Health Assessment and Diseases of the Weddell seal, Leptonochotes weddelli, in Vestfold Hills, East Antarctica

2009 ◽  
pp. 139-166 ◽  
Author(s):  
R. A. McFarlane
Keyword(s):  
Health Assessment ◽  
Weddell Seal ◽  
East Antarctica ◽  
Vestfold Hills

Penguin occupation in the Vestfold Hills

2008 ◽  
Vol 21 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Tao Huang ◽  
Liguang Sun ◽  
Yuhong Wang ◽  
Renbin Zhu
Keyword(s):  
Sediment Core ◽  
Environmental Changes ◽  
Sediment Cores ◽  
East Antarctica ◽  
Before Present ◽  
The Holocene ◽  
History Of ◽  
Vestfold Hills ◽  
Free Area ◽  
Ornithogenic Sediment

AbstractDuring CHINARE-22 (December 2005–March 2006), we investigated six penguin colonies in the Vestfold Hills, East Antarctica, and collected several penguin ornithogenic sediment cores, samples of fresh guano and modern penguin bone and feather. We selected seven penguin bones and feathers and six sediments from the longest sediment core and performed AMS14C dating. The results indicate that penguins occupied the Vestfold Hills as early as 8500 calibrated years before present (cal. yrbp), following local deglaciation and the formation of the ice free area. This is the first report on the Holocene history of penguins in the Vestfold Hills. As in other areas of Antarctica, penguins occupied this area as soon as local ice retreated and the ice free area formed, and they are very sensitive to climatic and environmental changes. This work provides the foundation for understanding the history of penguins occupation in Vestfold Hills, East Antarctica.

Landform evolution in the Marine Plain region, Vestfold Hills, East Antarctica

2006 ◽  
Vol 18 (2) ◽  
pp. 239-259 ◽  
Author(s):  
Patrick G. Quilty
Keyword(s):  
Sedimentary Rocks ◽  
East Antarctica ◽  
Patterned Ground ◽  
Antarctic Ice Sheet ◽  
Landform Evolution ◽  
Ice Load ◽  
Exposed Rock ◽  
Plain Region ◽  
Vestfold Hills ◽  
Land Surfaces

Landforms of Marine Plain in the Vestfold Hills contrast with those of most in the Vestfold Hills. They include consistent land surfaces at 40+ m and 25 m, characteristics controlled by orientation of rock features, and imprints of phases of glaciation, deglaciation and marine and freshwater inundation. The 40+ m surface is widespread in the Vestfold Hills and has been noted previously. The 25 m level was an earlier coastline, is more localized and marked by water rounded boulders; it serves to differentiate clearly between two terrains of different relief and erratic distribution. The Pliocene sedimentary rocks below the 25 m level have been dislocated, probably during an interval of glaciotectonism caused by northward movement of sediments under an ice load due to northern extension of the Sørsdal Glacier or expansion of the East Antarctic Ice Sheet some time after the mid-Pliocene. Soil development is active. These features are accompanied by the normal aspects of a glaciated landscape such as glacial striations, sand wedges, erratics, and patterned ground. Wind has been important in transporting sand and developing honeycomb weathering on exposed rock faces.

scholarly journals A testimony of detachment of an inland lake from marine influence during the mid-Holocene in the Vestfold Hills region, East Antarctica

2013 ◽  
Vol 13 (4) ◽  
pp. 209-214 ◽  
Author(s):  
Abhijit Mazumder ◽  
Pawan Govil ◽  
Shalini Sharma ◽  
Rasik Ravindra ◽  
Neloy Khare ◽  
...  
Keyword(s):  
Sediment Core ◽  
Environmental Changes ◽  
East Antarctica ◽  
Rare Occurrence ◽  
Salt Crystal ◽  
The Core ◽  
Inland Lake ◽  
Diatom Population ◽  
Marine Influence ◽  
Vestfold Hills

Abstract A 47 cm long sediment core collected from an inland lake of the Vestfold Hills, East Antarctica has been examined to reconstruct the palaeolacustrine environmental changes. The core shows dates at two core intervals of 18-19 cm and 28-29 cm as 5050±98 yrs BP and 5560±96 yrs BP, respectively. The core exhibits a good amount of diatom population throughout the length. Prior to 5560±96 yrs BP, the core shows high abundance of diatom population (>10×107 g-1) along with sufficient salt crystal, which indicates the connection of this lake with the marine environment. From 5560±96 yrs BP to 5050±98 yrs BP the total number diatoms decreased substantially along with the decrease in salt crystal, which indicates the withdrawal of the marine influence from the lake during that period. From 5050±98 yrs BP to Recent, the low number of diatoms and the rare occurrence of salt crystal suggest that the lake remained mostly detached from the sea during the last 5000 yrs.

Thermal history of the Vestfold Hills (East Antarctica) between Lambert rifting and Gondwana break-up, evidence from apatite fission track data

2007 ◽  
Vol 19 (1) ◽  
pp. 97-106 ◽  
Author(s):  
Frank Lisker ◽  
Christopher J.L. Wilson ◽  
Helen J. Gibson
Keyword(s):  
Large Scale ◽  
Fission Track ◽  
East Antarctica ◽  
Prydz Bay ◽  
Apatite Fission Track ◽  
Subsequent Evolution ◽  
History Of ◽  
Thermal Histories ◽  
Break Up ◽  
Vestfold Hills

Analysis of five basement samples from the Vestfold Hills (East Antarctica) reveals pooled apatite fission track (FT) ages ranging from 188 to 264 Ma and mean lengths of 13.7 to 14.9 μm. Quantitative thermal histories derived from these data give consistent results indicating onset of cooling/denudation began sometime prior to 240 Ma, with final cooling below 105°–125°C occurring between 240 and 220 Ma (Triassic). A Cretaceous denudation phase can be inferred from the sedimentary record of the Prydz Bay offshore the Vestfold Hills. The two denudational episodes are likely associated with Palaeozoic large-scale rifting processes that led to the formation of the adjacent Lambert Graben, and to the Cretaceous Gondwana break-up between Antarctica and India. Subsequent evolution of the East Antarctic passive continental margin likely occurred throughout the Cenozoic based on the depositional record in Prydz Bay and constraints (though tentative) from FT data.

An analysis of the limnology and sedimentary diatom flora of fourteen lakes and ponds from the Windmill Islands, East Antarctica

2001 ◽  
Vol 13 (4) ◽  
pp. 410-419 ◽  
Author(s):  
D. Roberts ◽  
A. McMinn ◽  
N. Johnston ◽  
D.B. Gore ◽  
M. Melles ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Saline Lakes ◽  
East Antarctica ◽  
Freshwater Lakes ◽  
Diatom Flora ◽  
Larsemann Hills ◽  
Freshwater Ponds ◽  
Windmill Islands ◽  
Vestfold Hills ◽  
Floral Assemblage

The limnology and sedimentary diatom flora of fourteen lakes and ponds from the Windmill Islands, East Antarctica, is presented. Saline lakes, saline ponds and freshwater ponds are represented in this dataset. The Windmill Island lake diatom flora represents an intermediate floral assemblage between that of the freshwater lakes of the Larsemann Hills and the saline lakes of Vestfold Hills, East Antarctica. Variations within this assemblage are related to water chemistry variables in the Windmill Island lakes. In particular, a lakewater salinity/phosphate gradient can explain the variation observed in the sedimentary diatom flora of the lakes and ponds included in this study.

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