The role of erosion by fish in shaping topography around Hudson submarine canyon.
D.C. Twichell, Craig B. Grimes, R. S. Jones, K.W. Able
1985, Journal of Sedimentary Petrology (55) 712-719
An 800-km 2 area of rough topography around the head of Hudson Canyon off the eastern United States is attributed to erosion by tilefish ( Lopholatilus chamaeleonticeps ) and associated species of crustaceans. The rough topography has a relief of 1-10 m, occurs in water depths of 120-500 m, and has been...
Degassing-induced crystallization of basaltic magma and effects on lava rheology
P. W. Lipman, N.G. Banks, J.M. Rhodes
1985, Nature (317) 604-607
During the north-east rift eruption of Mauna Loa volcano, Hawaii, on 25 March-14 April 1984 (Fig. 1), microphenocryst contents of erupted lava increased from 0.5 to 30% without concurrent change in either bulk magma composition or eruption temperature (1,140 ?? 3 ??C). The crystallization of the microphenocrysts is interpreted here...
Determination of total sulfur in lichens and plants by combustion-infrared analysis
L. L. Jackson, E.E. Engleman, J. L. Peard
1985, Environmental Science & Technology (19) 437-441
No abstract available....
Processes on a glacier-dominated coast, Alaska
Bruce F. Molnia
1985, Zeitschrift fur Geomorphologie, Supplementband (57) 141-153
The 500 km long Gulf of Alaska coastline between Cape Suckling and Cape Spencer can be characterized by constant rapid change in an environment of glaciers, stormy climate, high relief, and extreme oceanographic parameters. During a more than 200-year history of observation, bays have completely filled with sediment, new bays...
Regional setting and new information on some critical geologic features of the West Shasta district, California
J. P. Albers, J.H.C. Bain
1985, Economic Geology (80) 2072-2091
The West Shasta massive sulfide district is in the easternmost of a series of accreted island-arc and oceanic crust terranes that comprise the Klamath Mountains. A sequence of submarine volcanic rocks of predominantly Early Devonian age is the principal component of the island-arc terrane in which the sulfide deposits are...
Uranium mineralization in the Smith Lake district of the Grants uranium region, New Mexico.
N.S. Fishman, R. L. Reynolds, J. F. Robertson
1985, Economic Geology (80) 1348-1364
The Mariano Lake and Ruby 1 uranium orebodies, which together comprise much of the uranium ore in the Smith Lake district of the Grants uranium region, New Mexico, occur in sandstones in the lower part of the Brushy Basin Member of the Upper Jurassic Morrison Formation. The orebodies, which are...
The timing of ore formation in southeast Missouri: Rb-Sr glauconite dating at the Magmont mine, Viburnum trend
H. J. Stein, S.A. Kish
1985, Economic Geology (80) 739-753
Seven Bonneterre and Davis Formation glauconite samples from the Magmont mine area, Viburnum Trend, southeast Missouri, yield a 359 + or - 22-m.y. Rb-Sr isochron with an initial 87 Sr/ 86 Sr ratio of 0.7234 + or - 0.0273 (2 sigma). Gangue calcite from the ore zone has an 87 Sr/ 86 Sr ratio of approximately 0.7112. The...
Thorium, cerium, and monazite survey of the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
D. F. Siems, W. R. Griffitts, J. W. Whitlow, K.A. Duttweiler
1985, Open-File Report 84-843-P
No abstract available....
A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.
J.S. Booth, D.A. Sangrey, J.K. Fugate
1985, Journal of Sedimentary Petrology (55) 29-36
Design of the nomogram is based on effective stress and combines consolidation theory as applicable to depositional environments with the infinite-slope model of slope-stability analysis. The link between the two combined theories is a term representing the effective overburden stress, which may be...
SENSITIVITY OF STRUCTURAL RESPONSE TO GROUND MOTION SOURCE AND SITE PARAMETERS.
Erdal Safak
C.A. Brebbia, A.S. Cakmak, Abdel Ghaffar, editor(s)
1985, Conference Paper
Designing structures to withstand earthquakes requires an accurate estimation of the expected ground motion. While engineers use the peak ground acceleration (PGA) to model the strong ground motion, seismologists use physical characteristics of the source and the rupture mechanism, such as fault length, stress drop, shear wave velocity, seismic moment,...
Wildlife management plan for the Cottonwood Mountains, Death Valley National Monument
C. L. Douglas
1985, Technical Report CPSU/UNLV 006/35
No abstract available at this time...
Undersea topography and the comparative distributions of two pelagic cetaceans
Clifford A. Hui
1985, Fishery Bulletin (83) 472-475
No abstract available at this time...
Review of fish species introduced into the Great Lakes, 1819-1974
Lee Emery
1985, Technical Report 45
This review is based on an extensive literature search, combined with updated information obtained from biologists, and unpublished reports from private, state, and federal organizations throughout the Great Lakes basin. The chronological review lists 34 species of fishes in 13 families that were introduced into the basin from 1819 to...
Ecological effects of rubble-mound breakwater construction and channel dredging at West Harbor, Ohio (western Lake Erie)
Bruce A. Manny, Donald W. Schloesser, Charles L. Brown, John R. P. French III
1985, Technical Report EL-85-10
The investigation reported herein indicated that breakwater construction and associated channel dredging activities by the US Army Corps of Engineers in western Lake Erie at the entrance to West Harbor (Ohio) had no detectable adverse impacts on the distributions or abundances of macrozoobenthos and fishes. Rather, increases were noted in...
A summary of urban runoff studies in the Denver Metropolitan area, Colorado
S. R. Ellis, M. H. Mustard
1985, Water-Resources Investigations Report 84-4072
The Denver metropolitan area has been the subject of urban-runoff studies for several years. The first studies, started in about 1968, usually were concerned only with the quantity of urban runoff. In 1974, studies were begun that included both quantity and quality of urban runoff. In 1979, Denver was selected...
A GC-system for the analysis of residual geothermal gases
D.S. Sheppard, A.H. Truesdell
1985, Chromatographia (20) 681-682
The gases evolved from geothermal fields, after condensation of H2O, CO2, H2S and NH3 in caustic solution, contain He, H2, Ar, O2, N2, CH4 and higher hydrocarbons. The analysis for the major components in these residual gas mixtures can be achieved by use of two simple gas chromatographs in parallel,...
FLUORINE IN COLORADO OIL SHALE.
John R. Dyni
Gary James H., editor(s)
1985, Conference Paper, Oil Shale Symposium Proceedings
Oil shale from the lower part of the Eocene Green River Formation in the Piceance Creek Basin, Colorado, averages 0. 13 weight percent fluorine, which is about twice that found in common shales, but is the same as the average amount found in some oil shales from other parts of...
DISTRIBUTION OF TRACE ELEMENTS IN COAL MINERALS OF SELECTED EASTERN UNITED STATES COALS.
C.A. Palmer, M.-V. Wandless
1985, Conference Paper
The association of 34 elements with minerals found in coal was determined by a combination of analytical techniques on size and density fractions of low-temperature ash (LTA). Instrumental neutron activation analysis was used to determine the concentrations of the elements, and X-ray diffraction analysis, scanning electron microscopy, and scanning transmission...
The plumbotectonics of the West Shasta mining district, eastern Klamath Mountains, California
B. R. Doe, M.H. Delevaux, J. P. Albers
1985, Economic Geology (80) 2136-2148
The tectonic setting comprising the West Shasta mining district has often been compared with that of primitive island arcs. Concentrations of uranium, thorium, and lead and lead isotope compositions were determined for Devonian ores and rocks of the West Shasta district, eastern Klamath Mountains, California, to help evaluate the tectonic...
Correlation of the Rockland ash bed, a 400,000-year-old stratigraphic marker in northern California and western Nevada, and implications for middle Pleistocene paleogeography of central California
A.M. Sarna-Wojcicki, C.E. Meyer, H. R. Bowman, Hall N. Timothy, P.C. Russell, M.J. Woodward, J. L. Slate
1985, Quaternary Research (23) 236-257
Outcrops of an ash bed at several localities in northern California and western Nevada belong to a single air-fall ash layer, the informally named Rockland ash bed, dated at about 400,000 yr B.P. The informal Rockland pumice tuff breccia, a thick, coarse, compound tephra deposit southwest of Lassen Peak in...
Subdivision of thick sedimentary units into layers for simulation of groundwater flow
J. S. Weiss, A. K. Williamson
1985, Groundwater (23) 767-774
Subdividing thick sedimentary units into model layers based solely on stratigraphy can lead to serious violation of groundwater flow modeling restraints and produce erroneous results. Borehole geophysical data can be used to suggest relative permeabilities and delineate model layers that are more likely to have uniform hydraulic properties than layers...
WATER RESOURCES ACTIVITIES OF THE U. S. GEOLOGICAL SURVEY.
Dallas L. Peck
1985, Water Resources Bulletin (21) 901-907
The U. S. Geological Survey's (USGS) program of hydrologic data collection, investigations, and research provides information essential to water-resoures planning and management. The activities of the Water Resources Division (WRD) are in support of the Geological Survey's mission to provide geologic, topographic, and hydrologic information that contributes to the wise...
Abhurite, a new tin hydroxychloride mineral, and a comparative study with a synthetic basic tin chloride.
J.J. Matzko, H. T. Evans Jr., M.E. Mrose, P. Aruscavage
1985, Canadian Mineralogist (23) 233-240
Abhurite is a new mineral species found in blister-like protuberances on the surface of tin ingots submerged at a depth of 35 m in the Red Sea. It forms 1.5 mm diameter hexagonal plates bounded by the negative rhombohedron (0115); is colourless, transparent with opalescent lustre, white streak, hackly fracture,...
Three-dimensional trend mapping from wire-line logs
J.H. Doveton, Z. Ke-an
1985, Journal of the International Association for Mathematical Geology (17) 485
Mapping of lithofacies and porosities of stratigraphic units is complicated because these properties vary in three dimensions. The method of moments was proposed by Krumbein and Libby (1957) as a technique to aid in resolving this problem. Moments are easily computed from wireline logs and are simple statistics which summarize...
Federal coal resource occurrence and coal development potential maps of the Upper Nutria 7 1/2-minute quadrangle, McKinley County, New Mexico
Berge Exploration Inc.
1985, Open-File Report 80-41
No abstract available....
