Download Biogeography and Ecology in Antarctica by H. J. Harrington (auth.), J. van Mieghem, P. van Oye (eds.) PDF

By H. J. Harrington (auth.), J. van Mieghem, P. van Oye (eds.)

This publication is the 3rd in aseries of guides dedicated to the biogeographieal and ecological study within the Southern Hemisphere, released within the "Monographiae Biologicae". After facing Australia (vol. VIII) and Southern Africa (Vol. XIV) it was once concept necessary to comprise Antarctiea during this sequence. Ever because the day trip of the "Belgiea" made the 1st suc­ cessful wintering in the antarctie circle in 1898 and taken again a truly rieh harvest of clinical info, Belgium saved a brilliant curiosity in Antarctiea and took an lively half within the smooth and foreign exploration of this great continent. As a part of their courses for the overseas Geophysieal yr (I. G. Y. ) twelve international locations confirmed everlasting or semi-permanent bases at the Antarctie Continent or on subantarctie islands. hence a brand new period of immense and loose foreign clinical collaboration within the Antarctie used to be opened and it culminated within the formula and the signing of the Antarctic Treaty (Washington 1959). It used to be well-known and accredited that "Antarctiea" will likely be used for peaceable reasons in basic terms and "Freedom of clinical research in Antarctiea and coopera­ tion towards that finish, as utilized through the I. G. Y. , shall proceed . . " with a view to arrange this collaboration e. g. by way of complete alternate of courses and resuIts a "Special Committee on Antarctie learn" (S. C. A. R. ) was once based in 1957.

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Phery of East Antarctica was affected by the Lower Paleozoic "Caledonian" orogeny that caused the deformation of the Ross System (PICCIOTTO & COPPEZ, 1963). There is no evidence as to whether the interior of the sub-continent was also affected, but proof of a purely marginal orogeny would be significant in assessing 11 continental drift hypotheses, since it would suggest that East Antarctica had its present general shape and entity as early as the Lower Paleozoic. The paper by STARIK et al. (1961) is in a volume containing the latest lists of isotope dates for Precambrian and Lower Paleozoic rocks of other continents.

PLATFDRM SEDIMENTS 8. J SII8 - GLACIAL BnJROCK SADDLE POLEOF, • (SOVIE7 EAST AN SII8GLA 8EDROC/( PACIFIC OCEAN Fig. 4. 4. GEOLOGY INDIAN SCHEMATIC WEST ANTARCTICA QUATERNARY rJlIOCKS 'HIGH 'NT COUPLEX, TS & SILLS. SEDIMENTS, MOIIAINES, NOT SHOWN. 10,11 CENOZOIC 12. VOLCANICS. 12B. MOMURDO VOLCANICS. IJPPER ceNOZOIC ALKALINE OLIVINE-BASALT ASSOC. 12 A~BYRD"VOLCANICS. IJPPEII CENOZO/c ALKALINE OLIVINE-BASALT ASSOC. SOUTH SHETLAND ISLANDS. ) 10 JAMES ROSS VOLCANICS. IJNER MIOCENE BASALTS . 9. {9A.

Which indicates at least five tectono-magmatic cycles. Similar cycles are recognised by ANGINO (1963). y. indicate Lower Paleozoic metamorphism and intrusion, continuing to the latest Silurian or earliest Devonian. Rocks of this age are so widespread as to suggest the possibility that the whole of the peri40 30 >- u Z LU :::l 20 o LU n:: LL 10 Fig. 5. Frequency of isotope dates, Antarctica. The youngest dates are omitted. Supplied by E. E . ANGINO. Semi-log-scale. phery of East Antarctica was affected by the Lower Paleozoic "Caledonian" orogeny that caused the deformation of the Ross System (PICCIOTTO & COPPEZ, 1963).

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