Numerical analyses of glacial valleys and cirques in the Victoria Valley system, Antarctica, from photogrammetrically derived terrain data.

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Numerical analyses of glacial valleys and cirques in the Victoria Valley system, Antarctica, from photogrammetrically derived terrain data.

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Description: 
Glacial valleys and cirques in the Victoria Valley system were analyzed using digital terrain data (X,Y,Z coordinates) and contour maps produced by photogrammetric techniques from 1:60,000 scale aerial photography. Examination of thirteen valley cross-sections in the Victoria Valley step like profiles which were best interpreted as the results of four valley glaciations. Estimation of sediment or glacier thickness and lake depth were also attempted by extrapolating curves generated with the model beneath the valley floor. Fifty six cirques in the Victoria Valley system were examined in terms of their distribution was considered in relation to lithology, altitude and orientation. The morphology of cirques with stairways (steps) was analyzed in an attempt to determine the factors responsible for the steps and to derive the history of alpine glaciations in the Victoria Valley system. Factors influencing the development of the steps included: (1) lithology, (2) major alpine glaciations, and (3) localized glaciations. The correlation of steps which appeared to have been produced by major alpine glaciations led to the hypotheses that three alpine glaciations occurred in the Victoria Valley system.
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PhD. Thesis, University of Georgia, Athens, 1975. 301p.
Bibliographic Citation: 
Aniya, M.Numerical analyses of glacial valleys and cirques in the Victoria Valley system, Antarctica, from photogrammetrically derived terrain data. -Thesis/DissertationPhD. Thesis, University of Georgia, Athens, 1975. 301p. 1975