Chronology of polyphase extension in the Windermere Hills, northeast Nevada
K.J. Mueller, P.K. Cerveny, M. E. Perkins, L.W. Snee
1999, Geological Society of America Bulletin (111) 11-27
Fission-track and 40Ar/39Ar dating and chemical correlation of volcanic strata exposed in the Windermere Hills and northern Pequop Mountains, northeast Nevada, indicate a protracted, polyphase history of Tertiary (late Eocene–late Miocene) extension along the northern margin of a major Cordilleran metamorphic core complex. Early...
Tectonic and regional metamorphic implications of the discovery of Middle Ordovician conodonts in cover rocks east of the Green Mountain massif, Vermont
N. M. Ratcliffe, A. G. Harris, G. J. Walsh
1999, Canadian Journal of Earth Sciences (36) 371-382
Middle Ordovician (late Arenigian - early Caradocian) conodonts were recovered from a dolostone lens in carbonaceous schist 30 m below the base of the Pinney Hollow Formation in the Eastern Cover sequence near West Bridgewater, Vermont. These are the first reported fossils from the metamorphic cover sequence rocks east of...
Regional Vp, Vs, Vp/Vs, and Poisson's ratios across earthquake source zones from Memphis, Tennessee, to St. Louis, Missouri
R. D. Catchings
1999, Bulletin of the Seismological Society of America (89) 1591-1605
Models of P- and S-wave velocity, Vp/Vs ratios, Poisson's ratios, and density for the crust and upper mantle are presented along a 400-km-long profile trending from Memphis, Tennessee, to St. Louis, Missouri. The profile crosses the New Madrid seismic zone and reveals distinct regional variations in the crustal velocity structure...
Variations in water clarity and bottom albedo in Florida Bay from 1985 to 1997
R. P. Stumpf, M.L. Frayer, M.J. Durako, J. C. Brock
1999, Estuaries (22) 431-444
Following extensive seagrass die-offs of the late 1980s and early 1990s, Florida Bay reportedly had significant declines in water clarity due to turbidity and algal blooms. Scant information exists on the extent of the decline, as this bay was not investigated for water quality concerns before the die-offs and limited...
Reproductive biology and juvenile recruitment of the shinyrayed pocketbook, Lampsilis subangulata (Bivalvia: Unionidae) in the Gulf Coastal Plain
C. A. O’Brien, Jayne Brim-Box
1999, American Midland Naturalist (142) 129-140
The reproductive biology, glochidial morphology and recruitment of the federally endangered shinyrayed pocketbook, Lampsilis subangulata, were studied from May 1995 to July 1996 in the Flint River system, Georgia. Gravid female L. subangulata were found nine months of the year. On 19 May 1995, a L. subangulata was discovered releasing a superconglutinate,...
Reconstructing the history of eastern and central Florida Bay using mollusk-shell isotope records
R. B. Halley, L.M. Roulier
1999, Estuaries (22) 358-368
Stable isotopic ratios of carbon and oxygen (δ13C and δ18O) from mollusk shells reflect the water quality characteristics of Florida Bay and can be used to characterize the great temporal variability of the bay. Values of δ18O are directly influenced by temperature and evaporation and may be related to salinity,...
At-sea distribution of Spectacled Eiders: A 120-year-old mystery resolved
Margaret R. Petersen, William W. Larned, David C. Douglas
1999, The Auk (116) 1009-1020
The at-sea distribution of the threatened Spectacled Eider (Somateria fischeri) has remained largely undocumented. We identified migration corridors, staging and molting areas, and wintering areas of adult Spectacled Eiders using implanted satellite-transmitters in birds from each of the three extant breeding grounds (North Slope and Yukon-Kuskokwim Delta in Alaska and...
Trace-element geochemistry of metabasaltic rocks from the Yukon-Tanana Upland and implications for the origin of tectonic assemblages in east-central Alaska
Cynthia Dusel-Bacon, K.M. Cooper
1999, Canadian Journal of Earth Sciences (36) 1671-1695
We present major- and trace- element geochemical data for 27 amphibolites and six greenstones from three structural packages in the Yukon-Tanana Upland of east-central Alaska: the Lake George assemblage (LG) of Devono-Mississippian augen gneiss, quartz-mica schist, quartzite, and amphibolite; the Taylor Mountain assemblage (TM) of mafic schist and gneiss, marble,...
Surface phenology and satellite sensor-derived onset of greenness: An initial comparison
Mark D. Schwartz, Bradley C. Reed
1999, International Journal of Remote Sensing (20) 3451-3457
The objective of this work was to document the utility of phenological data derived from satellite sensors by comparing them with modelled phenology. Surface phenological model outputs (first leaf and first bloom dates) were correlated positively with satellite sensor-derived start of season (SOS) dates for 1991-1995 across the eastern United...
Consumption of rainbow smelt by walleye and salmonine fishes in eastern Lake Erie
D.W. Einhouse, M.T. Bur, F.C. Cornelius, R. Kenyon, C.P. Madenjian, P.S. Rand, K.L. Sztramko, L.D. Witzel
M. Munawar, T. Edsall, I.F. Munawar, editor(s)
1999, Book chapter, The state of Lake Erie: past, present and future
At present, rainbow smelt appear to represent a key component of the eastern Lake Erie fish community as they are the dominant prey for virtually every open water predator, and are harvested directly by an important Ontario commercial fishery. In response to concern over the status of rainbow smelt...
Bar-tailed Godwits Limosa lapponica in Alaska: A population estimate from the staging grounds
Robert E. Gill Jr., Brian J. McCaffery
1999, Wader Study Group Bulletin (88) 49-54
Bar-tailed Godwits Limosa lapponica were surveyed on their staging grounds in Alaska during September 1995 and 1997. The single high count of 94,000 birds closely matched that of counts from New Zealand and south-eastern Australia, the known non-breeding area for most of the baueri subspecies. Numbers recorded on the southern...
A Possible connection between the 1878 yellow fever epidemic in the southern United States and the 1877-78 El Niño episode
Henry F. Diaz, Gregory J. McCabe
1999, Bulletin of the American Meteorological Society (80) 21-27
One of the most severe outbreaks of yellow fever, a viral disease transmitted by the Aedes aegypti mosquito, affected the southern United States in the summer of 1878. The economic and human toll was enormous, and the city of Memphis, Tennessee, was one of the most affected. The authors suggest...
Structural and petrologic evolution of the Lihue basin and eastern Kauai, Hawaii
P.W. Reiners, B.K. Nelson, S. K. Izuka
1999, Geological Society of America Bulletin (111) 674-685
The topography of the eastern part of the Hawaiian island of Kauai is dominated by the Lihue basin, a large (∼110 km2) semicircular depression bounded by steep cliffs and partly filled by late rejuvenated-stage (or posterosional stage) volcanic material. As with other large,...
Prediction of gas production using well logs, Cretaceous of north-central Montana
T.C. Hester
1999, Mountain Geologist (36) 85-98
Cretaceous gas sands underlie much of east-central Alberta and southern Saskatchewan, eastern Montana, western North Dakota, and parts of South Dakota and Wyoming. Estimates of recoverable biogenic methane from these rocks in the United States are as high as 91 TCF. In northern Montana, current production is localized around a...
Avian cholera
Milton Friend
1999, Information and Technology Report 1999-0001
Avian cholera is a contagious disease resulting from infection by the bacterium Pasteurella multocida. Several subspecies of bacteria have been proposed for P. multocida, and at least 16 different P. multocida serotypes or characteristics of antigens in bacterial cells that differentiate bacterial variants from each other have been recognized....
Mercury concentration in coal — Unraveling the puzzle
B. Toole-O’Neil, S.J. Tewalt, R. B. Finkelman, D.J. Akers
1999, Fuel (78) 47-54
Based on data from the US Geological Survey's COALQUAL database, the mean concentration of mercury in coal is approximately 0.2 μg g−1. Assuming the database reflects in-ground US coal resources, values for conterminous US coal areas range from 0.08 μg g−1 for coal in the San Juan and Uinta regions to 0.22 μg g−1 for the Gulf Coast...
An autogamous rainforest species of Schiedea (Caryophyllaceae) from East Maui, Hawaiian Islands
W.L. Wagner, S.G. Weller, A.K. Sakai, A.C. Medeiros
1999, Novon (9) 284-287
A new autogamous species of Schiedea is described and illustrated. It is known only from cliff habitat in rainforest on a single ridge in the Natural Area Reserve, Hanawi, East Maui. With the addition of this species there are 28 species in this endemic Hawaiian genus. The new species appears...
Occurrence and transport of total mercury and methyl mercury in the Sacramento River Basin, California
Joseph L. Domagalski
1999, Journal of Geochemical Exploration (64) 277-291
Mercury poses a water-quality problem for California's Sacramento River, a large river with a mean annual discharge of over 650 m3/s. This river discharges into the San Francisco Bay, and numerous fish species of the bay and river contain mercury levels high enough to affect human health if consumed. Two...
U-Pb zircon age of metafelsite from the Pinney Hollow formation: Implications for the development of the Vermont Appalachians
Gregory J. Walsh, John Aleinikoff
1999, American Journal of Science (299) 157-170
The Pinney Hollow Formation of central Vermont is part of a rift-clastic to drift-stage sequence of cover rocks deposited on the Laurentian margin during the development of the Iapetan passive margin in Late Proterozoic to Cambrian time. Conventional U-Pb zircon data indicate an age of 571+ or -5 Ma for...
The search for a source rock for the giant Tar Sand triangle accumulation, southeastern Utah
J. E. Huntoon, P. L. Hansley, N. D. Naeser
1999, American Association of Petroleum Geologists Bulletin (83) 467-495
A large proportion (about 36%) of the worlds oil resource is contained in accumulations of heavy oil or tar. In these large deposits of degraded oil, the oil in place represents only a fraction of what was present at the time of accumulation. In many of these deposits, the source...
Three-dimensional velocity structure of Siletzia and other accreted terranes in the Cascadia forearc of Washington
T. Parsons, R.E. Wells, M. A. Fisher, E. Flueh, Uri S. ten Brink
1999, Journal of Geophysical Research B: Solid Earth (104) 18015-18039
Eocene mafic crust with high seismic velocities underlies much of the Oregon and Washington forearc and acts as a backstop for accretion of marine sedimentary rocks from the obliquely subducting Juan de Fuca slab. Arc-parallel migration of relatively strong blocks of this terrane, known as Siletzia, focuses upper crustal deformation...
Prediction of episodic acidification in North-eastern USA: An empirical/mechanistic approach
T.D. Davies, M. Tranter, P.J. Wigington Jr., K.N. Eshleman, N.E. Peters, J. Van Sickle, David R. DeWalle, Peter S. Murdoch
1999, Hydrological Processes (13) 1181-1195
Observations from the US Environmental Protection Agency's Episodic Response Project (ERP) in the North-eastern United States are used to develop an empirical/mechanistic scheme for prediction of the minimum values of acid neutralizing capacity (ANC) during episodes. An acidification episode is defined as a hydrological event during which ANC decreases. The...
Thermal regime of the Great Basin and its implications for enhanced geothermal systems and off-grid power
John H. Sass, Mark A. Walters
1999, Geothermal Resources Council Transactions (23) 211-218
The Basin and Range Province of the Western United States covers most of Nevada and parts of adjoining states. It was formed by east-west tectonic extension that occurred mostly between 50 and 10 Ma, but which still is active in some areas. The northern Basin and Range, also known as...
Late Quaternary slip rate and seismic hazards of the West Klamath Lake fault zone near Crater Lake, Oregon Cascades
C. R. Bacon, M. A. Lanphere, D.E. Champion
1999, Geology (27) 43-46
Crater Lake caldera is at the north end of the Klamath graben, where this N10°W-trending major Basin and Range structure impinges upon the north-south–trending High Cascades volcanic arc. East-facing normal faults, typically 10–15 km long, form the West Klamath Lake fault zone, which bounds the graben on its west side....
Present-day deformation across the Basin and Range Province, western United States
W. Thatcher, G.R. Foulger, B.R. Julian, J. Svarc, E. Quilty, G.W. Bawden
1999, Science (283) 1714-1718
The distribution of deformation within the Basin and Range province was determined from 1992, 1996, and 1998 surveys of a dense, 800-kilometer- aperture, Global Positioning System network, Internal deformation generally follows the pattern of Holocene fault distribution and is concentrated near the western extremity of the province, with lesser amounts...
