban hydrology study in south Florida, were analyzed to find relations between depths of rainfall and basin runoff. Data were collected for about 300 runoff events on four different urban land-use basins - commercial, highway, single-family residential, and...
Elk and deer diets in old-growth forests in western Washington
David M. Leslie Jr., Edward E. Starkey, Martin Vavra
1984, Journal of Wildlife Management (48) 762-775
Dietary quality and overlap of sympatric Roosevelt elk (Cervus elaphus roosevelti) and Columbian black-tailed deer (Odocoileus hemionus columbianus) were investigated in old-growth forests of the Hoh Valley, Olympic National Park, Washington. Diets of both cervids were comprised mainly of common old-growth flora, particularly in winter. High dietary overlap suggested competitive...
Evolution of the yardangs at Rogers Lake, California
A. W. Ward, R. Greeley
1984, Geological Society of America Bulletin (95) 829-837
Yardangs are streamlined, wind-eroded hills common to most deserts. Yardangs at Rogers Lake, Mojave Desert, California, have streamlined forms characteristic of objects eroded by moving fluids, a teardrop shape that approaches an ideal 1:4 width-to-length ratio. In wind-tunnel simulations, miniature forms of various...
Carbon and its isotopes in mid-oceanic basaltic glasses
D.J. Des Marais, J.G. Moore
1984, Earth and Planetary Science Letters (69) 43-57
Three carbon components are evident in eleven analyzed mid-oceanic basalts: carbon on sample surfaces (resembling adsorbed gases, organic matter, or other non-magmatic carbon species acquired by the glasses subsequent to their eruption), mantle carbon dioxide in vesicles, and mantle carbon dissolved...
Analysis of trace metals in water by inductively coupled plasma emission spectrometry using sodium dibenzyldithiocarbamate for preconcentration
C. L. Smith, Jerry M. Motooka, W. R. Willson
1984, Analytical Letters (17) 1715-1730
Since concentrations of trace elements in most natural waters seldom exceed the μg/L level, analysis of trace elements in natural waters by inductively coupled plasma emission spectrometry (ICP) requires a preconcentration procedure. The elements Ag, Bi, Cd, Co, Cu, Fe, Mo, Ni, Pb, Sn, V, W, and Zn were separated...
Paleogeographic controls of coal accumulation, Cretaceous Blackhawk Formation and Star Point Sandstone, Wasatch Plateau, Utah
R. M. Flores, L. F. Blanchard, J. D. Sanchez, W.E. Marley, W.J. Muldoon
1984, Geological Society of America Bulletin (95) 540-550
Analysis of sequences, associations, and relationships of facies in the Upper Cretaceous Blackhawk Formation and Star Point Sandstone in the Wasatch Plateau, Utah, leads to inferences regarding the paleogeographic controls affecting the accumulation of coals in delta–barrier-island complexes. Progradation, lateral shifting, and abandonment...
U. S. GEOLOGICAL SURVEY MARINE-MINERALS RESEARCH.
Offield
1984, Conference Paper, Oceans Conference Record (IEEE)
Summary form only given. The US Exclusive Economic Zone is an area approximately one and two-thirds the size of the land area of the United States. In this frontier area, US Geological Survey (USGS) research in marine minerals is aimed at three objectives: (1) defining geologic settings of potential mineral...
Geology of the Devonian black shales of the Appalachian Basin
John B. Roen
1984, Organic Geochemistry (5) 241-254
Black shales of Devonian age in the Appalachian Basin are a unique rock sequence. The high content of organic matter, which imparts the characteristic lithology, has for years attracted considerable interest in the shales as a possible source of energy. The recent energy shortage prompted the U.S. Department of Energy...
POTENTIAL FOR NITROSAMINE FORMATION RESULTING FROM THE USE OF RHODAMINE WT FOR TIME-OF-TRAVEL STUDIES: A COMBINED LABORATORY AND FIELD INVESTIGATION.
Sharon M. Johnson, Thomas R. Steinheimer
1984, Conference Paper, National Meeting - American Chemical Society, Division of Environmental Chemistry
Rhodamine WT is used by surface water hydrologists for time of travel and dispersion studies in which flow characteristics of surface streams are determined. Surface water contamination by nitrosamines formed from Rhodamine WT and nitrite ion has been studied. A method for residue analysis of N-nitrosodiethylamine (NDEA) has been developed...
Lu-Hf and Sm-Nd evolution in lunar mare basalts
D.M. Unruh, P. Stille, P. J. Patchett, M. Tatsumoto
1984, Journal of Geophysical Research Solid Earth (89) B459-B477
Lu-Hf and Sm-Nd data for mare basalts combined with Rb-Sr and total REE data taken from the literature suggest that the mare basalts were derived by small (≤10%) degrees of partial melting of cumulate sources, but that the magma ocean from which these sources formed was light REE and Hf-enriched....
Molybdenum and copper levels in white-tailed deer near uranium mines in Texas
Kirk A. King, John LeLeux, Bernard M. Mulhern
1984, Journal of Wildlife Management (48) 267-270
No abstract available. ...
Speculations on the petroleum geology of the accretionary body: an example from the central Aleutians
J. McCarthy, A.J. Stevenson, D.W. Scholl, T.L. Vallier
1984, Marine and Petroleum Geology (1) 151-167
In the 300 km wide Adak-Amlia sector of the central Aleutian Trench ??? 36 000 km3 of offscraped trench fill makes up the wedge-shaped mass of the Aleutian accretionary body. Within this wedge, seismic reflection profiles reveal an abundance of potential hydrocarbon-trapping structures. These structures include antiforms, thrust and normal...
Periodic jökulhlaups from Pleistocene glacial Lake Missoula-New evidence from varved sediment in northern Idaho and Washington
Richard B. Waitt
1984, Quaternary Research (22) 46-58
Newly examined exposures in northern Idaho and Washington show that catastrophic floods from glacial Lake Missoula during late Wisconsin time were repeated, brief jökulhlaups separated by decades of quiet glaciolacustrine and subaerial conditions. Glacial Priest Lake, dammed in the Priest River valley by a tongue of the Purcell trench lobe...
Ferromanganese nodules from MANOP Sites H, S, and R-Control of mineralogical and chemical composition by multiple accretionary processes
J. Dymond, M. Lyle, B. Finney, D.Z. Piper, K. Murphy, R. Conard, N. Pisias
1984, Geochimica et Cosmochimica Acta (48) 931-949
The chemical composition of ferromanganese nodules from the three nodule-bearing MANOP sites in the Pacific can be accounted for in a qualitative way by variable contributions of distinct accretionary processes. These accretionary modes are:1.(1) hydrogenous, i.e., direct precipitation or accumulation of colloidal metal oxides in seawater,2.(2)...
Thermal modeling of Halley's comet
P.R. Weissman, H. H. Kieffer
1984, Advances in Space Research (4) 221-224
The comet thermal model of Weissman and Kieffer is used to calculate gas production rates and other parameters for the 1986 perihelion passage of Halley's Comet. Gas production estimates are very close to revised pre-perihelion estimates by Newburn based on 1910 observations of Halley; the increase in observed gas production...
Reproduction and survival of the desert tortoise (Scaptochelys agassizii) in Ivanpah Valley, California
F.B. Turner, P.A. Medica, C.L. Lyons
1984, Copeia (1984) 811-820
No abstract available....
Illinois basin coal fly ashes. 1. Chemical characterization and solubility
William R. Roy, R. A. Griffin, D. R. Dickerson, R.M. Schuller, S.M.C. Martin
1984, Environmental Science & Technology (18) 734-739
No abstract available....
Creep behavior of submarine sediments
Armand J. Silva, J.S. Booth
1984, Geo-Marine Letters (4) 215-219
A series of experiments on drained creep of marine sediment indicates that strength degradation results from the creep process, which implies an associated reduction in slope stability. Furthermore, the highest creep potential of a sediment may be at its preconsolidation stress. Results from the experiments on samples from Georges Bank...
A simple model of a phreatic surface through an earth dam
T. V. Hromadka II
1984, Advances in Water Resources (7) 141-143
A simple numerical model for estimating a phreatic surface in an earthen dam is presented. The numerical approach is based upon the Complex Variable Boundary Element Method (CVBEM). By expanding the CVBEM approximation geometric functions into a first order Taylor series, the unknown phreatic surface location geometrics can be approximated...
Modeling behavior of prescribed fires in Yosemite National Park
J. W. van Wagtendonk, S.J. Botti
1984, Journal of Forestry (82) 479-484
The National Fire Danger Rating System and the Fire Behavior Prediction System were tested on prescribed fires burning underneath canopies in six fuel types in Yosemite National Park, California. The mean error for rate of spread was +0.03 foot per minute for the NFDRS and -0.15 foot for the...
Seed predation due to the yucca moth symbiosis
Jon E. Keeley, Sterling C. Keeley, C. C. Swift, J. Lee
1984, American Midland Naturalist (112) 187-191
All species of Yucca (Agavaceae) require the pollinator services of a species of moth in the genus Tegeticula (Lepidoptera: Incurvariidae). These moths oviposit in the ovary of the plants and the larvae are entirely dependent upon Yucca seeds for food. The extent and distribution of larval seed predation was examined...
SHUTTLE IMAGING RADAR PROVIDES FRAMEWORK FOR SUBSURFACE GEOLOGIC EXPLORATION IN EGYPT AND SUDAN.
Carol S. Breed, John F. McCauley, Gerald G. Schaber
1984, Conference Paper
Shuttle Imaging Radar provides a pictorial framework to guide exploration for mineral resources (potential placers), groundwater sources, and prehistoric archaeological sites in the Western Desert of Egypt and Sudan. Documented penetration by the SIR-A signal of dry surficial sediment to depths of a meter or more revealed bedrock geologic features...
