Geomorphology
Igneous rocks of basic character dominate the Central Plateau. A great dolerite sheet of Jurassic caps the Plateau and forms its resistant surface. Later, sporadic basalt lavas of Tertiary age fill old drainage depressions cut in the Plateau. The dolerite is far more voluminous, but less varied in i...
Published in: | Papers and Proceedings of The Royal Society of Tasmania |
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Language: | English |
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1972
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Online Access: | https://eprints.utas.edu.au/14600/ https://eprints.utas.edu.au/14600/4/Geomorphology_Banks.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:14600 2023-05-15T18:25:23+02:00 Geomorphology Banks, MR 1972-09 application/pdf https://eprints.utas.edu.au/14600/ https://eprints.utas.edu.au/14600/4/Geomorphology_Banks.pdf en eng https://eprints.utas.edu.au/14600/4/Geomorphology_Banks.pdf Banks, MR 1972 , 'Geomorphology' , Papers and Proceedings of the Royal Society of Tasmania, vol. The La , pp. 55-60 , doi: https://doi.org/10.26749/rstpp.106.1.55 <https://doi.org/10.26749/rstpp.106.1.55>. cc_utas Royal Society of Tasmania RST Van Diemens Land natural history science ecology taxonomy botany zoology geology geography papers & proceedings Australia UTAS Library Article PeerReviewed 1972 ftunivtasmania https://doi.org/10.26749/rstpp.106.1.55 2022-10-31T23:16:59Z Igneous rocks of basic character dominate the Central Plateau. A great dolerite sheet of Jurassic caps the Plateau and forms its resistant surface. Later, sporadic basalt lavas of Tertiary age fill old drainage depressions cut in the Plateau. The dolerite is far more voluminous, but less varied in its chemical composition (approx. 1500 cu. km; silica range 52-60%) than the basalts (approx. 15 cu. km; silica range 36-53%). Both these rocks express important events which affected the Southern Hemisphere. The dolerite is the vast molten response to initial fracturing of the southern supercontinent, Gondwanaland, of which Tasmania is a small fragment. The basalts form part of the eastern Australian volcanic province which erupted in response to warping, stretching and increased heat flow along the continental margin as sea-floor spreading opened up the Tasman Sea and Southern Ocean, beginning about 85 million years ago. Article in Journal/Newspaper Southern Ocean University of Tasmania: UTas ePrints Southern Ocean Papers and Proceedings of The Royal Society of Tasmania 55 60 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Royal Society of Tasmania RST Van Diemens Land natural history science ecology taxonomy botany zoology geology geography papers & proceedings Australia UTAS Library |
spellingShingle |
Royal Society of Tasmania RST Van Diemens Land natural history science ecology taxonomy botany zoology geology geography papers & proceedings Australia UTAS Library Banks, MR Geomorphology |
topic_facet |
Royal Society of Tasmania RST Van Diemens Land natural history science ecology taxonomy botany zoology geology geography papers & proceedings Australia UTAS Library |
description |
Igneous rocks of basic character dominate the Central Plateau. A great dolerite sheet of Jurassic caps the Plateau and forms its resistant surface. Later, sporadic basalt lavas of Tertiary age fill old drainage depressions cut in the Plateau. The dolerite is far more voluminous, but less varied in its chemical composition (approx. 1500 cu. km; silica range 52-60%) than the basalts (approx. 15 cu. km; silica range 36-53%). Both these rocks express important events which affected the Southern Hemisphere. The dolerite is the vast molten response to initial fracturing of the southern supercontinent, Gondwanaland, of which Tasmania is a small fragment. The basalts form part of the eastern Australian volcanic province which erupted in response to warping, stretching and increased heat flow along the continental margin as sea-floor spreading opened up the Tasman Sea and Southern Ocean, beginning about 85 million years ago. |
format |
Article in Journal/Newspaper |
author |
Banks, MR |
author_facet |
Banks, MR |
author_sort |
Banks, MR |
title |
Geomorphology |
title_short |
Geomorphology |
title_full |
Geomorphology |
title_fullStr |
Geomorphology |
title_full_unstemmed |
Geomorphology |
title_sort |
geomorphology |
publishDate |
1972 |
url |
https://eprints.utas.edu.au/14600/ https://eprints.utas.edu.au/14600/4/Geomorphology_Banks.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.utas.edu.au/14600/4/Geomorphology_Banks.pdf Banks, MR 1972 , 'Geomorphology' , Papers and Proceedings of the Royal Society of Tasmania, vol. The La , pp. 55-60 , doi: https://doi.org/10.26749/rstpp.106.1.55 <https://doi.org/10.26749/rstpp.106.1.55>. |
op_rights |
cc_utas |
op_doi |
https://doi.org/10.26749/rstpp.106.1.55 |
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Papers and Proceedings of The Royal Society of Tasmania |
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55 |
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60 |
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1766206821818695680 |