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Detailed description, mapping and sampling (for sedimentology, paleontology and chronology studies) of Cenozoic bedded polymicton-type sediments within the Taylor Valley
Entry ID: K042_1974_1975_NZ_3


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Summary
Abstract: Cenozoic bedded polymicton-type sediments within the Taylor Valley were mapped. These polymicton-type sediments are of glacial origin deposited into a body of water and therefore exhibit sorting and also contain boulders dropped from floating ice. Studies of these deposits will enable the chronology and correlation of their deposition to be extended. Silty till deposits (bedded polymictons) were examined throughout the Taylor Valley involving visually searching out and spading of all likely outcrops and detailed description and sampling when they were found. Samples were returned to New Zealand for laboratory analysis including sedimentology, paleontology and chronology. At 10 measured sections in the valley, rather similar fine sediments and inclusions, interbedded with coarse sands, pebbly sands and very coarse unsorted material are recognised below 300m elevation. These sediments are considered as having their origin within a fiord and in a similar manner to those names as basal silts in the Upper Wright Valley. A minimum age for the formation of the Taylor fiord may be determined from radiometric ages of the few tuff beds recognised and also from secondarily transported basalt scoria. A detailed study was also conducted on present day glacial drift deposition from the Taylor Glacier. Beds of till are ubiquitous throughout the Upper Taylor Valley, although exposure is poor except around the snout of the Taylor Glacier. Here meltwater streams from the Rhone and Calkin Glaciers have cut through till sequences on both sides of the valley. These till outcrops were described, sampled and measured for pebble fabrics. Correlation of till deposits throughout the upper valley was attempted, using grain size analysis, pebble orientation, mineralogy, sedimentary structures, etc. Processes of entrainment, transport and deposition of debris were analysed in an attempt to set up the Taylor Glacier as a model for glacial drift deposition. This model was extended to include proglacial, glaciofluvial, glaciolacustrine and aeolian environments by observation of recent sediment deposition in the Wright Valley and at Cape Chocolate.

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Description: Collected samples are held in the PETLAB database of GNS Science. Search under Collector = P Robinson, C Vucetich, AJ Eggers, AS Palmer and Country = Antarctica.


Geographic Coverage
 N: -77.55 S: -77.75  E: 164.0  W: 161.0
 N: -77.3 S: -77.65  E: 163.0  W: 161.0
 N: -77.9333 S: -77.9333  E: 164.5833  W: 164.5833

Temporal Coverage
Start Date: 1974-12-01
Stop Date: 1975-01-10

Start Date: 1975-11-19
Stop Date: 1976-01-05


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > TAYLOR VALLEY
CONTINENT > ANTARCTICA > WRIGHT VALLEY
CONTINENT > ANTARCTICA > CAPE CHOCOLATE
GEOGRAPHIC REGION > POLAR


Science Keywords
PALEOCLIMATE >LAND RECORDS >SEDIMENTS    [Definition]
SOLID EARTH >GEOMORPHIC LANDFORMS/PROCESSES >GLACIAL LANDFORMS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Platform
FIELD SURVEYS    [Information]
GROUND-BASED OBSERVATIONS    [Information]
FIELD INVESTIGATION    [Information]


Instrument
VISUAL OBSERVATIONS    [Information]


Quality
All data relating to this study can be found in the publications. Collected samples are catalogued in the PETLAB database and are held at either GNS Science or Victoria University of Wellington, New Zealand.


Data Set Progress
COMPLETE


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Publications/References
Vucetich, C.G. 1975 A Cenozoic model for Taylor Valley. Dry Valley Drilling Project bulletin 06:42

Vucetich, C.G. Robinson, P.H. 1978 Quaternary stratigraphy and glacial history of the Lower Taylor Valley, Antarctica. New Zealand journal of geology and geophysics 21(4): 467-482

Robinson, P. 1978 Stratigraphic sections of the glacial drift, Taylor and Victoria Valleys, south Victoria Land. Wellington Victoria University of Wellington Geology Department publication no.9 Antarctic data series no.6

Robinson, P. 1979 Taylor glacier, glaciological and sedimentological data tables. Wellington Victoria University of Wellington Victoria University of Wellington, Geology Department publication no.10 Antarctic data series no.7

Robinson, P.H. (comp) 1976 Immediate report of Victoria University of Wellington Antarctic Expedition 1975-1976. Wellington Victoria University of Wellington

Robinson, P.H. Hull, A.G. 1978 Glacier deposits on the Taylor Glacier. New Zealand Antarctic record 1(1): 34-38

Creation and Review Dates
DIF Creation Date: 2009-06-24
Last DIF Revision Date: 2009-07-01


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