Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Contaminants and sea ducks in Alaska and the circumpolar region Contaminants and sea ducks in Alaska and the circumpolar region
We review nesting sea duck population declines in Alaska during recent decades and explore the possibility that contaminants may be implicated. Aerial surveys of the surf scoter (Melanitta perspicillata), white-winged scoter (M. fusca), black scoter (M. nigra), oldsqaw (Clangula hyemalis), spectacled eider (Somateria fischeri), and Steller's eider (Polysticta stellei) show long-term...
Authors
Charles Henny, Deborah D. Rudis, Thomas J. Roffe, Everett Robinson-Wilson
Mortality estimates of striped bass caught in Albemarle Sound and Roanoke River, North Carolina Mortality estimates of striped bass caught in Albemarle Sound and Roanoke River, North Carolina
A statistical analysis of the age composition of striped bass Morone saxatilis harvested in Albemarle Sound and the Roanoke River, North Carolina. indicated that in 1988–1992 the population experienced a relatively high rate of total mortality. Age‐3 and older fish were estimated to have been fully vulnerable to fishing mortality and to have experienced a total instantaneous mortality...
Authors
Robert Dorazio
Use of ultrasonic telemetry to locate the spawning area of Chinese sturgeons Use of ultrasonic telemetry to locate the spawning area of Chinese sturgeons
No abstract available.
Authors
Boyd Kynard, Qiwei Wei, Fu’en Ke
Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin
We model the three-dimensional (3-D) crustal deformation in a deep pull-apart basin as a result of relative plate motion along a transform system and compare the results to the tectonics of the Dead Sea Basin. The brittle upper crust is modeled by a boundary element technique as an elastic block, broken by two en echelon semi-infinite vertical faults. The deformation is caused by a...
Authors
Rafael Katzman, Uri S. ten Brink, Jian Lin
Use of modern infrared thermography for wildlife population surveys Use of modern infrared thermography for wildlife population surveys
A commercially available thermal-infrared scanning system was used to survey populations of several wildlife species. The system's ability to detect species of different sizes in varying habitats relative to conventional survey methods, to differentiate between species in the same habitat, and the influence of environmental factors on operational aspects of employing this technology in...
Authors
D.L. Garner, H.B. Underwood, W.F. Porter
Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation
Similar successions of planktonic foraminifera, calcareous nannofossils, and bolboformids document coeval deposition of the Exmore impact breccia (Virginia Coastal Plain) and an impact ejecta layer at DSDP Site 612 (New Jersey Continental Slope). Both impactites accumulated in the late Eocene during the early part of biochrons P15 (planktonic foraminifera) and NP 19-20 (calcareous...
Authors
C. Wylie Poag, Marie-Pierre Aubry
A proposed North American amphibian monitoring program A proposed North American amphibian monitoring program
No abstract available.
Authors
C. Bishop, D. Bradford, G. Casper, S. Corn, Sam Droege, G. Fellers, P. Geissler, D.M. Green, R. Heyer, M. Lannoo, D. Larson, D. Johnson, R. McDiarmid, J. Sauer, B. Shaffer, H. Whiteman, H. Wilbur
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply
No abstract available.
Authors
William Outerbridge, C. L. Rice, Harvey E. Belkin, T.W. Henry, Michael J. Kunk
Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden) Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden)
Biotite phenocryst compositions in three thick, widespread Ordovician K-bentonites, the Deicke and Millbrig from Big Ridge, Alabama, and the Kinnekulle from Mossen, Västergötland, Sweden, fall into three distinct groups, and so the proposed intercontinental correlation of the Millbrig and the Kinnekulle is suspect. Because the biotites are nearly pristine compositionally, electron...
Authors
John T. Haynes, W.G. Melson, Michael J. Kunk
An 40Ar/39Ar thermochronology of the Ofoten‐Troms region: Implications for terrane amalgamation and extensional collapse of the northern Scandinavian Caledonides An 40Ar/39Ar thermochronology of the Ofoten‐Troms region: Implications for terrane amalgamation and extensional collapse of the northern Scandinavian Caledonides
Fifteen 40Ar/39Ar cooling ages are reported for metamorphic hornblende and muscovite from far traveled terranes constituting the Ofoten nappe stack of northern Norway. Eight cooling ages on hornblende range from 425 to 394 Ma and seven muscovite ages, from the same or nearby outcrops as the hornblendes, range from 400 to 373 Ma. These data are compared with 40Ar/39Ar ages from over a...
Authors
Janet E. Coker, Mark G. Steltenpohl, A. Andersen, Michael J. Kunk
Age of the Cenomanian-Turonian boundary in the Western Interior of the United States Age of the Cenomanian-Turonian boundary in the Western Interior of the United States
High precision 40Ar/39Ar laser-microprobe ages of individual sanidines,40Ar/39Ar plateau age spectra on bulk sanidine concentrates, U-Pb zircon ages, and zircon and apatite fission-track ages from three bentonites bracketing the Cenomanian-Turonian boundary in the Western Interior of the United States suggest an age for the boundary of 93.1 ± 0.3 (2σ. The lowermost bentonite comes from...
Authors
B. J. Kowallis, Eric H. Christiansen, Alan L. Deino, Michael J. Kunk, L. Heaman
Response of northern pintail breeding populations to drought, 1961-1992 Response of northern pintail breeding populations to drought, 1961-1992
According to data from the 1960s, northern pintails (Anas acuta) fly north of the Alberta and Saskatchewan prairies during drought resulting in decreasing pintail annual production. Reanalysis of overflight and reduced-production hypotheses using data from 1961-92 indicated that, although the same basic relationships were present, these relationships changed over time. The number of...
Authors
Jay B. Hestbeck