Flooding mortality and habitat renewal for least terns and piping plovers
John G. Sidle, D.E. Carlson, E.M. Kirsch, J.J. Dinan
1992, Colonial Waterbirds (15) 132-136
We observed extensive mortality (eggs and chicks) of the endangered interior population of the Least Tern (Sterna antillarum) and threatened Piping Plover (Charadrius melodus) caused by natural flooding during the 1990 breeding season along the Platte River, Nebraska USA. Aerial videography of the Platte River before and after the flood...
A monoclinic, pseudo-orthorhombic Au-Hg mineral of potential economic significance in Pleistocene Snake River alluvial deposits of southeastern Idaho
G. A. Desborough, E.E. Foord
1992, Canadian Mineralogist (30) 1033-1038
A mineral with the approximate composition of Au94Hg6 - Au88Hg12 (atomic %) has been identified in Pleistocene Snake River alluvial deposits. The gold-mercury mineral occurs as very small grains or as polycrystalline masses composed of subhedral to nearly euhedral attached crystals. Vibratory cold-polishing techniques with 0.05-??m alumina abrasive for polished...
Mixed-mode isolation of triazine metabolites from soil and aquifer sediments using automated solid-phase extraction
M. S. Mills, E.M. Thurman
1992, Analytical Chemistry (64) 1985-1990
No abstract available. ...
New look at regional flood-frequency relations for arid lands
H. W. Hjalmarson, B. E. Thomas
1992, Journal of Hydraulic Engineering (118) 868-886
A new method is proposed that combines records for several streamflow-gaging stations, as in the station-year approach, and produces regional flood-frequency relations using an iterative regression technique. This technique eliminates the need to extrapolate the flood-frequency relation to the flood probability of interest. The resulting multiparameter regional flood-frequency relation is...
Determination of malachite green and its leuco form in water
J. L. Allen, J.R. Meinertz, J.E. Gofus
1992, Journal of AOAC International (75) 646-649
Liquid chromatographic (LC) analysis can detect malachite green residues in water at less than 10µg/L. Water samples were concentrated on disposable diol columns, eluted with 0.05M p-toluenesulfonic acid in methanol, and determined by reversed- phase LC. When combined with a lead oxide postcolumn reactor, the LC method can simultaneously...
U-Pb dating of uranium deposits in collapse breccia pipes of the Grand Canyon region
K.R. Ludwig, K. R. Simmons
1992, Economic Geology (87) 1747-1765
Two major periods of uranium mineralization are indicated by U-Pb isotope dating of uranium ores from collapse breeeia pipes in the Grand Canyon region, northern Arizona. The Hack 2 and 3, Kanab North, and EZ 1 and 2 orebodies apparently formed in the interval of 200 + or - 20...
Mid-Mesozoic (Mid-Jurassic to Early Cretaceous) evolution of the Georges Bank Basin, U.S. North Atlantic outer continental shelf: Sedimentology of the Conoco 145-1 well
L.J. Poppe, C. W. Poag, R.W. Stanton
1992, Sedimentary Geology (75) 171-192
The Conoco 145-1 exploratory well, located in the southeastern portion of the Georges Bank Basin, was drilled to a total depth of 4303 m below the sea floor. The oldest sedimentary rocks sampled are of Middle Jurassic age (Late Bathonian-Callovian). A dolomite-limestone-evaporite sequence dominates the section below 3917 m; limestone...
Extraction of whole versus ground source rocks: Fundamental petroleum geochemical implications including oil-source rock correlation
L.C. Price, J.L. Clayton
1992, Geochimica et Cosmochimica Acta (56) 1213-1222
In petroleum geochemistry, extractable hydrocarbons (HCs) in source rocks have typically been studied by grinding the rock to a fine powder (≤100 mesh) and then extracting the HCs from the rock with a solvent. This procedure carries the implicit assumption that the HCs are homogeneously distributed throughout the rock. However,...
Determination of hatching date for eggs of black-crowned night-herons, snowy egrets and great egrets
T. W. Custer, G.W. Pendleton, R.W. Roach
1992, Journal of Field Ornithology (63) 145-154
Floatation of eggs in water and specific gravity of eggs of Black-crowned Night-Herons (Nycticorax nycticorax ), Snowy Egrets (Egretta thula ) and Great Egrets (Casmerodius albus ) were evaluated as methods to determine date of hatching. Although specific gravity was a better predictor of hatching date than egg...
Laser microprobe analyses of Cl, Br, I, and K in fluid inclusions: Implications for sources of salinity in some ancient hydrothermal fluids
J.K. Böhlke, J.J. Irwin
1992, Geochimica et Cosmochimica Acta (56) 203-225
The relative concentrations of Cl, Br, I, and K in fluid inclusions in hydrothermal minerals were measured by laser microprobe noble gas mass spectrometry on irradiated samples containing 10−10 to 10−8 L of fluid. Distinctive halogen signatures indicate contrasting sources of fluid salinity in fluid inclusions from representative “magmatic” (St....
An unusual occurrence of arsenic-bearing pyrite in the Upper Freeport coal bed, West-Central Pennsylvania
L.F. Ruppert, J.A. Minkin, J. J. McGee, C. B. Cecil
1992, Energy & Fuels (6) 120-125
Scanning electron microscopy and electron microprobe analysis were used to identify a rare type of As-bearing pyrite in selected specific gravity separates from the Pennsylvanian age Upper Freeport coal bed, west-central Pennsylvania. Arsenic was detected mainly in cell-wall replacement pyrite where concentrations ranged from nondetectable to 1.9 wt %. Although...
Deep Sea Drilling Project Site 612 bolide event: New evidence of a late Eocene impact-wave deposit and a possible impact site, US east coast
W. Wei, C. Wylie Poag, Lawrence J. Poppe, David W. Folger, David S. Powars, Robert B. Mixon, Lucy E. Edwards, Scott Bruce
1992, Geology (20) 771-774
A remarkable >60-m-thick, upward-fining, polymictic, marine boulder bed is distributed over >15 000 km2 beneath Chesapeake Bay and the surrounding Middle Atlantic Coastal Plain and inner continental shelf. The wide varieties of clast lithologies and microfossil assemblages were derived from at least seven known Cretaceous, Paleocene, and Eocene stratigraphic units....
A glacier peak and Mount Saint Helens J volcanic ash couplet and the timing of deglaciation in the Colville Valley area, Washington
P. E. Carrara, D.A. Trimble
1992, Canadian Journal of Earth Sciences (29) 2397-2405
A Late Pleistocene volcanic ash couplet consisting of a Glacier Peak ash layer and an underlying Mount Saint Helens J ash layer has been identified at three sites in the Colville Valley area of northeastern Washington. This ash couplet has been reported as far east as northwestern Montana and therefore...
Upper Pleistocene turbidite sand beds and chaotic silt beds in the channelized, distal, outer-fan lobes of the Mississippi fan
C.H. Nelson, D.C. Twichell, W. C. Schwab, H.J. Lee, Neil H. Kenyon
1992, Geology (20) 693-696
Cores from a Mississippi outer-fan depositional lobe demonstrate that sublobes at the distal edge contain a complex local network of channelized-turbidite beds of graded sand and debris-flow beds of chaotic silt. Off-lobe basin plains lack siliciclastic coarse-grained beds. The basin-plain mud facies exhibit low acoustic backscatter on SeaMARC IA sidescan...
The Galileo Solid-State Imaging experiment
M. J. S. Belton, K.P. Klaasen, M.C. Clary, J. L. Anderson, C.D. Anger, M. H. Carr, C. R. Chapman, M. E. Davies, R. Greeley, D. Anderson, L.K. Bolef, T.E. Townsend, R. Greenberg, J. W. Head III, G. Neukum, C.B. Pilcher, J. Veverka, P.J. Gierasch, F. P. Fanale, A.P. Ingersoll, H. Masursky, D. Morrison, James B. Pollack
1992, Space Science Reviews (60) 413-455
The Solid State Imaging (SSI) experiment on the Galileo Orbiter spacecraft utilizes a high-resolution (1500 mm focal length) television camera with an 800 ?? 800 pixel virtual-phase, charge-coupled detector. It is designed to return images of Jupiter and its satellites that are characterized by a combination of sensitivity levels, spatial...
The extent of temporal smearing in surface-temperature histories derived from borehole temperature measurements
Gary D. Clow
1992, Global and Planetary Change (6) 81-86
The ability of borehole temperature data to resolve past climatic events is investigated using Backus-Gilbert inversion methods. Two experimental approaches are considered: (1) the data consist of a single borehole temperature profile, and (2) the data consist of climatically-induced temperature transients measured within a borehole during a monitoring experiment. The...
The oldest known Rocky Mountain bristlecone pines (Pinus aristata Engelm.)
F.C. Brunstein, D.K. Yamaguchi
1992, Arctic and Alpine Research (24) 253-256
We have found 12 living Rocky Mountain bristlecone pines (Pinus aristata) more than 1600 yr old, including four that are more than 2100 yr old, on Black Mountain, near South Park, and on Almagre Mountain, in the southern Front Range, Colorado. A core from the oldest of these trees has...
Field guide: Gold-copper-silver deposits of the New World District Northwest Geology
J. E. Elliot, A. R. Kirk, T.W. Johnson
J. E. Elliott, editor(s)
1992, Book chapter, Guidebook for the Red Lodge-Beartooth Mountains-Stillwater area
No abstract available ...
Petrology of lavas from episodes 2-47 of the Puu Oo eruption of Kilauea Volcano, Hawaii: Evaluation of magmatic processes
M.O. Garcia, J.M. Rhodes, E.W. Wolfe, G. E. Ulrich, R.A. Ho
1992, Bulletin of Volcanology (55) 1-16
The Puu Oo eruption of Kilauea Volcano in Hawaii is one of its largest and most compositionally varied historical eruptions. The mineral and whole-rock compositions of the Puu Oo lavas indicate that there were three compositionally distinct magmas involved in the eruption. Two of these magmas were differentiated (<6.8 wt%...
The cycling of iron and manganese in the water column of Lake Sammamish, Washington
Laurie S. Balistrieri, J.W. Murray, B. Paul
1992, Limnology and Oceanography (37) 510-528
Processes controlling the distribution and mobility of Fe and Mn in Lake Sammamish, Washington, a seasonally anoxic lake, are deduced from a year‐long monthly study of physical, chemical, and biological parameters in the lake. Inventories of dissolved Mn and Fe in the bottom waters increase as the...
Habitat use by a headwater stream fish community in North-central Pennsylvania
J. H. Johnson, D. S. Dropkin, P.G. Shaffer
1992, Rivers (3) 69-79
Implications for faunal habitat related to altered macrophyte structure in regulated lakes in northern Minnesota
Douglas A. Wilcox, James E. Meeker
1992, Wetlands (12) 192-203
Water-level regulation has altered the plant species composition and thus the structure of nearshore aquatic macrophyte communities in two regulated lakes in northern Minnesota as compared with a nearby unregulated lake. Results of previous faunal studies in the regulated lakes were used as a basis for assessing the effects of...
Accumulation of mercury by aufwuchs in Wisconsin seepage lakes: Implications for monitoring
W. Gregory Cope, Ronald G. Rada
1992, Archives of Environmental Contamination and Toxicology (23) 172-178
We examined temporal variation in the total Hg content of aufwuchs collected from artificial substrates in 11 seepage lakes in north-central Wisconsin and its relation to the Hg content of resident yellow perch Perca flavescens from the lakes. Dry weight concentrations of Hg in aufwuchs varied temporally, as follows: summer/fall 1985 > summer 1985 > spring/summer...
The boulder darter: a conservation challenge
N.M. Burkhead, J.D. Williams
1992, U.S. Fish and Wildlife Service Endangered Species Technical Bulletin (17) 4-6
Abstract not supplied at this time...
Withering syndrome is spreading
K. D. Lafferty, A. M. Kuris
1992, A'lul'quoy (5) 15-15
No abstract available....
