The Reocín zinc-lead deposit, Spain: paleomagnetic dating of a late Tertiary ore body
David T. A. Symons, Michael T. Lewchuk, Kazuo Kawasaki, Francisco Velasco, David L. Leach
2009, Mineralium Deposita (44) 867-880
The Reocín mine in northern Spain’s Basque–Cantabrian basin exploited a world-class Mississippi Valley-type Zn–Pb deposit. Its epigenetic mineralization is in Urgonian 116 ± 1 Ma dolomitized limestones of the Santillana syncline, which was formed by Oligocene and mid Miocene pulses of the Pyrenean orogeny. Paleomagnetic results (22 sites, 274 specimens) in mineralization isolated...
Genetic and serological typing of European infectious haematopoietic necrosis virus (IHNV) isolates
T. Johansson, K. Einer-Jensen, W. Batts, P. Ahrens, C. Bjorkblom, Gael Kurath, H. Bjorklund, N. Lorenzen
2009, Diseases of Aquatic Organisms (86) 213-221
Infectious haematopoietic necrosis virus (IHNV) causes the lethal disease infectious haematopoietic necrosis (IHN) in juvenile salmon and trout. The nucleocapsid (N) protein gene and partial glycoprotein (G) gene (nucleotides 457 to 1061) of the European isolates IT-217A, FR-32/87, DE-DF 13/98 11621, DE-DF 4/99-8/99, AU-9695338 and RU-FR1 were sequenced and compared...
Diurnal stream habitat use of juvenile Atlantic salmon, brown trout and rainbow trout in winter
J. H. Johnson, K.A. Douglass
2009, Fisheries Management and Ecology (16) 352-359
The diurnal winter habitat of three species of juvenile salmonids was examined in a tributary of Skaneateles Lake, NY to compare habitat differences among species and to determine if species/age classes were selecting specific habitats. A total of 792 observations were made on the depth, velocity, substrate and cover (amount...
Whole-body cortisol response of zebrafish to acute net handling stress
J.M. Ramsay, G.W. Feist, Z.M. Varga, M. Westerfield, M.L. Kent, C.B. Schreck
2009, Aquaculture (297) 157-162
Zebrafish, Danio rerio, are frequently handled during husbandry and experimental procedures in the laboratory, yet little is known about the physiological responses to such stressors. We measured the whole-body cortisol levels of adult zebrafish subjected to net stress and air exposure at intervals over a 24 h period; cortisol recovered...
The geology of Hotei Regio, Titan: Correlation of Cassini VIMS and RADAR
L.A. Soderblom, R. H. Brown, J.M. Soderblom, J. W. Barnes, R. L. Kirk, Christophe Sotin, R. Jaumann, D. J. MacKinnon, D.W. Mackowski, K. H. Baines, B. J. Buratti, R. N. Clark, P. D. Nicholson
2009, Icarus (204) 610-618
Joint Cassini VIMS and RADAR SAR data of ∼700-km-wide Hotei Regio reveal a rich collection of geological features that correlate between the two sets of images. The degree of correlation is greater than anywhere else seen on Titan. Central to Hotei Regio is a basin filled with cryovolcanic flows that...
High-frequency Rayleigh-wave method
J. Xia, R. D. Miller, Y. Xu, Y. Luo, C. Chen, J. Liu, J. Ivanov, C. Zeng
2009, Earth Science (20) 563-579
High-frequency (≥2 Hz) Rayleigh-wave data acquired with a multichannel recording system have been utilized to determine shear (S)-wave velocities in near-surface geophysics since the early 1980s. This overview article discusses the main research results of high-frequency surface-wave techniques achieved by research groups at the Kansas Geological...
Seismic reflection characteristics of naturally-induced subsidence affecting transportation
R. D. Miller, J. Xia, D.W. Steeples
2009, Conference Paper, Journal of Earth Science
High-resolution seismic reflections have been used effectively to investigate sinkholes formed from the dissolution of a bedded salt unit found throughout most of Central Kansas. Surface subsidence can have devastating effects on transportation structures. Roads, rails, bridges, and pipelines can even be dramatically affected by minor ground instability. Areas susceptible...
A comparison of pre- and post-remediation water quality, Mineral Creek, Colorado
R.L. Runkel, K.E. Bencala, B. A. Kimball, K. Walton-Day, P. L. Verplanck
2009, Hydrological Processes (23) 3319-3333
Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic...
Incised channel fills containing conifers indicate that seasonally dry vegetation dominated Pennsylvanian tropical lowlands
H. J. Falcon-Lang, W.J. Nelson, S. Elrick, C.V. Looy, P.R. Ames, William A. DiMichele
2009, Geology (37) 923-926
The idea that the Pennsylvanian tropical lowlands were temporally dominated by rainforest (i.e., the Coal Forest) is deeply ingrained in the literature. Here we challenge two centuries of research by suggesting that this concept is based on a taphonomic artifact, and that seasonally dry vegetation dominated instead. This controversial finding...
New Permian durhaminid cerioid corals from east-central California
C.H. Stevens, P. Stone
2009, Journal of Paleontology (83) 946-953
Permian colonial corals from Artinskian to Kungurian strata in the Conglomerate Mesa area, Inyo Mountains, east-central California, include five new species, one of which is assigned to a new genus. The new taxa are: Malpaisia maceyi n. gen. and n. sp., Pararachnastraea bellula n. sp., P. delicata n. sp., P....
Elevated naturally occurring arsenic in a semiarid oxidizing system, Southern High Plains aquifer, Texas, USA
Bridget R. Scanlon, J.-P. Nicot, R.C. Reedy, D. Kurtzman, A. Mukherjee, D. Kirk Nordstrom
2009, Applied Geochemistry (24) 2061-2071
High groundwater As concentrations in oxidizing systems are generally associated with As adsorption onto hydrous metal (Al, Fe or Mn) oxides and mobilization with increased pH. The objective of this study was to evaluate the distribution, sources and mobilization mechanisms of As in the Southern High Plains (SHP) aquifer, Texas,...
Effects of introduced fish on macroinvertebrate communities in historically fishless headwater and kettle lakes
Emily Gaenzle Schilling, Cynthia S. Loftin, Alexander D. Huryn
2009, Biological Conservation (142) 3030-3038
Widespread fish introductions have led to a worldwide decline in the number of fishless lakes and their associated communities. Studies assessing effects of fish stocking on native communities in historically fishless lakes have been limited to high-elevation headwater lakes stocked with non-native trout. Little is known about the effect of...
Feeding ecology of lake whitefish larvae in eastern Lake Ontario
James H. Johnson, James E. McKenna, Marc A. Chalupnicki, Tim Wallbridge, Rich Chiavelli
2009, Journal of Great Lakes Research (35) 603-607
We examined the feeding ecology of larval lake whitefish (Coregonus clupeaformis) in Chaumont Bay, Lake Ontario, during April and May 2004-2006. Larvae were collected with towed ichthyoplankton nets offshore and with larval seines along the shoreline. Larval feeding periodicity was examined from collections made at 4-h intervals over one 24-h...
Combining particle-tracking and geochemical data to assess public supply well vulnerability to arsenic and uranium
S.R. Hinkle, L. J. Kauffman, M.A. Thomas, C. J. Brown, K. A. McCarthy, S. M. Eberts, Michael R. Rosen, B. G. Katz
2009, Journal of Hydrology (376) 132-142
Flow-model particle-tracking results and geochemical data from seven study areas across the United States were analyzed using three statistical methods to test the hypothesis that these variables can successfully be used to assess public supply well vulnerability to arsenic and uranium. Principal components analysis indicated that arsenic and uranium concentrations...
Quantifying uncertainty in discharge measurements: A new approach
J.E. Kiang, T.A. Cohn, R.R. Mason
2009, Conference Paper, Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
The accuracy of discharge measurements using velocity meters and the velocity-area method is typically assessed based on empirical studies that may not correspond to conditions encountered in practice. In this paper, a statistical approach for assessing uncertainty based on interpolated variance estimation (IVE) is introduced. The IVE method quantifies all...
Genetic susceptibility to chronic wasting disease in free-ranging white-tailed deer: complement component C1q and Prnp polymorphisms
Julie A. Blanchong, Dennis M. Heisey, Kim T. Scribner, Scot V. Libants, Chad Johnson, Judd M. Aiken, Julia A. Langenberg, Michael D. Samuel
2009, Infection, Genetics and Evolution (9) 1329-1335
The genetic basis of susceptibility to chronic wasting disease (CWD) in free-ranging cervids is of great interest. Association studies of disease susceptibility in free-ranging populations, however, face considerable challenges including: the need for large sample sizes when disease is rare, animals of unknown pedigree create a risk of spurious results...
Monitoring urban land cover change by updating the national land cover database impervious surface products
George Z. Xian, Collin G. Homer
2009, Conference Paper, 2009 Joint urban remote sensing event
The U.S. Geological Survey (USGS) National Land Cover Database (NLCD) 2001 is widely used as a baseline for national land cover and impervious conditions. To ensure timely and relevant data, it is important to update this base to a more recent time period. A prototype method was developed to update...
Pink shrimp as an indicator for restoration of everglades ecosystems
Joan A. Browder, M. B. Robblee
2009, Ecological Indicators (9)
The pink shrimp, Farfantepenaeus duorarum, familiar to most Floridians as either food or bait shrimp, is ubiquitous in South Florida coastal and offshore waters and is proposed as an indicator for assessing restoration of South Florida's southern estuaries: Florida Bay, Biscayne Bay, and the mangrove estuaries of the lower southwest...
On near-source earthquake triggering
T. Parsons, A.A. Velasco
2009, Journal of Geophysical Research B: Solid Earth (114)
[1] When one earthquake triggers others nearby, what connects them? Two processes are observed: static stress change from fault offset and dynamic stress changes from passing seismic waves. In the near-source region (r ≤ 50 km for M ∼ 5 sources) both processes may be operating, and since both...
Monitoring of land subsidence and ground fissures in Xian, China 2005-2006: Mapped by sar Interferometry
C.Y. Zhao, Q. Zhang, X.-L. Ding, Z. Lu, C.S. Yang, X.M. Qi
2009, Environmental Geology (58) 1533-1540
The City of Xian, China, has been experiencing significant land subsidence and ground fissure activities since 1960s, which have brought various severe geohazards including damages to buildings, bridges and other facilities. Monitoring of land subsidence and ground fissure activities can provide useful information for assessing the extent of, and mitigating...
Audiomagnetotelluric investigation of Snake Valley, eastern Nevada and western Utah
Darcy McPhee, Keith Pari, Frank Baird
2009, Geology and Geologic Resources and Issues of Western Utah 287-298
Audiomagnetotelluric (AMT) data along four profiles in western Snake Valley and the corresponding two-dimensional (2-D) inverse models reveal subsurface structures that may be significant to ground-water investigations in the area. The AMT method is a valuable tool for estimating the electrical resistivity of the earth over depth ranges from...
Historic geomorphology of the San Pedro River: archival and physical evidence
R. Hereford, Julio L. Betancourt
J. Stromberg, B. Tellman, editor(s)
2009, Book chapter, Ecology and Conservation of Desert Riparian Ecosystems: The San Pedro River Example
On baseline corrections and uncertainty in response spectrafor baseline variations commonly encountered in digital accelerograph records
Sinan Akkar, David M. Boore
2009, Bulletin of the Seismological Society of America (99) 1671-1690
Most digital accelerograph recordings are plagued by long-period drifts, best seen in the velocity and displacement time series obtained from integration of the acceleration time series. These drifts often result in velocity values that are nonzero near the end of the record. This is clearly unphysical and can lead to...
Mesozoic magmatism in an upper- to middle-crustal section through the Cordilleran continental margin arc, eastern Transverse Ranges, California
S.K. Needy, J. L. Anderson, J. L. Wooden, R.J. Fleck, A. P. Barth, Scott R. Paterson, V. Memeti, G.S. Pignotta
2009, Special Paper of the Geological Society of America 187-218
The eastern Transverse Ranges provide essentially continuous exposure for >100 km across the strike of the Mesozoic Cordilleran orogen. Thermobarometric calculations based on hornblende and plagioclase compositions in Mesozoic plutonic rocks show that the fi rst-order distribution of rock units resulted from differential Laramide exhumation. Mesozoic supracrustal rocks are preserved...
First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach
B.A. Ebel, B.B. Mirus, C.S. Heppner, J.E. VanderKwaak, K. Loague
2009, Hydrological Processes (23) 1949-1959
Distributed hydrologic models capable of simulating fully-coupled surface water and groundwater flow are increasingly used to examine problems in the hydrologic sciences. Several techniques are currently available to couple the surface and subsurface; the two most frequently employed approaches are first-order exchange coefficients (a.k.a., the surface conductance method) and enforced...
