Response of slimy sculpins to predation by juvenile lake trout in southern Lake Ontario
Randall W. Owens, Roger A. Bergstedt
1994, Transactions of the American Fisheries Society (123) 28-36
Abundance and biomass of slimy sculpin Cottus cognatus declined in Lake Ontario at depths most frequently occupied by juvenile lake trout Salvelinus namaycush (<70 m), but not at greater depths, during 1980–1987. The abundance of juvenile lake trout increased at depths less than 70 m between 1980 and 1987, and...
Geologic framework of the Aleutian arc, Alaska
Tracy L. Vallier, David W. Scholl, Michael A. Fisher, Terry R. Bruns, Frederic H. Wilson, Roland E. von Huene, Andrew J. Stevenson
1994, Book chapter, The geology of Alaska: Volume G-1 of Decade of North American Geology
The Aleutian arc is the arcuate arrangement of mountain ranges and flanking submerged margins that forms the northern rim of the Pacific Basin from the Kamchatka Peninsula (Russia) eastward more than 3,000 km to Cooke Inlet (Fig. 1). It consists of two very different segments that meet near Unimak Pass:...
Geomorphic change caused by outburst floods and debris flows at Mount Rainier, Washington, with emphasis on Tahoma Creek valley
J. S. Walder, C. L. Driedger
1994, Water-Resources Investigations Report 93-4093
Debris flows have caused rapid geomorphic change in several glacierized drainages on Mount Rainier, Washington. Nearly all of these flows began as glacial outburst floods, then transformed to debris flows by incorporating large masses of sediment in channel reaches where streams have incised proglacial sediments and stagnant glacier ice. This...
Freshwater bivalves
J.D. Williams, R.S. Butler
M. Deyrup, R. Franz, editor(s)
1994, Book chapter, Rare and Endangered Biota of Florida. Volume 4. Invertebrates.
Abstract not supplied at this time...
The status of sea ducks in the North Pacific Rim: Toward their conservation and management
R. Ian Goudie, Solange Brault, Bruce Conant, Alexander V. Kondratyev, Margaret R. Petersen, Kees Vermeer
Richard E. McCabe, Kelly G. Wadsworth, editor(s)
1994, Conference Paper, Transactions of the fifty-ninth North American wildlife and natural resources conference
Sea ducks (tribe Mergini after Johnsgard 1960) are the most northerly distributed ducks, and species diversity is greatest in the North Pacific. They exploit a diversity of inshore and offshore marine habitats during the non-breeding season, and their use of habitat during breeding varies from coastal through freshwater wetlands of...
Two major Cenozoic episodes of phosphogenesis recorded in equatorial Pacific seamount deposits
J.R. Hein, Yeh Hsueh-Wen, S.H. Gunn, W.V. Sliter, L.M. Benninger, Wang Chung-Ho
1993, Paleoceanography and Paleoclimatology (8) 293-311
Seamount phosphorites have been recognized since the 1950s, but this is the first study to provide an in depth exploration of the origin and history of these widespread deposits. Representative samples from equatorial Pacific Cretaceous seamounts were analyzed for chemical, mineralogical, and stable isotope compositions. The phosphorites occur in a...
Species richness and relative abundance of breeding birds in forests of the Mississippi Alluvial Valley
C.O. Nelms, D.J. Twedt
Winston Paul Smith, editor(s)
1993, Book chapter, Fourth meeting of the Southeast Management Working Group Partners in Flight
In 1992, the Vicksburg Field Research Station of the National Wetlands Research Center initiated research on the ecology of migratory birds within forests of the Mississippi Alluvial Valley (MAV). The MAV was historically a nearly contiguous bottomland hardwood forest, however, only remnants remain. These remnants are fragmented and often influenced...
Point counts of landbirds in bottomland hardwood forests of the Mississippi Alluvial Valley: How long and how many?
W.P. Smith, D.A. Wiedenfeld, P.B. Hanel, D.J. Twedt, R.P. Ford, R.J. Cooper
Winston Paul Smith, editor(s)
1993, Book chapter, Fourth meeting of the Southeast Management Working Group Partners in Flight
To quantify efficacy of point count sampling in bottomland hardwood forests, we examined the influence of point count duration on corresponding estimates of number of individuals and species recorded. To accomplish this we conducted a totalof 82 point counts 7 May-16 May 1992distributed among three habitats (Wet, Mesic, Dry) in...
Habitat use and survival rates of wintering American woodcocks in coastal South Carolina and Georgia
D.G. Krementz, J.T. Seginak
Jerry R. Longcore, Greg F. Sepik, editor(s)
1993, Biological Report 16
Habitat use and survival rates of radio-marked American woodcocks (Scolopax minor) were studied during the winter in coastal South Carolina (1988-89) and Georgia (1989-90). Soon after they arrived, woodcocks were captured in mist nets or in modified shorebird traps or by nightlighting. Each bird was weighed, aged, sexed,...
Puerto Rican parrot (Amazona vittata) reproductive behavior: a guideline for management of active nests
K.A. Wilson
1993, Book
One explanation for the failure of intensively monitored Puerto Rican Parrot nests is that observers may lack the information needed to evaluate pair behavior and to recognize behaviors indicative of nest problems. I examined the behavior of Puerto Rican Parrots during eight non-problematic and six problematic nesting attempts to...
Mineral resource assessment of rare-earth elements, thorium, titanium, and uranium in the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina
Frank G. Lesure, Gary C. Curtin, David L. Daniels, John C. Jackson
1993, Miscellaneous Field Studies Map 2198-E
Mineral resources of the Greenville 1° x 2° quadrangle, South Carolina, Georgia, and North Carolina, were assessed between 1984 and 1990 under the Conterminuous United States Mineral Assessment Program (CUSMAP) of the U.S. Geological Survey (USGS). The mineral resource assessments were made on the basis of geologic, geochemical, and geophysical...
Mineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado
Nora K. Foley, Stanton W. Caddey, Craig B. Byington, David M. Vardiman
1993, Professional Paper 1537
Gold-rich adularia-sericite-type mineralization occurs near the southern margin of the San Luis caldera, at the intersection of the Equity fault and the northern extension of the Amethyst fault system. Mineralized rock is confined primarily to steeply dipping structures in silicified rhyolite and dacite. Intense sericitic alteration occurs at higher levels...
The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um)
Roger N. Clark, Gregg A. Swayze, Andrea J. Gallagher, Trude King, Wendy M. Calvin
1993, Open-File Report 93-592
We have developed a digital reflectance spectral library, with management and spectral analysis software. The library includes 498 spectra of 444 samples (some samples include a series of grain sizes) measured from approximately 0.2 to 3.0 um . The spectral resolution (Full Width Half Maximum) of the reflectance data is...
The Seaman volcanic center—A rare middle Tertiary stratovolcano in southern Nevada
E. A. Du Bray
1993, Bulletin 2052
No abstract available....
Guidelines for the processing and quality assurance of benthic invertebrate samples collected as part of the National Water-Quality Assessment Program
T. F. Cuffney, M. E. Gurtz, M. R. Meador
1993, Open-File Report 93-407
Benthic invertebrate samples are collected as part of the U.S. Geological Survey's National Water-Quality Assessment Program. This is a perennial, multidisciplinary program that integrates biological, physical, and chemical indicators of water quality to evaluate status and trends and to develop an understanding of the factors controlling observed water quality. The...
Can rain cause volcanic eruptions?
Larry G. Mastin
1993, Open-File Report 93-445
Volcanic eruptions are renowned for their violence and destructive power. This power comes ultimately from the heat and pressure of molten rock and its contained gases. Therefore we rarely consider the possibility that meteoric phenomena, like rainfall, could promote or inhibit their occurrence. Yet from time to time observers have...
International strategic minerals inventory summary report; rare-earth oxides
W.D. Jackson, Grey Christiansen
1993, Circular 930-N
Bastnaesite, monazite, and xenotime are currently the most important rare-earth minerals. Bastnaesite occurs as a primary mineral in carbonatites. Monazite and xenotime also can be found in primary deposits but are recovered principally from heavy-mineral placers that are mined for titanium or tin. Each of these minerals has a different...
Emplacement and differentiation of the york haven diabase sheet, Pennsylvania
M. T. Mangan, B.D. Marsh, A.J. Froelich, D. Gottfried
1993, Journal of Petrology (34) 1271-1302
Many of the high-Ti quartz-normative tholeiitic intrusive sheets in the early Mesozoic rift basins of the Eastern USA exhibit lateral differentiation from mafic cumulate units, through diabase, to relatively evolved iron-rich rock types. We have investigated a representative example in detail, the York Haven sheet in the Gettysburg basin of...
Foraging ecology as related to the distribution of planktivorous auklets in the Bering Sea
George L. Hunt Jr., Nancy M. Harrison, John F. Piatt
1993, Conference Paper, The status, ecology and conservation of marine birds of the North Pacific
We review recent accounts of the foraging ecologies of five species of small auklets found in the Bering Sea. These birds eat a wide variety of zooplankton and micronekton. Least Auklets Aethia pusilla and Whiskered Auklets A. pygmaea, as far as is known, primarily eat copepods, whereas Created Auklets A. cristatella appear to specialize...
A new anoline lizard (Phenacosaurus) from the highland of Cerro de la Neblina, Southern Venezuela
C.W. Myers, E.E. Williams, R.W. McDiarmid
1993, American Museum Novitates (No. 3070)
Phenacosaurus neblininus, new species, was discovered during the 1984-1985 expedition to Cerro de la Neblina on the Venezuelan-Brazilian border. It was found at several highland camps (> 1600 m) but seems unaccountably rare, with only six specimens collected. The closest relative of this lizard may be another new species (Williams...
Differentiation of volcanic ash-fall and water-borne detrital layers in the Eocene Senakin coal bed, Tanjung Formation, Indonesia
Leslie F. Ruppert, T.A. Moore
1993, Organic Geochemistry (20) 233-247
The Sangsang deposit of the Eocene Senakin coal bed, Tanjung Formation, southeastern Kalimantan, Indonesia, contains 11 layers, which are thin (<5 cm) and high in ash (> 70%). These layers are characterized by their pelitic macroscopic texture. Examination of eight of the layers by scanning-electron microscopy, energy-dispersive X-ray, and X-ray...
Fire history of southeastern Glacier National Park: Missouri River Drainage
Stephen W. Barrett
1993, Report
In 1982, Glacier National Park (GNP) initiated long-term studies to document the fire history of all forested lands in the 410,000 ha. park. To date, studies have been conducted for GNP west of the Continental Divide (Barrett et al. 1991), roughly half of the total park area. These...
Winter phytoplankton dynamics in a subalpine lake, Colorado, U.S.A
S. A. Spaulding, J. V. Ward, Jill Baron
1993, Archiv fuer Hydrobiologie (129) 179-198
The temporal dynamics of phytoplankton were examined in The Loch, a subalpine lake in Rocky Mountain National Park, over the winter seasons of 1987-88 and 1988-89. The Loch was ice-covered from early November until early to mid May. The pattern of phytoplankton biovolume during ice-cover was consistent between the two...
The Pajarito Plateau: A bibliography
Frances Joan Mathien, Charlie R. Steen, Craig D. Allen
1993, NPS Southwest Cultural Resources Center Professional Paper 49
This bibliography is the result of two initially independent projects. As the consulting archaeologist at Los Alamos National Laboratory (LANL), Charlie R. Steen collected entries at the suggestion of the staff of the Environmental Surveillance Group of the Health, Safety, and Environmental Division, HSE-8. The primary purpose was to aid...
Intensity and duration of chemical weathering: An example from soil clays of the southeastern Koolau Mountains, Oahu, Hawaii
Mark J. Johnsson, Stephen D. Ellen, Mary Anne McKittrick
1993, Special Paper of the Geological Society of America (284) 147-170
Orographic precipitation on the southern flank of the southeastern Koolau Mountains produces a pronounced precipitation gradient. The corresponding gradient in the intensity of the chemical weathering environment provides an opportunity to address the effects of varying chemical weathering intensity on the composition of clay-size weathering products in soils developed...
