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2007

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Articles 121 - 150 of 165

Full-Text Articles in Environmental Indicators and Impact Assessment

Application Of A Karst Environmental Disturbance Index In Hillsborough County., Philip Van Beynen, Nilda Feliciano, Leslie North, Kaya Van Beynen Jan 2007

Application Of A Karst Environmental Disturbance Index In Hillsborough County., Philip Van Beynen, Nilda Feliciano, Leslie North, Kaya Van Beynen

USF St. Petersburg Campus Faculty Publications

Hillsborough County, Florida, is a karst region that is heavily urbanized, yet no study has been undertaken measuring the degree of human disturbance. Van Beynen and Townsend (2005) created a hierarchical and standardized disturbance index specifically designed for karst environments. To address the problem of determining human disturbance in the county, the above index was successfully applied and it was found that Hillsborough was highly disturbed (disturbance score of 0.69 of 1.0) because of its predominant urban and rural land use. Furthermore, the application of the index allowed for its refinement and the highlighting of environmental aspects in need of …

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Impact Of More Intensive Grazing On Nitrogen And Phosphorus In Shallow Aquifers Of The Southern Perth Basin, D L. Bennett, Patrick Donnelly, Peter J. Tille Jan 2007

Impact Of More Intensive Grazing On Nitrogen And Phosphorus In Shallow Aquifers Of The Southern Perth Basin, D L. Bennett, Patrick Donnelly, Peter J. Tille

Resource management technical reports

This study reports on the nutrient content, pH and salinity of groundwater samples collected from the watertable and within the Superficial and the upper Leederville Aquifers from the Southern Perth Basin, south of Pinjarra, Western Australia. Sampling was undertaken to determine the impact of intensification of broadscale grazing on groundwater nutrients in the area.

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Aphis’ Plant Inspection Stations: Protecting American Agriculture From Foreign Pests And Diseases, United States Department Fo Agriculture, Animal And Plant Health Inspection Service Jan 2007

Aphis’ Plant Inspection Stations: Protecting American Agriculture From Foreign Pests And Diseases, United States Department Fo Agriculture, Animal And Plant Health Inspection Service

All U.S. Government Documents (Utah Regional Depository)

In today’s global marketplace, the volume of international trade brings increased potential for the introduction of foreign pests, diseases, and noxious weeds that could threaten the safety of American agriculture. The results of such introductions can have a devastating effect on the U.S. food supply, damage our natural resources, and cost hundreds of millions of dollars in eradication and control measures that ultimately result in higher priced agricultural products for the consumer.

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Utah Annual Air Monitoring Network Plan 2007 (Final Draft), Division Of Air Quality, Utah State Department Of Environmental Quality Jan 2007

Utah Annual Air Monitoring Network Plan 2007 (Final Draft), Division Of Air Quality, Utah State Department Of Environmental Quality

All U.S. Government Documents (Utah Regional Depository)

The monitoring network has been described in the network reviews from 1982 through 2007. A complete description of each station is located in the station file at the Air Monitoring Center and is available upon request. This network review will focus on the adequacy of the existing network and the changes that are needed. The existing or proposed monitoring stations are reviewed to see if the objectives are being met. The most recent emissions inventories for each pollutant are reviewed along with ambient data gathered in the area and, when available, current computer air pollution dispersion modeling is also reviewed. …

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Utah Off-Highway Vehicle Laws And Rules, Utah Dnr State Parks Jan 2007

Utah Off-Highway Vehicle Laws And Rules, Utah Dnr State Parks

All U.S. Government Documents (Utah Regional Depository)

Utah Off-Highway Vehicle Laws and Rules taken from The Utah Off-Highway Vehicle Act and The Utah Board of Parks and Recreation Rules Title 41, Chapter 22, Utah Code Annotated 1953. NOTICE: Though the following laws and rules were screened for accuracy prior to publication, errors may still exist. In addition, changes in law and rule may be made at any time. Readers are encouraged to contact the Utah Division of Parks and Recreation for clarification of any law or rule contained herein.

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Utah Off-Highway Vehicle Laws And Rules, Utah Dnr State Parks Jan 2007

Utah Off-Highway Vehicle Laws And Rules, Utah Dnr State Parks

All U.S. Government Documents (Utah Regional Depository)

Utah Off-Highway Vehicle Laws and Rules taken from The Utah Off-Highway Vehicle Act and The Utah Board of Parks and Recreation Rules Title 41, Chapter 22, Utah Code Annotated 1953. NOTICE: Though the following laws and rules were screened for accuracy prior to publication, errors may still exist. In addition, changes in law and rule may be made at any time. Readers are encouraged to contact the Utah Division of Parks and Recreation for clarification of any law or rule contained herein.

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Boyup Brook - Upper Warren Area : Catchment Appraisal 2007/ Prepared By The South West Arm Region Appraisal Team., Henry Brockman Jan 2007

Boyup Brook - Upper Warren Area : Catchment Appraisal 2007/ Prepared By The South West Arm Region Appraisal Team., Henry Brockman

Resource management technical reports

The aim of this Resource Management Technical Report is to assess the current extent of salinity and other natural resource degradation issues in the Boyup Brook - Upper Warren area and provide landholders with the best current management options to address natural resource management issues and enhance sustainable agricultural production.

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Potential Capture Of Surface Run-Off For Reliable Water Supplies In The 500-825 Mm Rainfall Zone Of South Western Australia, D L. Bennett, Peter J. Tille, Ned Stephenson, Tilwin Westrup Jan 2007

Potential Capture Of Surface Run-Off For Reliable Water Supplies In The 500-825 Mm Rainfall Zone Of South Western Australia, D L. Bennett, Peter J. Tille, Ned Stephenson, Tilwin Westrup

Resource management technical reports

No abstract provided.

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West Midlands Region Catchment Appraisal 2007, Angela Stuart-Street, Northern Agricultural Region Catchment Appraisal Team Jan 2007

West Midlands Region Catchment Appraisal 2007, Angela Stuart-Street, Northern Agricultural Region Catchment Appraisal Team

Resource management technical reports

Annual run-off likely to occur was calculated for farm-scale catchments within the 500-825 millimetre rainfall zone of the South West Catchment Council [Western Australia] area. When compared with historical flow measurements, this method was found to be accurate (or conservative) in 85% of all measured years, indicating its usefulness for predicting reliable annual flows.

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Science And The Storms: The Usgs Response To The Hurricanes Of 2005 - Chapter Six: Ecological Impacts, William Conner, Stephen Faulkner, Wylie Barrow, Brady Couvillion, Lori Randall, Michael Baldwin Jan 2007

Science And The Storms: The Usgs Response To The Hurricanes Of 2005 - Chapter Six: Ecological Impacts, William Conner, Stephen Faulkner, Wylie Barrow, Brady Couvillion, Lori Randall, Michael Baldwin

Publications

Ecological impacts from the hurricanes of 2005 affected both vegetation and the animals that depend on coastal habits on land and in water. Discussed in this section are migratory birds, coastal marsh vegetation, chenier forests, coastal floodplain forests, mangrove forests, estuaries, and the endangered manatee.

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Enhancing The Detection And Classification Of Coral Reef And Associated Benthic Habitats: A Hyperspectral Remote Sensing Approach, Deepak R. Mishra, Sunil Narumalani, Donald Rundquist, Merlin P. Lawson, R. Perk Jan 2007

Enhancing The Detection And Classification Of Coral Reef And Associated Benthic Habitats: A Hyperspectral Remote Sensing Approach, Deepak R. Mishra, Sunil Narumalani, Donald Rundquist, Merlin P. Lawson, R. Perk

Center for Advanced Land Management Information Technologies: Publications

Coral reefs and associated benthic habitats are heterogeneous in nature. A remote sensor designed to discriminate these environments requires a high number of narrow, properly placed bands which are not currently available in existing satellite sensors. Optical hyperspectral sensors mounted on aerial platforms seem to be appropriate for overcoming the lack of both high spectral and spatial resolution of satellite sensors. This research presents results of an innovative coral reef application by such a sensor. Using hyperspectral Airborne Imaging Spectroradiometer for Applications (AISA) Eagle data, the approach presented solves the confounding influence of water column attenuation on substrate reflectance on …

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Palaeomagnetism Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, G. S. Wilson, F. Florindo, L. Sagnotti, C. Ohneiser, Andrill-Mis Sceince Team Jan 2007

Palaeomagnetism Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, G. S. Wilson, F. Florindo, L. Sagnotti, C. Ohneiser, Andrill-Mis Sceince Team

ANDRILL Research and Publications

Preliminary palaeomagnetic data are presented for the AND-1B drill core. A total of 1309 samples were collected from the drill core immediately following recovery and splitting. Natural remanent magnetisation (NRM) and bulk magnetic susceptibility data were determined for all samples using a Molspin spinner magnetometer and Bartington Instruments susceptibility bridge, respectively, immediately after collection. Polarity was determined for the upper 700 m of the drill core from 615 stepwise alternating field (AF) and thermally demagnetized samples with an average sample spacing of ~80 cm between 32 and 240 mbsf and ~2 m between 240 and 700 mbsf. Stepwise demagnetised samples …

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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 …

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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 …

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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 …

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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 …

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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 …

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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 …

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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 …

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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. …

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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 …

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A Record Of Antarctic Climate And Ice Sheet History Recovered, T. R. Naish, R. D. Powell, R. H. Levy, F. Florindo, D. M. Harwood, G. Kuhn, F. Niessen, F. Talarico, G. S. Wilson Jan 2007

A Record Of Antarctic Climate And Ice Sheet History Recovered, T. R. Naish, R. D. Powell, R. H. Levy, F. Florindo, D. M. Harwood, G. Kuhn, F. Niessen, F. Talarico, G. S. Wilson

ANDRILL Research and Publications

Antarctica’s late Cenozoic (the past ~15 million years) climate history is poorly known from direct evidence, owing to its remoteness, an extensive sea ice apron, and an ice sheet cover over the region for the past 34 million years. Consequently, knowledge about the role of Antarctica’s ice sheets in global sea level and climate has relied heavily upon interpretations of oxygen isotope records from deep-sea cores. Whereas these isotopic records have revolutionized our understanding of climate-ice-ocean interactions, questions still remain about the specific role of Antarctic ice sheets in global climate. Such questions can be addressed from geological records at …

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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.

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Background To The Andrill Mcmurdo Ice Shelf Project (Antarctica) And Initial Science Volume, T. R. Naish, R. D. Powell, R. H. Levy, Andrill-Mis Science Team Jan 2007

Background To The Andrill Mcmurdo Ice Shelf Project (Antarctica) And Initial Science Volume, T. R. Naish, R. D. Powell, R. H. Levy, Andrill-Mis Science Team

ANDRILL Research and Publications

The aim of the McMurdo Ice Shelf (MIS) Project was to obtain a continuous sediment core through approximately ~1 200 metres (m) of Neogene (~0-10 Ma) glacimarine, terrigenous, volcanic, and biogenic sediment that has accumulated in the Windless Bight region of the McMurdo Ice Shelf (Fig. 1). The present-day MIS forms the northwest part of Ross Ice Shelf where it has been pinned by Ross Island for the last ~10 k.y., and is nourished by ice sourced from East Antarctic Ice Sheet (EAIS) outlet glaciers in the southern Transantarctic Mountains (TAM). The drill site was situated above a flexural moat …

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Synthesis Of The Initial Scientifi C Results Of The Mis Project (And-1b Core), Victoria Land Basin, Antarctica, T. R. Naish, R. D. Powell, R. H. Levy, S. Henrys, L. Krissek, F. Niessen, M. Pompilio, R. Scherer, G. S. Wilson Jan 2007

Synthesis Of The Initial Scientifi C Results Of The Mis Project (And-1b Core), Victoria Land Basin, Antarctica, T. R. Naish, R. D. Powell, R. H. Levy, S. Henrys, L. Krissek, F. Niessen, M. Pompilio, R. Scherer, G. S. Wilson

ANDRILL Research and Publications

The ANDRILL Program successfully recovered a 1285 m-long succession of cyclic glacimarine sediment with interbedded volcanic deposits in its first season of drilling from the McMurdo Ice Shelf (MIS). The MIS AND-1B drill core represents the longest and most complete (98% recovery) geological record from the Antarctic continental margin to date, and will provide a key reference record of climate and ice-sheet variability through the Late Cenozoic. Here we present a synopsis of this Initial Science Report with emphasis on the potential of the record for improving our knowledge of Antarctica’s influence on global climate.

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Physical Properties Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, F. Niessen, D. Magens, A. C. Gebhardt Jan 2007

Physical Properties Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, F. Niessen, D. Magens, A. C. Gebhardt

ANDRILL Research and Publications

Whole-core physical properties of the AND-1B sediment core were determined on site for initial core characterisation and correlation with seismic modelling to predict target-reflector depth. This was accomplished by the application of a GEOTEK MSCL (multisensor core logger) from which detected parameters were converted to wet bulk density (WBD), P-wave velocity (Vp), and magnetic susceptibility (MS). Due to difficulties in terms of sensor drift, non-contact resistivity (NCR) data were not processed on site. Standards were logged together with the cores throughout the entire depth range to monitor data quality and demonstrate that no systematic offsets occurred between different core diameters …

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Petrology And Geochemistry Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, M. Pompilio, N. Dunbar, A. C. Gebhardt, D. Helling, G. Kuhn, P. Kyle, R. Mckay, F. Talarico, S. Tulaczyk, S. Vogel, T. Wilch, Andrill-Mis Science Team Jan 2007

Petrology And Geochemistry Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, M. Pompilio, N. Dunbar, A. C. Gebhardt, D. Helling, G. Kuhn, P. Kyle, R. Mckay, F. Talarico, S. Tulaczyk, S. Vogel, T. Wilch, Andrill-Mis Science Team

ANDRILL Research and Publications

This section reports preliminary data and results on petrology and geochemistry of AND-1B core.

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Antarctic Ice Sheet Dynamics Through The Neogene From Evidence In The Andrill–Mcmurdo Ice Shelf Project Drillcore (And-1b), R. D. Powell, T. R. Naish, L. A. Krissek, G. H. Browne, L. Carter, E. A. Cowan, Gavin B. Dunbar, R. M. Mckay, T. Wilch, Andrill-Mis Science Team Jan 2007

Antarctic Ice Sheet Dynamics Through The Neogene From Evidence In The Andrill–Mcmurdo Ice Shelf Project Drillcore (And-1b), R. D. Powell, T. R. Naish, L. A. Krissek, G. H. Browne, L. Carter, E. A. Cowan, Gavin B. Dunbar, R. M. Mckay, T. Wilch, Andrill-Mis Science Team

ANDRILL Research and Publications

ANDRILL completed its first season in 2006-07 drilling AND-1B through the McMurdo Ice Shelf (MIS) to a depth of 1,285m below the sea floor, a record for Antarctic margin drilling, with 99% recovery. The alternating glacial-interglacial sediment packages interbedded with volcanics provide a uniquely detailed record of Antarctic glacial and climatic change through the Neogene. This paper summarizes the initial characterization of lithofacies and syndepositional structures relevant to understanding the regime and dynamics of past Antarctic ice sheets based on the ANDRILL-MIS Initial Report. Results suggest that the Antarctic Ice Sheet was relatively cold with little basal melting in the …

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Palaeontologic Characterisation And Analysis Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, R. Scherer, M. Hannah, P. Maffioli, D. Persico, C. Sjunneskog, C. P. Strong, M. Taviani, D. Winter, Andrill-Mis Science Team Jan 2007

Palaeontologic Characterisation And Analysis Of The And-1b Core, Andrill Mcmurdo Ice Shelf Project, Antarctica, R. Scherer, M. Hannah, P. Maffioli, D. Persico, C. Sjunneskog, C. P. Strong, M. Taviani, D. Winter, Andrill-Mis Science Team

ANDRILL Research and Publications

Fossils provide key data sets for the interpretation of the AND-1B core. Calcareous plankton and benthos provide the basis for palaeoenvironmental interpretations of both surface and bottom waters. Calcareous fossils are rare throughout, but occurrences noted are significant. Some calcareous fossils provide potential for age control via 86Sr/87Sr, and palaeoenvironmental information may come from Mg/Ca ratios as well as oxygen and carbon isotopes. Organic-walled microfossils provide an index of reworking and transport, as well as the identifi cation of a possible in situ Pliocene assemblage of previously unknown marine palynomorphs. Diatoms are abundant in the core, with …

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Preliminary Chronostratigraphy For The Upper 700 M (Upper Miocene – Pleistocene) Of The And-1b Drillcore Recovered From Beneath The Mcmurdo Ice Shelf, Antarctica, G. S. Wilson, R. H. Levy, G. Browne, N. Dunbar, F. Florindo, S. A. Henrys, I. Graham, W. C. Mcintosh, R. M. Mckay, T. R. Naish, C. Ohneiser, R. D. Powell, J. I. Ross, L. Sagnotti, R. P. Scherer, C. Sjunneskog, C. P. Strong, M. Taviani, D. M. Winter, Andrill-Mis Science Team Jan 2007

Preliminary Chronostratigraphy For The Upper 700 M (Upper Miocene – Pleistocene) Of The And-1b Drillcore Recovered From Beneath The Mcmurdo Ice Shelf, Antarctica, G. S. Wilson, R. H. Levy, G. Browne, N. Dunbar, F. Florindo, S. A. Henrys, I. Graham, W. C. Mcintosh, R. M. Mckay, T. R. Naish, C. Ohneiser, R. D. Powell, J. I. Ross, L. Sagnotti, R. P. Scherer, C. Sjunneskog, C. P. Strong, M. Taviani, D. M. Winter, Andrill-Mis Science Team

ANDRILL Research and Publications

Chronostratigraphic data available for the preliminary age model for the upper 700 m for the AND-1B drill core include diatom biostratigraphy, magnetostratigraphy, 40Ar/39Ar ages on volcanic material, 87Sr/86Sr ages on calcareous fossil material, and surfaces of erosion identified from physical appearance and facies relationships recognized in the AND-1B drill core. The available age data allow a relatively well-constrained age model to be constructed for the upper 700 m of the drill core. Available diatom biostratigraphic constraints and 40Ar/39Ar ages allow a unique correlation of ~70% of the AND-1B magnetic polarity stratigraphy …

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