Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

2007

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 4171 - 4200 of 6758

Full-Text Articles in Physical Sciences and Mathematics

A Tribute To Frederick F. Knowlton, William H. Clay Jan 2007

A Tribute To Frederick F. Knowlton, William H. Clay

Human–Wildlife Interactions

Dr. Fredrick F. Knowlton officially retired on March 31, 2007, with well over 45 years of service to the USDA/Wildlife Services. Fred worked at Wildlife Services’ National Wildlife Research Center Field Station in Logan, Utah, for 35 years alone! His work on coyotes and other species has had an extraordinary impact on the science and management of coyotes. Things that we take for granted today about the life history of coyotes were the result of Fred’s tireless ambition to understand these animals and to improve our ability to manage them. One of our agency’s first Ph.D. hires, Fred produced about …

Go to article

In Memory: A Tribute To Glen Stevenson And Joe Harris, Angie Dustin Jan 2007

In Memory: A Tribute To Glen Stevenson And Joe Harris, Angie Dustin

Human–Wildlife Interactions

Joe and Glen you could depend on
Along the river and the breaks
In rough country and wild weather
They’d be the ones you’d take

Pure poetry in motion
As across the hills they’d fly
Excitement in the hunt
And the freedom of the sky

We’ll pick up the radio
And try to call -‘57’
It’s then that it will hit us
As we gaze into the heavens

Whenever we hear the engine
Of a plane in distant sky
We’ll …

Go to article

Book Review: The Beast In The Garden: A Modern Parable Of Man And Nature, Nicole Mccoy Jan 2007

Book Review: The Beast In The Garden: A Modern Parable Of Man And Nature, Nicole Mccoy

Human–Wildlife Interactions

When I first read The Beast in the Garden shortly aft er the release of the hardback edition in 2004, I was reminded of the exchange quoted above in the movie, “The Matrix.” Neo (Mr. Anderson) survived. Scott Lancaster, a teenage athlete running in the hills outside of his Colorado high school, died. He probably never heard the mountain lion that stalked and killed him, but after reading David Baron’s book, I believe we should have. Had our ears been attuned to the proper frequency, the mountain lion’s approach would have been as loud as the subway train that spelled …

Go to article

Birth Control Is Not For Everyone: A Response, Allen T. Rutberg Jan 2007

Birth Control Is Not For Everyone: A Response, Allen T. Rutberg

Human–Wildlife Interactions

In her Soap Box critique of wildlife contraception (HWC 2007), Elizabeth Bingham makes 2 basic points (if she will forgive my distillation of a complex set of arguments). She argues, first, that wildlife contraception is too expensive and too slow to act to meet the needs of farmers, ranchers, and other business people who suffer losses from wildlife damage. Second, she argues, inflated expectations for the problem-solving capacity of wildlife contraception are driving more attention and research money into wildlife contraception than a more hard-headed evaluation would warrant.

Go to article

Avoiding Confl Icts Between Wildlife Professionals And Local Hunters Over Efforts To Eradicate Exotic Game Species, Hans Sin Jan 2007

Avoiding Confl Icts Between Wildlife Professionals And Local Hunters Over Efforts To Eradicate Exotic Game Species, Hans Sin

Human–Wildlife Interactions

Wildlife damage management, by its nature, is conducive to a variety of conflicts within society, whether it is the method of management or the management itself. Conflicts within society are common, and people with diverse opinions and values may disagree about how wildlife or natural resources should be managed. Opinions can vary among different interest groups (e.g., backpackers, wildlife viewers, and hunters) that have invested time and money in the resource. Eradication efforts of big game to preserve threatened or endangered plants or wildlife have been a source of controversy among various local hunter groups, especially on island ecosystems, such …

Go to article

Foraging Preferences Of Captive Canada Geese Related To Turfgrass Mixtures, Brian E. Washburn, Scott C. Barras, Thomas W. Seamans Jan 2007

Foraging Preferences Of Captive Canada Geese Related To Turfgrass Mixtures, Brian E. Washburn, Scott C. Barras, Thomas W. Seamans

Human–Wildlife Interactions

Overabundant populations of Canada geese (Branta canadensis) cause economic and safety concerns associated with collisions with civil and military aircraft. Habitat management techniques that reduce the use of airfield habitats by geese might reduce these concerns. The objective of this study was to determine if captive Canada geese exhibited a foraging preference between a vegetation mixture consisting mostly of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens) versus an endophyte-infected tall fescue- (Festuca arundinacea) based vegetation mixture.

Go to article

The Role Of Knowledge In Developing People Skills, Ben C. West Jan 2007

The Role Of Knowledge In Developing People Skills, Ben C. West

Human–Wildlife Interactions

As I noted in the last issue of Human–Wildlife Conflicts, wildlife professionals have historically been lambasted for poorly-developed people skills (West 2007). Moreover, I suggested that full development of any skill relies on knowledge, practice, and feedback. To become a top-notch golfer, for example, one must intellectually understand many things, including rules of the game, layout of golf courses, biomechanics of swinging a golf club, situational advantages and disadvantages or different sized clubs, and many other things. However, to have that knowledge is not enough to be a great golfer; one must also apply that knowledge to the game …

Go to article

The Changing Face Of Wildlife Damage Management, William H. Clay Jan 2007

The Changing Face Of Wildlife Damage Management, William H. Clay

Human–Wildlife Interactions

On behalf of the Wildlife Services program, I’m pleased to provide some thoughts for this initial issue of Human–Wildlife Conflicts regarding the changing face of wildlife damage management. Having been in this profession for more than 25 years, I have witnessed firsthand the growth and evolution of wildlife damage management programs across the country. The entire field of wildlife damage management has been in a period of change during the past 15 to 20 years. Wildlife damage managers making decisions in today’s environment must now consider a wide range of legitimate public interests that often conflict with one another. These …

Go to article

Perceptions Of Wildlife Damage And Species Conservation: Lessons Learned From The Utah Prairie Dog, R. Dwayne Elmore, Terry A. Messmer, Mark W. Brunson Jan 2007

Perceptions Of Wildlife Damage And Species Conservation: Lessons Learned From The Utah Prairie Dog, R. Dwayne Elmore, Terry A. Messmer, Mark W. Brunson

Human–Wildlife Interactions

The Utah prairie dog (Cynomys parvidens), a federally listed threatened species, causes damage to agricultural operations, yet little incentive exists for private landowners to conserve them. Therefore, we surveyed Utah residents to identify stakeholder attitudes regarding prairie dog management. We assessed how perceptions of wildlife damage affect respondent attitudes regarding conservation among agricultural producers, rural residents, and urban residents. Higher levels of perceived wildlife damage were reported for agriculture respondents …

Go to article

Comparison Of Sampling Strategies To Estimate Abundance Of Double-Crested Cormorants In Western Mississippi, Aaron T. Pearse, Brian S. Dorr, Stephen J. Dinsmore, Richard M. Kaminski Jan 2007

Comparison Of Sampling Strategies To Estimate Abundance Of Double-Crested Cormorants In Western Mississippi, Aaron T. Pearse, Brian S. Dorr, Stephen J. Dinsmore, Richard M. Kaminski

Human–Wildlife Interactions

We compared 2 sampling strategies designed to estimate abundance of double-crested cormorants (Phalacrocorax auritus, hereafter cormorants) on aquaculture ponds in western Mississippi. Cormorants are a major predator of cultured channel catfish (Ictalurus punctatus) in this region; thus, estimating cormorant abundance is needed to better determine their economic impact. We independently designed a species-specific survey (i.e., cluster sampling) and a general survey (i.e., transect sampling) based on robust probability sampling theory to estimate abundance of this target population. During winters 2002–2003 and 2003–2004, we conducted 8 pairs of surveys and compared estimates of cormorant abundance and associated …

Go to article

Expanding Bear Populations Bring New Challenges To State Wildlife Agencies, Robert Southwick Jan 2007

Expanding Bear Populations Bring New Challenges To State Wildlife Agencies, Robert Southwick

Human–Wildlife Interactions

In the 1800s, bears were almost eliminated from the United States because they were seen as a threat to humans and livestock and were labeled pests. Now, bear populations are growing and becoming more widely dispersed. Their numbers are increasing and continually extending into new territories, including suburban areas. Suburban developments also are expanding into already established bear territory. This helps to explain that while state wildlife agencies estimate bear populations have increased 12% nationally during the past 5 years, bear complaints have increased 19%, personnel hours to resolve complaints have increased 22%, and state agency expenditures to control bear …

Go to article

Developing People Skills In The Human–Wildlife Conflict Community, Ben C. West Jan 2007

Developing People Skills In The Human–Wildlife Conflict Community, Ben C. West

Human–Wildlife Interactions

As I travel across the country talking with wildlife professionals about leadership and communication, I often ask groups this question: “How many of you decided to become a wildlife biologist because you just love working with people?” Believe it or not, I’ve never witnessed the raising of a single hand.

Go to article

Structure And Magnetic Properties Of Mn-Doped Zno Thin Films, Jun Zhang, Xingzhong Li, J. Shi, Yongfeng Lu, David J. Sellmyer Jan 2007

Structure And Magnetic Properties Of Mn-Doped Zno Thin Films, Jun Zhang, Xingzhong Li, J. Shi, Yongfeng Lu, David J. Sellmyer

David Sellmyer Publications

We report the structure and magnetic properties of Zn1-xMnxO thin films grown on Si(001) substrates by pulsed laser deposition. Structure and phase evolution with Mn doping has been studied using x-ray diffraction, electron diffraction, and high-resolution electron microscopy. The undoped and 1% Mn-doped ZnO films are completely (001) oriented, and further Mn doping deteriorates the (001) orientation. For Mn concentrations below 3%, only the hexagonal ZnO phase exists in the films without secondary phases. As the Mn concentration reaches 5%, secondary phase Mn2O3 was found aggregating at grain boundaries. All the Mn-doped films …

Go to article

Tem Study Of Fept And Fept:C Composite Double-Layered Thin Films, Xingzhong Li, T. George, Lingfang Jin, M. L. Yan, X. F. Xu, David J. Sellmyer Jan 2007

Tem Study Of Fept And Fept:C Composite Double-Layered Thin Films, Xingzhong Li, T. George, Lingfang Jin, M. L. Yan, X. F. Xu, David J. Sellmyer

David Sellmyer Publications

FePt films and FePt-based nano-composite films with the high-anisotropy L10 ordered phase have been extensively studied, since they have significant potential for extremely high-density perpendicular magnetic recording media and nano-composite permanent magnets [1]. Recently, new functional films were synthesized with a FePt:C composite layer on top of continuous FePt layer, in order to study the effect of the FePt layer on the ordering, orientation and magnetic properties of the composite layer. Transmission electron microscopy (TEM), together with X-ray diffraction, has been used to check the growth of the double-layered films and to study the microstructure, including the grain size, …

Go to article

Correlation Of The Highest-Energy Cosmic Rays With Nearby Extragalactic Objects, J. Aberham, Gregory Snow, The Pierre Auger Collaboration Jan 2007

Correlation Of The Highest-Energy Cosmic Rays With Nearby Extragalactic Objects, J. Aberham, Gregory Snow, The Pierre Auger Collaboration

Gregory Snow Publications

Cosmic rays are particles and nuclei that bombard the Earth from space in all directions (1). A few have astounding energies—beyond 100 EeV (1 EeV = 1 exa-electron volt = 1018 eV)—orders of magnitude beyond even the future capabilities of any earthly particle accelerator. Such energies are so extreme that they could arise in only the most violent places in the universe. One possible location is within active galactic nuclei (AGN), galaxies hosting central black holes that feed on gas and stars and may eject vast plasma jets into intergalactic space.

Go to article

Us Cms Tier-2 Computing, Kenneth A. Bloom Jan 2007

Us Cms Tier-2 Computing, Kenneth A. Bloom

Kenneth Bloom Publications

The CMS computing model relies heavily on the use of “Tier-2” computing centers. At LHC startup, the typical Tier-2 center in the United States will have 1 MSpecInt2K of CPU resources, 200 TB of disk for data storage, and a WAN connection of 10 Gbit/s. These centers will be the primary sites for the production of large-scale simulation samples and for the hosting of experiment data for user analysis – an interesting mix of experiment-controlled and user-controlled tasks. As a result, there are a wide range of services that must be deployed and commissioned at these centers, which are responsible …

Go to article

Ferroelectric Properties Of Langmuir-Blodgett Copolymer Films At The Nanoscale, A. Tolstousov, R. V. Gaynutdinov, R. Tadros-Morgane, Herbert Kliem, Stephen Ducharme, Vladimir M. Fridkin Jan 2007

Ferroelectric Properties Of Langmuir-Blodgett Copolymer Films At The Nanoscale, A. Tolstousov, R. V. Gaynutdinov, R. Tadros-Morgane, Herbert Kliem, Stephen Ducharme, Vladimir M. Fridkin

Stephen Ducharme Publications

Langmuir-Blodgett (LB) films are well known structures prepared as a result of successive transfer of monolayers (ML) from the gas-liquid interface onto solid substrates. One impressive possibility of LB method is the opportunity to vary the thickness of the film to an accuracy of one transfer, which could coincide with one ML. The ferroelectric properties of a copolymer of vinylidene fluoride and trifluorethylene P[VDF-TrFE] prepared by LB deposition are investigated in the region of a few monolayers.

Go to article

Mcmurdo Ice Shelf Seismic Reflection Data And Correlation To The And-1b Drill Hole, D. Hansaraj, S. A. Henrys, T. R. Naish, Andrill Mis-Science Team Jan 2007

Mcmurdo Ice Shelf Seismic Reflection Data And Correlation To The And-1b Drill Hole, D. Hansaraj, S. A. Henrys, T. R. Naish, Andrill Mis-Science Team

ANDRILL Research and Publications

Surface seismic reflection data from the ANDRILL-MIS Project site surveys are integrated with a regionally extensive McMurdo Sound seismic stratigraphic framework. In addition, these seismic data are correlated to the AND-1B drill hole using vertical seismic profiles acquired during drilling operations (December/January 2006/7). Six regionally interpreted reflectors are identified in core as distinct lithostratigraphic boundaries.

Go to article

Clast Provenance And Variability In Mis (And-1b) Core And Their Implications For The Paleoclimatic Evolution Recorded In The Windless Bight - Southern Mcmurdo Sound Area (Antarctica), F. Talarico, Andrill-Mis Science Team Jan 2007

Clast Provenance And Variability In Mis (And-1b) Core And Their Implications For The Paleoclimatic Evolution Recorded In The Windless Bight - Southern Mcmurdo Sound Area (Antarctica), F. Talarico, Andrill-Mis Science Team

ANDRILL Research and Publications

Granule- to cobble-grade clasts in the uppermost 575 m of the MIS drill-core (AND-1B) highlight significant downcore modal and compositional variations, which provide direct information about the potential source regions and evidence of an evolving provenance, most likely as results of variable ice conditions and ice-flow directions during the deposition of recovered diamictites. In addition to a significant contribution from the McMurdo Volcanic Group, the dataset indicates a compositionally varied clast assemblage including several basement rock types which are comparable to the main geological units exposed in the area SW of the drillsite, between the Skelton and Byrd Glaciers. Based …

Go to article

The Volcanic Record In The Andrill Mcmurdo Ice Shelf And-1b Drill Core, M. Pompilio, P. Kyle, T. Wilch, N. Dunbar, Andrill-Mis Project Science Team Jan 2007

The Volcanic Record In The Andrill Mcmurdo Ice Shelf And-1b Drill Core, M. Pompilio, P. Kyle, T. Wilch, N. Dunbar, Andrill-Mis Project Science Team

ANDRILL Research and Publications

The 1285 m thick MIS core offers an invaluable opportunity to obtain a detailed record of volcanism in McMurdo Sound. Volcanic stratigraphy and preliminary petrologic data on volcanic rocks in the AND-1B core are reported here. Remarkable volcanic deposits include: a) a phonolitic pumice layer found at ≈85 mbsf which is not correlated to any known vent onshore; b) a black well sorted volcanic sands succession (132.83 to 146.79 mbsf) interpreted as being derived mainly from subaerial Hawaiian/Strombolian eruptions; c) a thick volcanic succession in the middle part of the core with an interbedded submarine lava flow. The flow may …

Go to article

Operations Overview For The Andrill Mcmurdo Ice Shelf Project, Antarctica, T. Falconer, A. Pyne, M. Olney, M. Curren, Andrill-Mis Science Team Jan 2007

Operations Overview For The Andrill Mcmurdo Ice Shelf Project, Antarctica, T. Falconer, A. Pyne, M. Olney, M. Curren, Andrill-Mis Science Team

ANDRILL Research and Publications

During the austral summer of 2006, a record-setting 1 284.87 metre (m)-long rock and sediment core (ANDRILL [AND]-1B) was recovered from beneath the McMurdo Ice Shelf (MIS) in 917m of water. A custom built drilling system comprising a UDR-1200 rig, jack-up platform, hot water drill, sea riser, and diamond-bit wireline coring string was set up on the McMurdo Ice Shelf approximately 9 kilometres (km) from Scott Base (NZ). The drilling sytem employed technology developed to handle challenging environmental conditions including an 85 m-thick ice shelf ‘platform’ that moved both laterally and vertically, strong tidal currents, and high winds. Drill site …

Go to article

Future Antarctic Geological Drilling: Discussion Paper On Andrill And Beyond, P. J. Barrett, P.-N. Webb, D. Futterer, C. Ghezzo, M. R. A. Thomson, A. R. Pyne, F. R. Rack Jan 2007

Future Antarctic Geological Drilling: Discussion Paper On Andrill And Beyond, P. J. Barrett, P.-N. Webb, D. Futterer, C. Ghezzo, M. R. A. Thomson, A. R. Pyne, F. R. Rack

ANDRILL Research and Publications

Geological drilling technology developed over the last quarter century has provided access to critical knowledge on the climatic and tectonic history of the Victoria Land margin of Antarctica, giving us a new understanding of the history and behaviour of the Antarctic ice sheet in this region over the last 34 million years. The challenge now is to develop a framework within the Antarctic science and logistics communities and other relevant groups for further projects to extend this technology to other areas both around the Antarctic margin and into the interior. This paper reviews some of the issues and offers a …

Go to article

Late Pleistocene To Holocene Strata From Soft-Sediment Coring At The And-1b Site, Andrill Mcmurdo Ice Shelf Project, Antarctica, Gavin B. Dunbar, F. Niessen, S. Vogel, S. Tulaczyk, K. Mandernack, L. Krissek, L. Carter, E. A. Cowan, T. Wilch, C. Peng, C. P. Strong, R. Scherer, C. Sjunneskog, D. Winter, R. Mckay, F. Talarico, M. Pompilio, Andrill-Mis Science Team Jan 2007

Late Pleistocene To Holocene Strata From Soft-Sediment Coring At The And-1b Site, Andrill Mcmurdo Ice Shelf Project, Antarctica, Gavin B. Dunbar, F. Niessen, S. Vogel, S. Tulaczyk, K. Mandernack, L. Krissek, L. Carter, E. A. Cowan, T. Wilch, C. Peng, C. P. Strong, R. Scherer, C. Sjunneskog, D. Winter, R. Mckay, F. Talarico, M. Pompilio, Andrill-Mis Science Team

ANDRILL Research and Publications

Prior to rotary coring, a range of soft-sediment coring tools were deployed to recover the sediment-water interface and the upper few metres of strata, whose integrity was threatened by embedment of the sea riser for drilling of the ANDRILL (AND)-1A/1B holes. These coring options included (1) a sediment gravity corer deployed through the ice-shelf hole, and (2) a push corer deployed through the sea riser suspended a few metres above the seabed. Within the AND-1A hole (during an attempt at sea-riser embedment) an extended-nose corer was advanced in front of the sea riser with limited success. The hydraulic piston corer …

Go to article

Determination Of And Preliminary Results From The High-Resolution Physical Properties Record Of The And-1b Sediment Core From Beneath Ross Ice Shelf, Antarctica, D. Magens, F. Niessen Jan 2007

Determination Of And Preliminary Results From The High-Resolution Physical Properties Record Of The And-1b Sediment Core From Beneath Ross Ice Shelf, Antarctica, D. Magens, F. Niessen

ANDRILL Research and Publications

A more than 1200 m long sediment core was drilled beneath McMurdo Ice Shelf near Ross Island (Antarctica) in austral summer 2006/07 (ANDRILL-MIS Project). High-resolution whole-core physical properties were determined as one set of parameters to describe changes in the depositional system over the sedimentation period of about 12 myrs incorporated in the core. Four parameters were measured using a multi-sensor core logger: acoustic velocity, wet-bulk density, non-contact electrical resistivity and magnetic susceptibility. Data quality was routinely controlled by measurement of standards. Deviations from the reference values are minimal with regard to the whole spectrum of sediment data points and …

Go to article

Sedimentology And Stratigraphy Of The Andrill Mcmurdo Ice Shelf (And-1b) Core, L. A. Krissek, G. Browne, L. Carter, E. A. Cowan, G. Dunbar, R. Mckay, T. Naish, R. D. Powell, J. Reed, T. Wilch, Andrill-Mis Science Team Jan 2007

Sedimentology And Stratigraphy Of The Andrill Mcmurdo Ice Shelf (And-1b) Core, L. A. Krissek, G. Browne, L. Carter, E. A. Cowan, G. Dunbar, R. Mckay, T. Naish, R. D. Powell, J. Reed, T. Wilch, Andrill-Mis Science Team

ANDRILL Research and Publications

During the 2006-2007 austral summer, the ANDRILL McMurdo Ice Shelf Project recovered a core 1285 m long (AND-1B) from Windless Bight in McMurdo Sound. This core contains a range of lithologies, including both siliciclastic and volcanic diamictites, sandstones and mudstones; diatomites; and volcanic ash/tuff and one phonolitic lava flow. This sequence has been subdivided into eight lithostratigraphic units and 25 subunits, based on lithological abundances. Eleven lithofacies have been identified, ranging from open marine diatomites and mudstones to turbidites to ice-proximal massive and stratified diamictites. More than 50 glacimarine sequences have been recognized, bounded by glacial surfaces of erosion. Three …

Go to article

Downhole Measurements In The And-1b Borehole, Andrill Mcmurdo Ice Shelf Project, Antarctica, Roger H. Morin, T. Williams, S. Henrys, T. Crosby, D. Hansaraj, Andrill- Mis Science Team Jan 2007

Downhole Measurements In The And-1b Borehole, Andrill Mcmurdo Ice Shelf Project, Antarctica, Roger H. Morin, T. Williams, S. Henrys, T. Crosby, D. Hansaraj, Andrill- Mis Science Team

ANDRILL Research and Publications

A comprehensive set of downhole measurements was collected in the AND-1B drillhole as part of the on-ice scientific programme defined for the McMurdo Ice Shelf (MIS) Project. Geophysical logs were recorded over two operation phases and consisted of calliper, temperature, fluid conductivity, induction resistivity, magnetic susceptibility, natural gamma activity, acoustic televiewer, borehole deviation, and dipmeter. In addition, two standard vertical seismic profiles (VSP) and one walk-away VSP were obtained. Radioactive logs (porosity and density) were not run because of unstable borehole conditions. Although the total depth of the hole is 1285 metres below seafloor (mbsf), the depth range for in …

Go to article

Geochemical Variations Detected With Continuous Xrf Measurements On Andrill And-1b Core - Preliminary Results, D. Helling, G. Kuhn, Andrill-Mis Science Team Jan 2007

Geochemical Variations Detected With Continuous Xrf Measurements On Andrill And-1b Core - Preliminary Results, D. Helling, G. Kuhn, Andrill-Mis Science Team

ANDRILL Research and Publications

Antarctica and especially its ice sheets play a major role in both the global ocean current system and climate. The ANDRILL (Antarctic Geological Drilling) MIS deep drilling project (McMurdo Sound, NE Ross Ice Shelf, drilled core AND-1B during austral summer 2006/2007) is located in a flexural moat basin filled with glaciomarine, terrigenous, volcanic, and biogenic sediments (Horgan et al., 2005). This basin contains a well-preserved outstanding record of paleoclimate history. During the drilling phase, some major and minor chemical elements were measured directly using a non-destructive X-Ray Fluorescence Core Scanner (XRF-CS) method. For the first time, sediments beneath an ice …

Go to article

Examining Antarctica: A Geological Record Of The Last 14 Million Years Of Antarctic Climate And Tectonic History From Andrill Mcmurdo Ice Shelf Project, T. R. Naish, R. D. Powell, R. H. Levy, Andrill-Mis Science Team Jan 2007

Examining Antarctica: A Geological Record Of The Last 14 Million Years Of Antarctic Climate And Tectonic History From Andrill Mcmurdo Ice Shelf Project, T. R. Naish, R. D. Powell, R. H. Levy, Andrill-Mis Science Team

ANDRILL Research and Publications

During the Southern Hemisphere's last summer, between October 29 and December 26, about 80 researchers, drillers, educators and support staff from four nations met in Antarctica to drill deeper than ever before into the Antarctic continental margin. With a recovery of 98 percent, the new core represents the longest and most complete geological record from the seafloor just off Antarctica. Researchers working on the project hope the core will help them understand Antarctica's storied past.

Go to article

Sedimentology And Stratigraphy Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, L. Krissek, G. Browne, L. Carter, E. A. Cowan, G. Dunbar, R. Mckay, T. Naish, R. D. Powell, J. Reed, T. Wilch, Andrill-Mis Science Team Jan 2007

Sedimentology And Stratigraphy Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, L. Krissek, G. Browne, L. Carter, E. A. Cowan, G. Dunbar, R. Mckay, T. Naish, R. D. Powell, J. Reed, T. Wilch, Andrill-Mis Science Team

ANDRILL Research and Publications

During the 2006–2007 austral season, the ANDRILL McMurdo Ice Shelf Project recovered a core 1285 m-long (AND-1B) from Windless Bight in the McMurdo Sound region. This core contains a range of lithologies, including both siliciclastic and volcanic diamictites, sandstones and mudstones; diatomites; and volcanic ash/tuff and one phonolitic lava flow. The succession has been subdivided into eight lithostratigraphic units and 25 subunits, based on lithological abundances. Eleven lithofacies have been recognized, ranging from open marine diatomites and mudstones to turbidites to ice-proximal massive and stratified diamictites. More than 60 glacimarine sequences have been recognised, bounded by glacial surfaces of erosion. …

Go to article

Comprehensive Downhole And Core Physical-Property Measurements At The And-1b Drillsite, Andrill Mcmurdo Ice Shelf Project, F. Niessen, Roger H. Morin, Trevor Williams, Stuart A. Henrys, T. Crosby, Dhiresh Hansaraj, D. Magens, A. C. Gebhardt, Andrill-Mis Science Team Jan 2007

Comprehensive Downhole And Core Physical-Property Measurements At The And-1b Drillsite, Andrill Mcmurdo Ice Shelf Project, F. Niessen, Roger H. Morin, Trevor Williams, Stuart A. Henrys, T. Crosby, Dhiresh Hansaraj, D. Magens, A. C. Gebhardt, Andrill-Mis Science Team

ANDRILL Research and Publications

As part of the ANDRILL McMurdo Ice Shelf (MIS) Project two comprehensive sets of geophysical data were collected on ice at the AND-1B drillsite. Whole-core physical properties were determined with high vertical resolution to a depth of 1285 mbsf. A multi-sensor-core-logger was used to determine bulk density, sonic velocity, magnetic susceptibility and electrical resistivity. After drilling, a set of downhole measurements was collected, which consisted of caliper, temperature, fluid conductivity, induction resistivity, magnetic susceptibility, natural gamma activity, acoustic televiewer, borehole deviation, and dipmeter. In addition, three vertical seismic profiles (VSP) were obtained. Physical properties were used for initial core characterization …

Go to article

First Prev Next Last